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  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Nitrogen_dioxide at Eupen" />
  <attribute name="summary" value="Nitrogen_dioxide at Eupen. These measurements are gathered as a part of the following projects CAMP, EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ['nitrogen_dioxide in air (mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air)']" />
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  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="CAMP, EMEP" />
  <attribute name="acknowledgement" value="" />
  <attribute name="doi" value="https://doi.org/10.48597/BWA3-9SZQ" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Vanpoucke, C., Fierens, F., CAMP, EMEP, 2025, Nitrogen_dioxide at Eupen, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/BWA3-9SZQ" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="BE02L &quot;Belgian Interregional Environment Agency&quot; &quot;IRCEL - CELINE&quot; &quot;Kunstlaan 10-11&quot; 1210 Brussel &quot;The Netherlands&quot;" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2025-10-15T10:21:00.238055Z" />
  <attribute name="date_metadata_modified" value="2025-10-15T10:21:00 UTC" />
  <attribute name="creator_name" value="Charlotte Vanpoucke, Frans Fierens" />
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  <attribute name="contributor_name" value="Charlotte Vanpoucke, Frans Fierens" />
  <attribute name="contributor_role" value="data submitter, 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/" />
  <attribute name="geospatial_bounds" value="POINT Z (50.629421 6.001019 295.0)" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="geospatial_lat_min" type="double" value="50.629421" />
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  <attribute name="time_coverage_start" value="2013-01-01T00:00:00 UTC" />
  <attribute name="time_coverage_end" value="2024-01-01T00:00:00 UTC" />
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  <attribute name="timezone" value="UTC" />
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  <attribute name="ebas_citation" value="Vanpoucke, C., Fierens, F., CAMP, EMEP, 2025, Nitrogen_dioxide at Eupen, data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/BWA3-9SZQ" />
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  <attribute name="ebas_file_creation" value="2026-03-23T09:36:16.683489Z" />
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  <attribute name="ebas_startdate" value="2013-01-01T00:00:00.000000Z" />
  <attribute name="ebas_revision_date" value="2025-10-15T10:21:00.238055Z" />
  <attribute name="ebas_statistics" value="arithmetic mean" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="11y" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_station_code" value="BE0032R" />
  <attribute name="ebas_platform_code" value="BE0032S" />
  <attribute name="ebas_station_name" value="Eupen" />
  <attribute name="ebas_station_latitude" type="double" value="50.629421" />
  <attribute name="ebas_station_longitude" type="double" value="6.001019" />
  <attribute name="ebas_station_altitude" value="295.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_component" value="nitrogen_dioxide" />
  <attribute name="ebas_unit" value="ug N/m3" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="BE02L" />
  <attribute name="ebas_instrument_type" value="chemiluminescence_photolytic" />
  <attribute name="ebas_instrument_name" value="chemilum_h_0032" />
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  <attribute name="Metadata_Conventions" value="Unidata Dataset Discovery v1.0" />
  <attribute name="geospatial_lat_units" value="degrees_north" />
  <attribute name="geospatial_lon_units" value="degrees_east" />
  <attribute name="standard_name_vocabulary" value="CF-1.7, ACDD-1.3" />
  <attribute name="history" value="None" />
  <attribute name="creator_url" value="ebas.nilu.no" />
  <attribute name="_CoordSysBuilder" value="ucar.nc2.internal.dataset.conv.CF1Convention" />
  <dimension name="time" length="87648" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="10" />
  <dimension name="nitrogen_dioxide_qc_flags" length="1" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2013-01-01T00:30:00Z" />
    <attribute name="time_coverage_end" value="2023-12-31T23:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="3959.0" />
    <attribute name="time_coverage_duration" value="P0Y0M4016DT23H0M0.000S" />
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  <group name="NCISOMetadata">
    <attribute name="metadata_creation" value="2026-05-18" />
    <attribute name="nciso_version" value="2.4.8" />
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  <variable name="time_bnds" shape="time tbnds" type="double">
    <attribute name="long_name" value="time bounds for measurement" />
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    <attribute name="long_name" value="time bounds for ebas metadata intervals" />
  </variable>
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    <attribute name="standard_name" value="mass_concentration_of_nitrogen_dioxide_expressed_as_nitrogen_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="nitrogen_dioxide_qc nitrogen_dioxide_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="2025-10-15T10:21:00.238055Z" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_station_code" value="BE0032R" />
    <attribute name="ebas_platform_code" value="BE0032S" />
    <attribute name="ebas_station_name" value="Eupen" />
    <attribute name="ebas_station_latitude" type="double" value="50.629421" />
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    <attribute name="ebas_station_altitude" value="295.0 m" />
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    <attribute name="ebas_component" value="nitrogen_dioxide" />
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    <attribute name="actris_variable_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/nitrogendioxidemassconcentration" />
    <attribute name="actris_variable_preferred_term" value="nitrogen dioxide mass concentration" />
    <attribute name="actris_matrix_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/gasphase" />
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    <attribute name="actris_constraints_preferred_term" value="expressed as nitrogen" />
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    <attribute name="actris_instrument_type_uri" value="https://vocabulary.actris.nilu.no/actris_vocab/chemiluminescencedetector-photolyticalconverter" />
    <attribute name="actris_instrument_type_preferred_term" value="chemiluminescence detector, photolytical converter" />
    <attribute name="actris_temporal_resolution" value="PT1H" />
    <attribute name="actris_access_restriction" type="long" value="0" />
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  <variable name="nitrogen_dioxide_qc" shape="nitrogen_dioxide_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" />
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  <variable name="nitrogen_dioxide_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 1900-01-01T00:00:00Z" />
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    <attribute name="_CoordinateAxisType" value="Time" />
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    <attribute name="long_name" value="time of ebas metadata intervals" />
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