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  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Ground based in situ observations of filter_absorption_photometer at El Tololo (CL0001R)" />
  <attribute name="keywords" value="reference_zero_signal, sensing_beam_signal, GAW-WDCA, attenuation_coefficient, mass_concentration_of_equivalent_black_carbon_in_dry_aerosol_particles_in _air, CL0001R, bypass_fraction, aerosol, El Tololo, equivalent_black_carbon, reference_beam_signal, flow_rate, sensing_zero_signal" />
  <attribute name="id" value="H6TE-GRXB.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="GAW-WDCA" />
  <attribute name="acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
  <attribute name="doi" value="https://doi.org/10.48597/H6TE-GRXB" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Nicolas Bukowiecki, Gaston Torres, attenuation_coefficient, bypass_fraction, equivalent_black_carbon, flow_rate, reference_beam_signal, reference_zero_signal, sensing_beam_signal, sensing_zero_signal - filter_absorption_photometer at El Tololo, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/H6TE-GRXB" />
  <attribute name="summary" value="Ground based in situ observations of filter_absorption_photometer at El Tololo (CL0001R). These measurements are gathered as a part of the following projects GAW-WDCA and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: attenuation_coefficient in aerosol, bypass_fraction in aerosol, equivalent_black_carbon in aerosol (mass_concentration_of_equivalent_black_carbon_in_dry_aerosol_particles_in _air), flow_rate in aerosol, reference_beam_signal in aerosol, reference_zero_signal in aerosol, sensing_beam_signal in aerosol, sensing_zero_signal in aerosol" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, 5232, Villigen PSI, Switzerland" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2020-03-23T17:18:59 UTC" />
  <attribute name="date_metadata_modified" value="2020-03-23T17:18:59 UTC" />
  <attribute name="creator_name" value="Nicolas Bukowiecki, Gaston Torres" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value=", " />
  <attribute name="creator_institution" value=", " />
  <attribute name="contributor_name" value="Luis Valle" />
  <attribute name="contributor_role" value="data submitter" />
  <attribute name="publisher_type" value="institution" />
  <attribute name="publisher_name" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_institution" value="NILU - Norwegian Institute for Air Research, ATMOS, EBAS" />
  <attribute name="publisher_email" value="ebas@nilu.no" />
  <attribute name="publisher_url" value="https://www.nilu.no/" />
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  <attribute name="time_coverage_start" value="2015-01-01T00:08:36 UTC" />
  <attribute name="time_coverage_end" value="2016-01-01T00:00:00 UTC" />
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  <attribute name="ebas_citation" value="Nicolas Bukowiecki, Gaston Torres, attenuation_coefficient, bypass_fraction, equivalent_black_carbon, flow_rate, reference_beam_signal, reference_zero_signal, sensing_beam_signal, sensing_zero_signal - filter_absorption_photometer at El Tololo, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/H6TE-GRXB" />
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  <attribute name="ebas_revision_date" value="20200323171859" />
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  <attribute name="ebas_station_wmo_region" value="3" />
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  <attribute name="ebas_measurement_height" value="8.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_laboratory_code" value="CL01L" />
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  <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
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  <attribute name="ebas_instrument_model" value="AE31" />
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  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
  <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
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  <attribute name="ebas_volume_std_pressure" value="instrument internal" />
  <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
  <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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  <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
  <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
  <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
  <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
  <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
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  <attribute name="geospatial_lon_units" value="degrees_east" />
  <attribute name="comment" value="{&#xA;    &quot;Data definition&quot;: &quot;EBAS_1.1&quot;,&#xA;    &quot;Data license&quot;: &quot;https://creativecommons.org/licenses/by/4.0/&quot;,&#xA;    &quot;Citation&quot;: &quot;Nicolas Bukowiecki, Gaston Torres, attenuation_coefficient, bypass_fraction, equivalent_black_carbon, flow_rate, reference_beam_signal, reference_zero_signal, sensing_beam_signal, sensing_zero_signal - filter_absorption_photometer at El Tololo, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/H6TE-GRXB&quot;,&#xA;    &quot;Set type code&quot;: &quot;TI&quot;,&#xA;    &quot;Timezone&quot;: &quot;UTC&quot;,&#xA;    &quot;File name&quot;: &quot;H6TE-GRXB.nc&quot;,&#xA;    &quot;Represents DOI&quot;: &quot;https://doi.org/10.48597/H6TE-GRXB&quot;,&#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/H6TE-GRXB&quot;,&#xA;    &quot;File creation&quot;: &quot;2023-12-16T08:55:00.726123 UTC&quot;,&#xA;    &quot;Export state&quot;: &quot;2017-06-20T13:39:56.933000 UTC&quot;,&#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;,&#xA;    &quot;Startdate&quot;: &quot;20150101000836&quot;,&#xA;    &quot;Revision date&quot;: &quot;20200323171859&quot;,&#xA;    &quot;Version&quot;: &quot;1&quot;,&#xA;    &quot;Version description&quot;: &quot;Version numbering not tracked, generated by data.aggregate.ebas r4437&quot;,&#xA;    &quot;Statistics&quot;: &quot;arithmetic mean&quot;,&#xA;    &quot;Data level&quot;: &quot;0&quot;,&#xA;    &quot;Period code&quot;: &quot;1y&quot;,&#xA;    &quot;Resolution code&quot;: &quot;5mn&quot;,&#xA;    &quot;Sample duration&quot;: &quot;5mn&quot;,&#xA;    &quot;Orig. time res.&quot;: &quot;1mn&quot;,&#xA;    &quot;Station code&quot;: &quot;CL0001R&quot;,&#xA;    &quot;Platform code&quot;: &quot;CL0001S&quot;,&#xA;    &quot;Station name&quot;: &quot;El Tololo&quot;,&#xA;    &quot;Station WDCA-ID&quot;: &quot;GAWACL__TLL&quot;,&#xA;    &quot;Station GAW-ID&quot;: &quot;TLL&quot;,&#xA;    &quot;Station GAW-Name&quot;: &quot;El Tololo&quot;,&#xA;    &quot;Station land use&quot;: &quot;Desert&quot;,&#xA;    &quot;Station setting&quot;: &quot;Mountain&quot;,&#xA;    &quot;Station GAW type&quot;: &quot;R&quot;,&#xA;    &quot;Station WMO region&quot;: &quot;3&quot;,&#xA;    &quot;Station latitude&quot;: &quot;-30.17254&quot;,&#xA;    &quot;Station longitude&quot;: &quot;-70.79923&quot;,&#xA;    &quot;Station altitude&quot;: &quot;2220.0 m&quot;,&#xA;    &quot;Measurement height&quot;: &quot;8.0 m&quot;,&#xA;    &quot;Regime&quot;: &quot;IMG&quot;,&#xA;    &quot;Laboratory code&quot;: &quot;CL01L&quot;,&#xA;    &quot;Instrument type&quot;: &quot;filter_absorption_photometer&quot;,&#xA;    &quot;Instrument name&quot;: &quot;Magee_AE31_TLL_dry&quot;,&#xA;    &quot;Instrument manufacturer&quot;: &quot;Magee&quot;,&#xA;    &quot;Instrument model&quot;: &quot;AE31&quot;,&#xA;    &quot;Instrument serial number&quot;: &quot;1146_1201&quot;,&#xA;    &quot;Method ref&quot;: &quot;CL01L_aethalometer&quot;,&#xA;    &quot;Inlet type&quot;: &quot;Hat or hood&quot;,&#xA;    &quot;Humidity/temperature control&quot;: &quot;Temperature conditioning at 25 deg. C&quot;,&#xA;    &quot;Humidity/temperature control description&quot;: &quot;Temperature conditioning at room temperature&quot;,&#xA;    &quot;Volume std. temperature&quot;: &quot;instrument internal&quot;,&#xA;    &quot;Volume std. pressure&quot;: &quot;instrument internal&quot;,&#xA;    &quot;Measurement uncertainty expl.&quot;: &quot;Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed.&quot;,&#xA;    &quot;Zero/negative values&quot;: &quot;Zero and neg. values may appear due to statistical variations at very low concentrations&quot;,&#xA;    &quot;Organization&quot;: &quot;CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland&quot;,&#xA;    &quot;Framework acronym&quot;: &quot;GAW-WDCA&quot;,&#xA;    &quot;Framework name&quot;: &quot;World Data Centre for Aerosols&quot;,&#xA;    &quot;Framework description&quot;: &quot;The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme.&quot;,&#xA;    &quot;Framework contact name&quot;: &quot;Markus Fiebig&quot;,&#xA;    &quot;Framework contact email&quot;: &quot;Markus.Fiebig@nilu.no&quot;,&#xA;    &quot;Originator&quot;: &quot;Torres, Gaston, , , , , , , , , &quot;,&#xA;    &quot;Submitter&quot;: &quot;Valle, Luis, , , , , , , , , &quot;,&#xA;    &quot;Acknowledgement&quot;: &quot;Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator.&quot;,&#xA;    &quot;Comment&quot;: &quot;calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2&quot;&#xA;}" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="pressure_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="relative_humidity" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="relative_humidity" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="%" />
    <attribute name="ancillary_variables" value="relative_humidity_qc relative_humidity_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20160718090337" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="relative_humidity" />
    <attribute name="ebas_unit" value="%" />
    <attribute name="ebas_matrix" value="instrument" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="relative_humidity_qc" shape="relative_humidity_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="relative_humidity_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="temperature" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="K" />
    <attribute name="ancillary_variables" value="temperature_qc temperature_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20160718090337" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="temperature" />
    <attribute name="ebas_unit" value="K" />
    <attribute name="ebas_matrix" value="instrument" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="temperature_qc" shape="temperature_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="temperature_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="attenuation_coefficient_0" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="attenuation_coefficient_0_qc attenuation_coefficient_0_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="attenuation_coefficient" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="attenuation_coefficient_0_qc" shape="attenuation_coefficient_0_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="attenuation_coefficient_0_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="attenuation_coefficient_1" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="attenuation_coefficient_1_qc attenuation_coefficient_1_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="attenuation_coefficient" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="attenuation_coefficient_1_qc" shape="attenuation_coefficient_1_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="attenuation_coefficient_1_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="attenuation_coefficient_2" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="attenuation_coefficient_2_qc attenuation_coefficient_2_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="attenuation_coefficient" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="attenuation_coefficient_2_qc" shape="attenuation_coefficient_2_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="attenuation_coefficient_2_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="attenuation_coefficient_3" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="attenuation_coefficient_3_qc attenuation_coefficient_3_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="attenuation_coefficient" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="attenuation_coefficient_3_qc" shape="attenuation_coefficient_3_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="attenuation_coefficient_3_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="attenuation_coefficient_4" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="attenuation_coefficient_4_qc attenuation_coefficient_4_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="attenuation_coefficient" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
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    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="attenuation_coefficient_4_qc" shape="attenuation_coefficient_4_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="attenuation_coefficient_4_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="attenuation_coefficient_5" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="attenuation_coefficient_5_qc attenuation_coefficient_5_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
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    <attribute name="ebas_station_gaw_id" value="TLL" />
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    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="attenuation_coefficient" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
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    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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  </variable>
  <variable name="attenuation_coefficient_5_qc" shape="attenuation_coefficient_5_qc_flags time" type="int">
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    <attribute name="units" value="1" />
  </variable>
  <variable name="attenuation_coefficient_5_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="attenuation_coefficient_6" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="attenuation_coefficient_6_qc attenuation_coefficient_6_ebasmetadata" />
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    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
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    <attribute name="ebas_station_gaw_type" value="R" />
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    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="attenuation_coefficient" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
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    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
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  </variable>
  <variable name="attenuation_coefficient_6_qc" shape="attenuation_coefficient_6_qc_flags time" type="int">
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    <attribute name="units" value="1" />
  </variable>
  <variable name="attenuation_coefficient_6_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="bypass_fraction" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="bypass_fraction_qc bypass_fraction_ebasmetadata" />
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    <attribute name="ebas_revision_date" value="20200323171859" />
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    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
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    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
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    <attribute name="ebas_station_gaw_id" value="TLL" />
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    <attribute name="ebas_station_land_use" value="Desert" />
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    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="bypass_fraction" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
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    <attribute name="ebas_inlet_type" value="Hat or hood" />
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    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
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    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
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    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="bypass_fraction_qc" shape="bypass_fraction_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="bypass_fraction_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="equivalent_black_carbon_0" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_equivalent_black_carbon_in_dry_aerosol_particles_in _air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="equivalent_black_carbon_0_qc equivalent_black_carbon_0_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="equivalent_black_carbon" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_detection_limit" value="0.01 ug/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by instrument noise characteristics, no detection limit flag used" />
    <attribute name="ebas_measurement_uncertainty" value="100.0 %" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="equivalent_black_carbon_0_qc" shape="equivalent_black_carbon_0_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="equivalent_black_carbon_0_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="equivalent_black_carbon_1" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_equivalent_black_carbon_in_dry_aerosol_particles_in _air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="equivalent_black_carbon_1_qc equivalent_black_carbon_1_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="equivalent_black_carbon" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_detection_limit" value="0.01 ug/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by instrument noise characteristics, no detection limit flag used" />
    <attribute name="ebas_measurement_uncertainty" value="100.0 %" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="equivalent_black_carbon_1_qc" shape="equivalent_black_carbon_1_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="equivalent_black_carbon_1_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="equivalent_black_carbon_2" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_equivalent_black_carbon_in_dry_aerosol_particles_in _air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="equivalent_black_carbon_2_qc equivalent_black_carbon_2_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="equivalent_black_carbon" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_detection_limit" value="0.01 ug/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by instrument noise characteristics, no detection limit flag used" />
    <attribute name="ebas_measurement_uncertainty" value="100.0 %" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
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    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="equivalent_black_carbon_2_qc" shape="equivalent_black_carbon_2_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="equivalent_black_carbon_2_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="equivalent_black_carbon_3" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_equivalent_black_carbon_in_dry_aerosol_particles_in _air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="equivalent_black_carbon_3_qc equivalent_black_carbon_3_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="equivalent_black_carbon" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
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    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
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    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_detection_limit" value="0.01 ug/m3" />
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    <attribute name="ebas_measurement_uncertainty" value="100.0 %" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
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    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="equivalent_black_carbon_3_qc" shape="equivalent_black_carbon_3_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="equivalent_black_carbon_3_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="equivalent_black_carbon_4" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_equivalent_black_carbon_in_dry_aerosol_particles_in _air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="equivalent_black_carbon_4_qc equivalent_black_carbon_4_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="equivalent_black_carbon" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_detection_limit" value="0.01 ug/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by instrument noise characteristics, no detection limit flag used" />
    <attribute name="ebas_measurement_uncertainty" value="100.0 %" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="equivalent_black_carbon_4_qc" shape="equivalent_black_carbon_4_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="units" value="1" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
  </variable>
  <variable name="equivalent_black_carbon_4_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="equivalent_black_carbon_5" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_equivalent_black_carbon_in_dry_aerosol_particles_in _air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="equivalent_black_carbon_5_qc equivalent_black_carbon_5_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="equivalent_black_carbon" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_detection_limit" value="0.01 ug/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by instrument noise characteristics, no detection limit flag used" />
    <attribute name="ebas_measurement_uncertainty" value="100.0 %" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="equivalent_black_carbon_5_qc" shape="equivalent_black_carbon_5_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="equivalent_black_carbon_5_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="equivalent_black_carbon_6" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_equivalent_black_carbon_in_dry_aerosol_particles_in _air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="equivalent_black_carbon_6_qc equivalent_black_carbon_6_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="equivalent_black_carbon" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_detection_limit" value="0.01 ug/m3" />
    <attribute name="ebas_detection_limit_expl" value="Determined by instrument noise characteristics, no detection limit flag used" />
    <attribute name="ebas_measurement_uncertainty" value="100.0 %" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="equivalent_black_carbon_6_qc" shape="equivalent_black_carbon_6_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="equivalent_black_carbon_6_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="flow_rate" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="l/min" />
    <attribute name="ancillary_variables" value="flow_rate_qc flow_rate_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="flow_rate" />
    <attribute name="ebas_unit" value="l/min" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="flow_rate_qc" shape="flow_rate_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="flow_rate_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="reference_beam_signal_0" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="reference_beam_signal_0_qc reference_beam_signal_0_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="reference_beam_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA" />
    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="reference_beam_signal_0_qc" shape="reference_beam_signal_0_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="reference_beam_signal_0_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="reference_beam_signal_1" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="reference_beam_signal_1_qc reference_beam_signal_1_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="reference_beam_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
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    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
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    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
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    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="reference_beam_signal_1_qc" shape="reference_beam_signal_1_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="reference_beam_signal_1_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="reference_beam_signal_2" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="reference_beam_signal_2_qc reference_beam_signal_2_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
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    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
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    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="reference_beam_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
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    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
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    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
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    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
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    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="reference_beam_signal_2_qc" shape="reference_beam_signal_2_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
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    <attribute name="units" value="1" />
  </variable>
  <variable name="reference_beam_signal_2_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="reference_beam_signal_3" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="reference_beam_signal_3_qc reference_beam_signal_3_ebasmetadata" />
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    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
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    <attribute name="ebas_station_gaw_type" value="R" />
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    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="reference_beam_signal" />
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    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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  <variable name="reference_beam_signal_3_qc" shape="reference_beam_signal_3_qc_flags time" type="int">
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    <attribute name="units" value="1" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="reference_beam_signal_4" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
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    <attribute name="ebas_sample_duration" value="5mn" />
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    <attribute name="ebas_station_gaw_type" value="R" />
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    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
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    <attribute name="ebas_component" value="reference_beam_signal" />
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    <attribute name="ebas_matrix" value="aerosol" />
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  <variable name="reference_beam_signal_4_qc" shape="reference_beam_signal_4_qc_flags time" type="int">
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  </variable>
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="reference_beam_signal_5" shape="time" type="double">
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    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_sample_duration" value="5mn" />
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    <attribute name="ebas_station_land_use" value="Desert" />
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    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="reference_beam_signal" />
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    <attribute name="ebas_matrix" value="aerosol" />
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    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
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  </variable>
  <variable name="reference_beam_signal_5_qc" shape="reference_beam_signal_5_qc_flags time" type="int">
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  </variable>
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
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    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
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    <attribute name="ebas_station_gaw_id" value="TLL" />
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    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="reference_beam_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
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    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
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    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
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  <variable name="reference_beam_signal_6_qc" shape="reference_beam_signal_6_qc_flags time" type="int">
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  </variable>
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
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    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
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    <attribute name="ebas_orig_time_res" value="1mn" />
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    <attribute name="ebas_component" value="reference_zero_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
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    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
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    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
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  </variable>
  <variable name="reference_zero_signal_0_qc" shape="reference_zero_signal_0_qc_flags time" type="int">
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    <attribute name="units" value="1" />
  </variable>
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="reference_zero_signal_1" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
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    <attribute name="ebas_station_latitude" value="-30.17254" />
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    <attribute name="ebas_station_altitude" value="2220.0 m" />
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    <attribute name="ebas_matrix" value="aerosol" />
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  <variable name="reference_zero_signal_1_qc" shape="reference_zero_signal_1_qc_flags time" type="int">
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="ebas_station_altitude" value="2220.0 m" />
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    <attribute name="ebas_component" value="reference_zero_signal" />
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  <variable name="reference_zero_signal_3_qc" shape="reference_zero_signal_3_qc_flags time" type="int">
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="reference_zero_signal_4" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="reference_zero_signal_4_qc reference_zero_signal_4_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
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    <attribute name="ebas_station_setting" value="Mountain" />
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    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="reference_zero_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
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    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
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  <variable name="reference_zero_signal_4_qc" shape="reference_zero_signal_4_qc_flags time" type="int">
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    <attribute name="units" value="1" />
  </variable>
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="reference_zero_signal_5" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
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    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
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    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
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    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="reference_zero_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
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  </variable>
  <variable name="reference_zero_signal_5_qc" shape="reference_zero_signal_5_qc_flags time" type="int">
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="reference_zero_signal_6" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
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    <attribute name="ebas_orig_time_res" value="1mn" />
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    <attribute name="ebas_station_gaw_type" value="R" />
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    <attribute name="ebas_component" value="reference_zero_signal" />
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    <attribute name="ebas_matrix" value="aerosol" />
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  <variable name="reference_zero_signal_6_qc" shape="reference_zero_signal_6_qc_flags time" type="int">
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="sensing_beam_signal_0" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_component" value="sensing_beam_signal" />
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  <variable name="sensing_beam_signal_0_qc" shape="sensing_beam_signal_0_qc_flags time" type="int">
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    <attribute name="ebas_component" value="sensing_beam_signal" />
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  <variable name="sensing_beam_signal_1_qc" shape="sensing_beam_signal_1_qc_flags time" type="int">
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    <attribute name="standard_name" value="status_flag" />
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    <attribute name="units" value="1" />
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  <variable name="sensing_beam_signal_1_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="sensing_beam_signal_2_qc sensing_beam_signal_2_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
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    <attribute name="ebas_station_latitude" value="-30.17254" />
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    <attribute name="ebas_station_altitude" value="2220.0 m" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="sensing_beam_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
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    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
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  <variable name="sensing_beam_signal_2_qc" shape="sensing_beam_signal_2_qc_flags time" type="int">
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    <attribute name="units" value="1" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
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    <attribute name="cell_methods" value="time: mean" />
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    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
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    <attribute name="ebas_orig_time_res" value="1mn" />
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    <attribute name="ebas_component" value="sensing_beam_signal" />
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    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
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  <variable name="sensing_beam_signal_3_qc" shape="sensing_beam_signal_3_qc_flags time" type="int">
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    <attribute name="units" value="1" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
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    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
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  <variable name="sensing_beam_signal_6_qc" shape="sensing_beam_signal_6_qc_flags time" type="int">
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    <attribute name="units" value="1" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="sensing_zero_signal_0" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="sensing_zero_signal_0_qc sensing_zero_signal_0_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
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    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
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    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="sensing_zero_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
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    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
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  <variable name="sensing_zero_signal_0_qc" shape="sensing_zero_signal_0_qc_flags time" type="int">
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    <attribute name="units" value="1" />
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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  <variable name="sensing_zero_signal_1" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
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    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
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    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
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    <attribute name="ebas_component" value="sensing_zero_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
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  <variable name="sensing_zero_signal_1_qc" shape="sensing_zero_signal_1_qc_flags time" type="int">
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    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
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    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Valle, Luis, , , , , , , , , " />
    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="sensing_zero_signal_4_qc" shape="sensing_zero_signal_4_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="sensing_zero_signal_4_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="sensing_zero_signal_5" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="sensing_zero_signal_5_qc sensing_zero_signal_5_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4437" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="0" />
    <attribute name="ebas_sample_duration" value="5mn" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
    <attribute name="ebas_platform_code" value="CL0001S" />
    <attribute name="ebas_station_name" value="El Tololo" />
    <attribute name="ebas_station_wdca_id" value="GAWACL__TLL" />
    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
    <attribute name="ebas_station_setting" value="Mountain" />
    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="sensing_zero_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="CL01L" />
    <attribute name="ebas_instrument_type" value="filter_absorption_photometer" />
    <attribute name="ebas_instrument_name" value="Magee_AE31_TLL_dry" />
    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="CH02L, Paul Scherrer Institut, PSI, Laboratory of Atmospheric Chemistry (LAC), OFLB, , 5232, Villigen PSI, Switzerland" />
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    <attribute name="ebas_framework_name" value="World Data Centre for Aerosols" />
    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
    <attribute name="ebas_framework_contact_name" value="Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Torres, Gaston, , , , , , , , , " />
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    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="sensing_zero_signal_5_qc" shape="sensing_zero_signal_5_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="sensing_zero_signal_5_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="sensing_zero_signal_6" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="no unit" />
    <attribute name="ancillary_variables" value="sensing_zero_signal_6_qc sensing_zero_signal_6_ebasmetadata" />
    <attribute name="cell_methods" value="time: mean" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200323171859" />
    <attribute name="ebas_version" value="1" />
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    <attribute name="ebas_data_level" value="0" />
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    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="CL0001R" />
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    <attribute name="ebas_station_gaw_id" value="TLL" />
    <attribute name="ebas_station_gaw_name" value="El Tololo" />
    <attribute name="ebas_station_land_use" value="Desert" />
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    <attribute name="ebas_station_gaw_type" value="R" />
    <attribute name="ebas_station_wmo_region" value="3" />
    <attribute name="ebas_station_latitude" value="-30.17254" />
    <attribute name="ebas_station_longitude" value="-70.79923" />
    <attribute name="ebas_station_altitude" value="2220.0 m" />
    <attribute name="ebas_measurement_height" value="8.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="sensing_zero_signal" />
    <attribute name="ebas_unit" value="no unit" />
    <attribute name="ebas_matrix" value="aerosol" />
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    <attribute name="ebas_instrument_manufacturer" value="Magee" />
    <attribute name="ebas_instrument_model" value="AE31" />
    <attribute name="ebas_instrument_serial_number" value="1146_1201" />
    <attribute name="ebas_method_ref" value="CL01L_aethalometer" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Temperature conditioning at 25 deg. C" />
    <attribute name="ebas_humidity_temperaure_control_description" value="Temperature conditioning at room temperature" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_measurement_uncertainty_expl" value="Intercomparisons with thermo-optical analysis have shown an uncertainty of a faktor 2 regardless specific absorption cross-section assumed." />
    <attribute name="ebas_zero_negative_values" value="Zero and neg. values may appear due to statistical variations at very low concentrations" />
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    <attribute name="ebas_framework_description" value="The World Data Centre for Aerosols is the data repository and archive for microphysical, optical, and chemical properties of atmospheric aerosol of the World Meteorological Organisation's (WMO) Global Atmosphere Watch (GAW) programme." />
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    <attribute name="ebas_acknowledgement" value="Project CATCOS, Request acknowledgement details from data originator and prinicipal investigator." />
    <attribute name="ebas_comment" value="calibration factor / mean ratio=1.0; sample_spot_area=5.0e-5 m2" />
  </variable>
  <variable name="sensing_zero_signal_6_qc" shape="sensing_zero_signal_6_qc_flags time" type="int">
    <attribute name="_FillValue" type="int" value="0" />
    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="sensing_zero_signal_6_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="time" shape="time" type="double">
    <attribute name="long_name" value="time of measurement" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="days since 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <attribute name="bounds" value="time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
  <variable name="metadata_time" shape="metadata_time" type="double">
    <attribute name="long_name" value="time of ebas metadata intervals" />
    <attribute name="standard_name" value="time" />
    <attribute name="units" value="days since 1900-01-01 00:00:00 UTC" />
    <attribute name="axis" value="T" />
    <attribute name="calendar" value="gregorian" />
    <attribute name="bounds" value="metadata_time_bnds" />
    <attribute name="_CoordinateAxisType" value="Time" />
  </variable>
</netcdf>
