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  <attribute name="Conventions" value="CF-1.8, ACDD-1.3" />
  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Ozone at Longmont Union Reservoir" />
  <attribute name="keywords" value="mass_concentration_of_ozone_in_air, Longmont Union Reservoir, air, mole_fraction_of_ozone_in_air, ozone, Independent, US0107R" />
  <attribute name="id" value="US0107R.20191213210000.20260608092348.uv_abs.ozone.air.5y.1h.US17L_49C12_LUR.US17L_1O3.lev2.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="Independent" />
  <attribute name="acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the framework: Independent. The monitoring program was funded and the data were made publicly available by the City of Longmont, Colorado, USA." />
  <attribute name="doi" value="https://doi.org/10.48597/STRZ-NMMN" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Helmig, D., Independent, 2026, Ozone at Longmont Union Reservoir, data hosted by EBAS at NILU, Part of DOI: https://doi.org/10.48597/STRZ-NMMN" />
  <attribute name="summary" value="Ozone at Longmont Union Reservoir. These measurements are gathered as a part of the following projects Independent and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: ozone in air (mole_fraction_of_ozone_in_air), ozone in air (mass_concentration_of_ozone_in_air), ozone in air (mole_fraction_of_ozone_in_air), ozone in air (mass_concentration_of_ozone_in_air), ozone in air (mole_fraction_of_ozone_in_air), ozone in air (mass_concentration_of_ozone_in_air), ozone in air (mole_fraction_of_ozone_in_air), ozone in air (mass_concentration_of_ozone_in_air)" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, 2820 Lafayette Drive, 80305, Boulder, USA" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2026-06-08T09:23:48 UTC" />
  <attribute name="date_metadata_modified" value="2026-06-08T09:23:48 UTC" />
  <attribute name="creator_name" value="Detlev Helmig" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="dh.bouldair@gmail.com" />
  <attribute name="creator_institution" value="&quot;Boulder Atmosphere Innovation Research LLC, Boulder AIR&quot;" />
  <attribute name="contributor_name" value="Detlev Helmig" />
  <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/" />
  <attribute name="geospatial_bounds" value="POINT Z (40.1762 -105.0477 1514.0)" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="geospatial_lat_min" type="double" value="40.1762" />
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  <attribute name="geospatial_lon_max" type="double" value="-105.0477" />
  <attribute name="geospatial_vertical_min" type="double" value="1514.0" />
  <attribute name="geospatial_vertical_max" type="double" value="1514.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="time_coverage_start" value="2019-12-13T21:00:00 UTC" />
  <attribute name="time_coverage_end" value="2024-12-31T23:00:00 UTC" />
  <attribute name="time_coverage_duration" value="P0005-00-18T02:00:00" />
  <attribute name="time_coverage_resolution" value="P0000-00-00T01:00:00" />
  <attribute name="timezone" value="UTC" />
  <attribute name="ebas_data_definition" value="EBAS_1.1" />
  <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="ebas_citation" value="Helmig, D., Independent, 2026, Ozone at Longmont Union Reservoir, data hosted by EBAS at NILU, Part of DOI: https://doi.org/10.48597/STRZ-NMMN" />
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  <attribute name="ebas_resolution_code" value="1h" />
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  <attribute name="ebas_orig_time_res" value="1mn" />
  <attribute name="ebas_station_code" value="US0107R" />
  <attribute name="ebas_platform_code" value="US0107S" />
  <attribute name="ebas_station_name" value="Longmont Union Reservoir" />
  <attribute name="ebas_station_state_province" value="CO" />
  <attribute name="ebas_station_land_use" value="Agricultural" />
  <attribute name="ebas_station_setting" value="Suburban" />
  <attribute name="ebas_station_latitude" value="40.1762" />
  <attribute name="ebas_station_longitude" value="-105.0477" />
  <attribute name="ebas_station_altitude" value="1514.0 m" />
  <attribute name="ebas_measurement_height" value="8.6 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_component" value="ozone" />
  <attribute name="ebas_matrix" value="air" />
  <attribute name="ebas_laboratory_code" value="US17L" />
  <attribute name="ebas_instrument_type" value="uv_abs" />
  <attribute name="ebas_instrument_name" value="49C12_LUR" />
  <attribute name="ebas_instrument_manufacturer" value="Thermo" />
  <attribute name="ebas_instrument_model" value="49C" />
  <attribute name="ebas_instrument_serial_number" value="49C-64432-344" />
  <attribute name="ebas_method_ref" value="US17L_1O3" />
  <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
  <attribute name="ebas_inlet_tube_material" value="Teflon" />
  <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
  <attribute name="ebas_inlet_tube_length" value="11.0 m" />
  <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
  <attribute name="ebas_flow_rate" value="1.3 l/min" />
  <attribute name="ebas_filter_description" value="5 micron Teflon" />
  <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
  <attribute name="ebas_zero_span_check_type" value="automatic" />
  <attribute name="ebas_zero_span_check_interval" value="1d" />
  <attribute name="ebas_humidity_temperaure_control" value="None" />
  <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
  <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
  <attribute name="ebas_framework_acronym" value="Independent" />
  <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
  <attribute name="ebas_framework_description" value="Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;Independent&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use" />
  <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
  <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
  <attribute name="ebas_originator" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
  <attribute name="ebas_submitter" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
  <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the framework: Independent. The monitoring program was funded and the data were made publicly available by the City of Longmont, Colorado, USA." />
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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="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;Helmig, D., Independent, 2026, Ozone at Longmont Union Reservoir, data hosted by EBAS at NILU, Part of DOI: https://doi.org/10.48597/STRZ-NMMN&quot;,&#xA;    &quot;Set type code&quot;: &quot;TI&quot;,&#xA;    &quot;Timezone&quot;: &quot;UTC&quot;,&#xA;    &quot;File name&quot;: &quot;US0107R.20191213210000.20260608092348.uv_abs.ozone.air.5y.1h.US17L_49C12_LUR.US17L_1O3.lev2.nc&quot;,&#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/STRZ-NMMN&quot;,&#xA;    &quot;File creation&quot;: &quot;2026-06-08T16:49:26.200195 UTC&quot;,&#xA;    &quot;Export state&quot;: &quot;2026-06-08T14:25:03.051841 UTC&quot;,&#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;,&#xA;    &quot;Startdate&quot;: &quot;20191213210000&quot;,&#xA;    &quot;Revision date&quot;: &quot;20260608092348&quot;,&#xA;    &quot;Version&quot;: &quot;1&quot;,&#xA;    &quot;Version description&quot;: &quot;initial revision,manually inspected&quot;,&#xA;    &quot;Data level&quot;: &quot;2&quot;,&#xA;    &quot;Period code&quot;: &quot;5y&quot;,&#xA;    &quot;Resolution code&quot;: &quot;1h&quot;,&#xA;    &quot;Sample duration&quot;: &quot;1h&quot;,&#xA;    &quot;Orig. time res.&quot;: &quot;1mn&quot;,&#xA;    &quot;Station code&quot;: &quot;US0107R&quot;,&#xA;    &quot;Platform code&quot;: &quot;US0107S&quot;,&#xA;    &quot;Station name&quot;: &quot;Longmont Union Reservoir&quot;,&#xA;    &quot;Station state/province&quot;: &quot;CO&quot;,&#xA;    &quot;Station land use&quot;: &quot;Agricultural&quot;,&#xA;    &quot;Station setting&quot;: &quot;Suburban&quot;,&#xA;    &quot;Station latitude&quot;: &quot;40.1762&quot;,&#xA;    &quot;Station longitude&quot;: &quot;-105.0477&quot;,&#xA;    &quot;Station altitude&quot;: &quot;1514.0 m&quot;,&#xA;    &quot;Measurement height&quot;: &quot;8.6 m&quot;,&#xA;    &quot;Regime&quot;: &quot;IMG&quot;,&#xA;    &quot;Component&quot;: &quot;ozone&quot;,&#xA;    &quot;Matrix&quot;: &quot;air&quot;,&#xA;    &quot;Laboratory code&quot;: &quot;US17L&quot;,&#xA;    &quot;Instrument type&quot;: &quot;uv_abs&quot;,&#xA;    &quot;Instrument name&quot;: &quot;49C12_LUR&quot;,&#xA;    &quot;Instrument manufacturer&quot;: &quot;Thermo&quot;,&#xA;    &quot;Instrument model&quot;: &quot;49C&quot;,&#xA;    &quot;Instrument serial number&quot;: &quot;49C-64432-344&quot;,&#xA;    &quot;Method ref&quot;: &quot;US17L_1O3&quot;,&#xA;    &quot;Standard method&quot;: &quot;SOP=GAW_209(2013)&quot;,&#xA;    &quot;Inlet type&quot;: &quot;Hat or hood&quot;,&#xA;    &quot;Inlet description&quot;: &quot;Downward facing Teflon filter holder with 5 micron filter&quot;,&#xA;    &quot;Inlet tube material&quot;: &quot;Teflon&quot;,&#xA;    &quot;Inlet tube inner diameter&quot;: &quot;3.969 mm&quot;,&#xA;    &quot;Inlet tube length&quot;: &quot;11.0 m&quot;,&#xA;    &quot;Maintenance description&quot;: &quot;quarterly calibrations and linearity checks, inlet filter changed every 2 months&quot;,&#xA;    &quot;Flow rate&quot;: &quot;1.3 l/min&quot;,&#xA;    &quot;Filter description&quot;: &quot;5 micron Teflon&quot;,&#xA;    &quot;Filter conditioning&quot;: &quot;298.0 K, 0.0 %RH, 2.0 h&quot;,&#xA;    &quot;Zero/span check type&quot;: &quot;automatic&quot;,&#xA;    &quot;Zero/span check interval&quot;: &quot;1d&quot;,&#xA;    &quot;Humidity/temperature control&quot;: &quot;None&quot;,&#xA;    &quot;Absorption cross section&quot;: &quot;Hearn, 1961&quot;,&#xA;    &quot;Organization&quot;: &quot;US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA&quot;,&#xA;    &quot;Framework acronym&quot;: &quot;Independent&quot;,&#xA;    &quot;Framework name&quot;: &quot;Independent data made available without official affiliation to another existing EBAS project/framework&quot;,&#xA;    &quot;Framework description&quot;: &quot;Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of \&quot;Independent\&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use&quot;,&#xA;    &quot;Framework contact name&quot;: &quot;Kjetil Tørseth&quot;,&#xA;    &quot;Framework contact email&quot;: &quot;kt@nilu.no&quot;,&#xA;    &quot;Originator&quot;: &quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;,&#xA;    &quot;Submitter&quot;: &quot;Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651&quot;,&#xA;    &quot;Acknowledgement&quot;: &quot;Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. 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  <attribute name="creator_url" value="ebas.nilu.no" />
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  <dimension name="metadata_time" length="2" />
  <dimension name="ozone_nmol_per_mol_amean_qc_flags" length="1" />
  <dimension name="ozone_ug_per_m3_amean_qc_flags" length="1" />
  <dimension name="ozone_nmol_per_mol_max_qc_flags" length="1" />
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  <dimension name="ozone_ug_per_m3_min_qc_flags" length="1" />
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    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0107R" />
    <attribute name="ebas_platform_code" value="US0107S" />
    <attribute name="ebas_station_name" value="Longmont Union Reservoir" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Agricultural" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" value="40.1762" />
    <attribute name="ebas_station_longitude" value="-105.0477" />
    <attribute name="ebas_station_altitude" value="1514.0 m" />
    <attribute name="ebas_measurement_height" value="8.6 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C12_LUR" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49C-64432-344" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
    <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
    <attribute name="ebas_inlet_tube_material" value="Teflon" />
    <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
    <attribute name="ebas_inlet_tube_length" value="11.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="2.0 ug/m3" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;Independent&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_submitter" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the framework: Independent. The monitoring program was funded and the data were made publicly available by the City of Longmont, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953." />
  </variable>
  <variable name="ozone_ug_per_m3_amean_qc" shape="ozone_ug_per_m3_amean_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="ozone_ug_per_m3_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="ozone_nmol_per_mol_max" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ozone_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="ozone_nmol_per_mol_max_qc ozone_nmol_per_mol_max_ebasmetadata" />
    <attribute name="cell_methods" value="time: maximum" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20260608092348" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="maximum" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0107R" />
    <attribute name="ebas_platform_code" value="US0107S" />
    <attribute name="ebas_station_name" value="Longmont Union Reservoir" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Agricultural" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" value="40.1762" />
    <attribute name="ebas_station_longitude" value="-105.0477" />
    <attribute name="ebas_station_altitude" value="1514.0 m" />
    <attribute name="ebas_measurement_height" value="8.6 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C12_LUR" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49C-64432-344" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
    <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
    <attribute name="ebas_inlet_tube_material" value="Teflon" />
    <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
    <attribute name="ebas_inlet_tube_length" value="11.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_detection_limit" value="1.0 nmol/mol" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;Independent&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_submitter" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the framework: Independent. The monitoring program was funded and the data were made publicly available by the City of Longmont, Colorado, USA." />
  </variable>
  <variable name="ozone_nmol_per_mol_max_qc" shape="ozone_nmol_per_mol_max_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="ozone_nmol_per_mol_max_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="ozone_ug_per_m3_max" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_ozone_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="ozone_ug_per_m3_max_qc ozone_ug_per_m3_max_ebasmetadata" />
    <attribute name="cell_methods" value="time: maximum" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20260608092348" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="maximum" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0107R" />
    <attribute name="ebas_platform_code" value="US0107S" />
    <attribute name="ebas_station_name" value="Longmont Union Reservoir" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Agricultural" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" value="40.1762" />
    <attribute name="ebas_station_longitude" value="-105.0477" />
    <attribute name="ebas_station_altitude" value="1514.0 m" />
    <attribute name="ebas_measurement_height" value="8.6 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C12_LUR" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49C-64432-344" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
    <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
    <attribute name="ebas_inlet_tube_material" value="Teflon" />
    <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
    <attribute name="ebas_inlet_tube_length" value="11.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="2.0 ug/m3" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;Independent&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_submitter" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the framework: Independent. The monitoring program was funded and the data were made publicly available by the City of Longmont, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953." />
  </variable>
  <variable name="ozone_ug_per_m3_max_qc" shape="ozone_ug_per_m3_max_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="ozone_ug_per_m3_max_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="ozone_nmol_per_mol_min" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ozone_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="ozone_nmol_per_mol_min_qc ozone_nmol_per_mol_min_ebasmetadata" />
    <attribute name="cell_methods" value="time: minimum" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20260608092348" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="minimum" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0107R" />
    <attribute name="ebas_platform_code" value="US0107S" />
    <attribute name="ebas_station_name" value="Longmont Union Reservoir" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Agricultural" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" value="40.1762" />
    <attribute name="ebas_station_longitude" value="-105.0477" />
    <attribute name="ebas_station_altitude" value="1514.0 m" />
    <attribute name="ebas_measurement_height" value="8.6 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C12_LUR" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49C-64432-344" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
    <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
    <attribute name="ebas_inlet_tube_material" value="Teflon" />
    <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
    <attribute name="ebas_inlet_tube_length" value="11.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_detection_limit" value="1.0 nmol/mol" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;Independent&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_submitter" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the framework: Independent. The monitoring program was funded and the data were made publicly available by the City of Longmont, Colorado, USA." />
  </variable>
  <variable name="ozone_nmol_per_mol_min_qc" shape="ozone_nmol_per_mol_min_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="ozone_nmol_per_mol_min_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="ozone_ug_per_m3_min" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_ozone_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="ozone_ug_per_m3_min_qc ozone_ug_per_m3_min_ebasmetadata" />
    <attribute name="cell_methods" value="time: minimum" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20260608092348" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="minimum" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0107R" />
    <attribute name="ebas_platform_code" value="US0107S" />
    <attribute name="ebas_station_name" value="Longmont Union Reservoir" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Agricultural" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" value="40.1762" />
    <attribute name="ebas_station_longitude" value="-105.0477" />
    <attribute name="ebas_station_altitude" value="1514.0 m" />
    <attribute name="ebas_measurement_height" value="8.6 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C12_LUR" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49C-64432-344" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
    <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
    <attribute name="ebas_inlet_tube_material" value="Teflon" />
    <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
    <attribute name="ebas_inlet_tube_length" value="11.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="2.0 ug/m3" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;Independent&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_submitter" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the framework: Independent. The monitoring program was funded and the data were made publicly available by the City of Longmont, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953." />
  </variable>
  <variable name="ozone_ug_per_m3_min_qc" shape="ozone_ug_per_m3_min_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="ozone_ug_per_m3_min_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="ozone_nmol_per_mol_stddev" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mole_fraction_of_ozone_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="nmol/mol" />
    <attribute name="ancillary_variables" value="ozone_nmol_per_mol_stddev_qc ozone_nmol_per_mol_stddev_ebasmetadata" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20260608092348" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0107R" />
    <attribute name="ebas_platform_code" value="US0107S" />
    <attribute name="ebas_station_name" value="Longmont Union Reservoir" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Agricultural" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" value="40.1762" />
    <attribute name="ebas_station_longitude" value="-105.0477" />
    <attribute name="ebas_station_altitude" value="1514.0 m" />
    <attribute name="ebas_measurement_height" value="8.6 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
    <attribute name="ebas_unit" value="nmol/mol" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C12_LUR" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49C-64432-344" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
    <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
    <attribute name="ebas_inlet_tube_material" value="Teflon" />
    <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
    <attribute name="ebas_inlet_tube_length" value="11.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_detection_limit" value="1.0 nmol/mol" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;Independent&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_submitter" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the framework: Independent. The monitoring program was funded and the data were made publicly available by the City of Longmont, Colorado, USA." />
  </variable>
  <variable name="ozone_nmol_per_mol_stddev_qc" shape="ozone_nmol_per_mol_stddev_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="ozone_nmol_per_mol_stddev_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="ozone_ug_per_m3_stddev" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="mass_concentration_of_ozone_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="ug/m3" />
    <attribute name="ancillary_variables" value="ozone_ug_per_m3_stddev_qc ozone_ug_per_m3_stddev_ebasmetadata" />
    <attribute name="cell_methods" value="time: standard_deviation" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20260608092348" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="initial revision,manually inspected" />
    <attribute name="ebas_statistics" value="stddev" />
    <attribute name="ebas_data_level" value="2" />
    <attribute name="ebas_sample_duration" value="1h" />
    <attribute name="ebas_orig_time_res" value="1mn" />
    <attribute name="ebas_station_code" value="US0107R" />
    <attribute name="ebas_platform_code" value="US0107S" />
    <attribute name="ebas_station_name" value="Longmont Union Reservoir" />
    <attribute name="ebas_station_state_province" value="CO" />
    <attribute name="ebas_station_land_use" value="Agricultural" />
    <attribute name="ebas_station_setting" value="Suburban" />
    <attribute name="ebas_station_latitude" value="40.1762" />
    <attribute name="ebas_station_longitude" value="-105.0477" />
    <attribute name="ebas_station_altitude" value="1514.0 m" />
    <attribute name="ebas_measurement_height" value="8.6 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="ozone" />
    <attribute name="ebas_unit" value="ug/m3" />
    <attribute name="ebas_matrix" value="air" />
    <attribute name="ebas_laboratory_code" value="US17L" />
    <attribute name="ebas_instrument_type" value="uv_abs" />
    <attribute name="ebas_instrument_name" value="49C12_LUR" />
    <attribute name="ebas_instrument_manufacturer" value="Thermo" />
    <attribute name="ebas_instrument_model" value="49C" />
    <attribute name="ebas_instrument_serial_number" value="49C-64432-344" />
    <attribute name="ebas_method_ref" value="US17L_1O3" />
    <attribute name="ebas_standard_method" value="SOP=GAW_209(2013)" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_inlet_description" value="Downward facing Teflon filter holder with 5 micron filter" />
    <attribute name="ebas_inlet_tube_material" value="Teflon" />
    <attribute name="ebas_inlet_tube_inner_diameter" value="3.969 mm" />
    <attribute name="ebas_inlet_tube_length" value="11.0 m" />
    <attribute name="ebas_maintenance_description" value="quarterly calibrations and linearity checks, inlet filter changed every 2 months" />
    <attribute name="ebas_flow_rate" value="1.3 l/min" />
    <attribute name="ebas_filter_description" value="5 micron Teflon" />
    <attribute name="ebas_filter_conditioning" value="298.0 K, 0.0 %RH, 2.0 h" />
    <attribute name="ebas_zero_span_check_type" value="automatic" />
    <attribute name="ebas_zero_span_check_interval" value="1d" />
    <attribute name="ebas_humidity_temperaure_control" value="None" />
    <attribute name="ebas_volume_std_temperature" value="293.15 K" />
    <attribute name="ebas_volume_std_pressure" value="1013.25 hPa" />
    <attribute name="ebas_detection_limit" value="2.0 ug/m3" />
    <attribute name="ebas_absorption_cross_section" value="Hearn, 1961" />
    <attribute name="ebas_organization" value="US17L, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, USA" />
    <attribute name="ebas_framework_acronym" value="Independent" />
    <attribute name="ebas_framework_name" value="Independent data made available without official affiliation to another existing EBAS project/framework" />
    <attribute name="ebas_framework_description" value="Project established to allow reporting of data which do not have an affiliation to frameworks in EBAS. Users of &quot;Independent&quot; data should investigate the associated metadata and take contact with data originators regarding matters associated to data use" />
    <attribute name="ebas_framework_contact_name" value="Kjetil Tørseth" />
    <attribute name="ebas_framework_contact_email" value="kt@nilu.no" />
    <attribute name="ebas_originator" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_submitter" value="Helmig, Detlev, dh.bouldair@gmail.com, Boulder Atmosphere Innovation Research LLC, Boulder AIR, , 2820 Lafayette Drive, , 80305, Boulder, United States of America, ORCID=0000-0003-1612-1651" />
    <attribute name="ebas_acknowledgement" value="Data used in this &lt;study/report/figure/etc.&gt; were accessed from EBAS (https://ebas.nilu.no) hosted by NILU. Specifically, the use included data affiliated with the framework: Independent. The monitoring program was funded and the data were made publicly available by the City of Longmont, Colorado, USA." />
    <attribute name="ebas_comment" value="Data are provided for informational purposes only without any representations as to accuracy or fitness for a particular purpose. -- Data converted on import into EBAS from 'nmol/mol' to 'ug/m3' at 293.15 K, 1013.25 hPa, conversion factor 1.9953." />
  </variable>
  <variable name="ozone_ug_per_m3_stddev_qc" shape="ozone_ug_per_m3_stddev_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="ozone_ug_per_m3_stddev_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>
