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  <attribute name="featureType" value="timeSeries" />
  <attribute name="title" value="Particle_number_concentration at Appalachian State University, Boone (NC)" />
  <attribute name="keywords" value="particle_number_concentration, aerosol, Appalachian State University, Boone (NC), GAW-WDCA, US3446C, NOAA-ESRL, number_concentration_of_particles_in_dry_aerosol_particles_in_air" />
  <attribute name="id" value="PN37-5AJE.nc" />
  <attribute name="naming_authority" value="EBAS" />
  <attribute name="project" value="GAW-WDCA, NOAA-ESRL" />
  <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 frameworks: GAW-WDCA, NOAA-ESRL. Request acknowledgement details from data originator" />
  <attribute name="doi" value="https://doi.org/10.48597/PN37-5AJE" />
  <attribute name="license" value="https://creativecommons.org/licenses/by/4.0/" />
  <attribute name="citation" value="Sherman, J., 2020, Particle_number_concentration at Appalachian State University, Boone (NC), data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/PN37-5AJE" />
  <attribute name="summary" value="Particle_number_concentration at Appalachian State University, Boone (NC). These measurements are gathered as a part of the following projects GAW-WDCA, NOAA-ESRL and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: particle_number_concentration in aerosol (number_concentration_of_particles_in_dry_aerosol_particles_in_air), particle_number_concentration in aerosol (number_concentration_of_particles_in_dry_aerosol_particles_in_air), particle_number_concentration in aerosol (number_concentration_of_particles_in_dry_aerosol_particles_in_air)" />
  <attribute name="source" value="surface observation" />
  <attribute name="institution" value="US10L, Appalachian State University, AppalAIR, Appalachian Atmospheric Interdisciplinary Research Facility, AppalAIR, c/o James Sherman - CAP Building Room 325, CAP Building Room 325, 28608, Boone NC, United States" />
  <attribute name="processing_level" value="processing_level_test" />
  <attribute name="date_created" value="2020-02-16T19:08:52 UTC" />
  <attribute name="date_metadata_modified" value="2020-02-16T19:08:52 UTC" />
  <attribute name="creator_name" value="James Sherman" />
  <attribute name="creator_type" value="person" />
  <attribute name="creator_email" value="" />
  <attribute name="creator_institution" value="" />
  <attribute name="contributor_name" value="James Sherman" />
  <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 (36.2 -81.7 1100.0)" />
  <attribute name="geospatial_bounds_crs" value="EPSG:4979" />
  <attribute name="geospatial_lat_min" type="double" value="36.2" />
  <attribute name="geospatial_lat_max" type="double" value="36.2" />
  <attribute name="geospatial_lon_min" type="double" value="-81.7" />
  <attribute name="geospatial_lon_max" type="double" value="-81.7" />
  <attribute name="geospatial_vertical_min" type="double" value="1100.0" />
  <attribute name="geospatial_vertical_max" type="double" value="1100.0" />
  <attribute name="geospatial_vertical_positive" value="up" />
  <attribute name="time_coverage_start" value="2016-08-17T00:00:00 UTC" />
  <attribute name="time_coverage_end" value="2017-01-01T00:00:00 UTC" />
  <attribute name="time_coverage_duration" value="P0000-04-15T00:00:00" />
  <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="Sherman, J., 2020, Particle_number_concentration at Appalachian State University, Boone (NC), data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/PN37-5AJE" />
  <attribute name="ebas_set_type_code" value="TU" />
  <attribute name="ebas_timezone" value="UTC" />
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  <attribute name="ebas_file_creation" value="2024-02-21T08:34:14.786308 UTC" />
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  <attribute name="ebas_startdate" value="20160817000000" />
  <attribute name="ebas_revision_date" value="20200216190852" />
  <attribute name="ebas_version" value="1" />
  <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4678" />
  <attribute name="ebas_data_level" value="2" />
  <attribute name="ebas_period_code" value="5mo" />
  <attribute name="ebas_resolution_code" value="1h" />
  <attribute name="ebas_sample_duration" value="1h" />
  <attribute name="ebas_orig_time_res" value="1mn" />
  <attribute name="ebas_station_code" value="US3446C" />
  <attribute name="ebas_platform_code" value="US3446S" />
  <attribute name="ebas_station_name" value="Appalachian State University, Boone (NC)" />
  <attribute name="ebas_station_latitude" value="36.2" />
  <attribute name="ebas_station_longitude" value="-81.7" />
  <attribute name="ebas_station_altitude" value="1100.0 m" />
  <attribute name="ebas_measurement_height" value="10.0 m" />
  <attribute name="ebas_regime" value="IMG" />
  <attribute name="ebas_laboratory_code" value="US10L" />
  <attribute name="ebas_instrument_type" value="cpc" />
  <attribute name="ebas_instrument_name" value="TSI_3010_APP" />
  <attribute name="ebas_instrument_manufacturer" value="TSI" />
  <attribute name="ebas_instrument_model" value="3010" />
  <attribute name="ebas_instrument_serial_number" value="2217" />
  <attribute name="ebas_method_ref" value="US10L_cpc_ref" />
  <attribute name="ebas_inlet_type" value="Hat or hood" />
  <attribute name="ebas_humidity_temperaure_control" value="Heating to 40% RH, limit 40 deg. C" />
  <attribute name="ebas_volume_std_temperature" value="instrument internal" />
  <attribute name="ebas_volume_std_pressure" value="instrument internal" />
  <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
  <attribute name="ebas_zero_negative_values" value="Zero values may appear due to statistical variations at very low concentrations" />
  <attribute name="ebas_organization" value="US10L, &quot;Appalachian State University, AppalAIR, Appalachian Atmospheric Interdisciplinary Research Facility&quot;, AppalAIR, , &quot;c/o James Sherman - CAP Building Room 325, CAP Building Room 325, 28608, Boone NC, United States&quot;, , , , " />
  <attribute name="ebas_framework_acronym" value="GAW-WDCA, NOAA-ESRL" />
  <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, Markus Fiebig" />
  <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
  <attribute name="ebas_originator" value="Sherman, James, , , , , , , , , " />
  <attribute name="ebas_submitter" value="Sherman, James, , , , , , , , , " />
  <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 frameworks: GAW-WDCA, NOAA-ESRL. Request acknowledgement details from data originator" />
  <attribute name="ebas_comment" value="Adjustments to STP use Sample-T=12C, Sample-P=900hPa" />
  <attribute name="_NCProperties" value="version=2,netcdf=4.9.0,hdf5=1.12.2" />
  <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;Sherman, J., 2020, Particle_number_concentration at Appalachian State University, Boone (NC), data hosted by EBAS at NILU, DOI: https://doi.org/10.48597/PN37-5AJE&quot;,&#xA;    &quot;Set type code&quot;: &quot;TU&quot;,&#xA;    &quot;Timezone&quot;: &quot;UTC&quot;,&#xA;    &quot;File name&quot;: &quot;PN37-5AJE.nc&quot;,&#xA;    &quot;Represents DOI&quot;: &quot;https://doi.org/10.48597/PN37-5AJE&quot;,&#xA;    &quot;Contains data from DOI&quot;: &quot;https://doi.org/10.48597/PN37-5AJE&quot;,&#xA;    &quot;File creation&quot;: &quot;2024-02-21T08:34:14.786308 UTC&quot;,&#xA;    &quot;Export state&quot;: &quot;2017-06-23T08:14:14.373000 UTC&quot;,&#xA;    &quot;Export filter&quot;: &quot;exclude-900,exclude-invalid&quot;,&#xA;    &quot;Startdate&quot;: &quot;20160817000000&quot;,&#xA;    &quot;Revision date&quot;: &quot;20200216190852&quot;,&#xA;    &quot;Version&quot;: &quot;1&quot;,&#xA;    &quot;Version description&quot;: &quot;Version numbering not tracked, generated by data.aggregate.ebas r4678&quot;,&#xA;    &quot;Data level&quot;: &quot;2&quot;,&#xA;    &quot;Period code&quot;: &quot;5mo&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;US3446C&quot;,&#xA;    &quot;Platform code&quot;: &quot;US3446S&quot;,&#xA;    &quot;Station name&quot;: &quot;Appalachian State University, Boone (NC)&quot;,&#xA;    &quot;Station latitude&quot;: &quot;36.2&quot;,&#xA;    &quot;Station longitude&quot;: &quot;-81.7&quot;,&#xA;    &quot;Station altitude&quot;: &quot;1100.0 m&quot;,&#xA;    &quot;Measurement height&quot;: &quot;10.0 m&quot;,&#xA;    &quot;Regime&quot;: &quot;IMG&quot;,&#xA;    &quot;Laboratory code&quot;: &quot;US10L&quot;,&#xA;    &quot;Instrument type&quot;: &quot;cpc&quot;,&#xA;    &quot;Instrument name&quot;: &quot;TSI_3010_APP&quot;,&#xA;    &quot;Instrument manufacturer&quot;: &quot;TSI&quot;,&#xA;    &quot;Instrument model&quot;: &quot;3010&quot;,&#xA;    &quot;Instrument serial number&quot;: &quot;2217&quot;,&#xA;    &quot;Method ref&quot;: &quot;US10L_cpc_ref&quot;,&#xA;    &quot;Inlet type&quot;: &quot;Hat or hood&quot;,&#xA;    &quot;Humidity/temperature control&quot;: &quot;Heating to 40% RH, limit 40 deg. C&quot;,&#xA;    &quot;Volume std. temperature&quot;: &quot;instrument internal&quot;,&#xA;    &quot;Volume std. pressure&quot;: &quot;instrument internal&quot;,&#xA;    &quot;Zero/negative values code&quot;: &quot;Zero/negative possible&quot;,&#xA;    &quot;Zero/negative values&quot;: &quot;Zero values may appear due to statistical variations at very low concentrations&quot;,&#xA;    &quot;Organization&quot;: &quot;US10L, \&quot;Appalachian State University, AppalAIR, Appalachian Atmospheric Interdisciplinary Research Facility\&quot;, AppalAIR, , \&quot;c/o James Sherman - CAP Building Room 325, CAP Building Room 325, 28608, Boone NC, United States\&quot;, , , , &quot;,&#xA;    &quot;Framework acronym&quot;: &quot;GAW-WDCA, NOAA-ESRL&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, Markus Fiebig&quot;,&#xA;    &quot;Framework contact email&quot;: &quot;Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no&quot;,&#xA;    &quot;Originator&quot;: &quot;Sherman, James, , , , , , , , , &quot;,&#xA;    &quot;Submitter&quot;: &quot;Sherman, James, , , , , , , , , &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. Specifically, the use included data affiliated with the frameworks: GAW-WDCA, NOAA-ESRL. Request acknowledgement details from data originator&quot;,&#xA;    &quot;Comment&quot;: &quot;Adjustments to STP use Sample-T=12C, Sample-P=900hPa&quot;&#xA;}" />
  <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="3288" />
  <dimension name="tbnds" length="2" />
  <dimension name="metadata_time" length="1" />
  <dimension name="pressure_qc_flags" length="2" />
  <dimension name="temperature_qc_flags" length="2" />
  <dimension name="particle_number_concentration_amean_qc_flags" length="2" />
  <dimension name="particle_number_concentration_prec1587_qc_flags" length="2" />
  <dimension name="particle_number_concentration_perc8413_qc_flags" length="2" />
  <group name="CFMetadata">
    <attribute name="time_coverage_start" value="2016-08-17T00:30:00Z" />
    <attribute name="time_coverage_end" value="2016-12-31T23:30:00Z" />
    <attribute name="time_coverage_units" value="seconds" />
    <attribute name="time_coverage_resolution" value="3600.0" />
    <attribute name="time_coverage_duration" value="P0Y0M136DT23H0M0.000S" />
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    <attribute name="metadata_creation" value="2026-04-09" />
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    <attribute name="long_name" value="time bounds for measurement" />
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    <attribute name="long_name" value="time bounds for ebas metadata intervals" />
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    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="hPa" />
    <attribute name="ancillary_variables" value="pressure_qc pressure_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="20190204112743" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4678" />
    <attribute name="ebas_statistics" value="arithmetic mean" />
    <attribute name="ebas_data_level" value="2" />
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    <attribute name="ebas_orig_time_res" value="1mn" />
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    <attribute name="ebas_station_name" value="Appalachian State University, Boone (NC)" />
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    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="K" />
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    <attribute name="cell_methods" value="time: mean" />
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    <attribute name="ebas_station_latitude" value="36.2" />
    <attribute name="ebas_station_longitude" value="-81.7" />
    <attribute name="ebas_station_altitude" value="1100.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="temperature" />
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    <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="particle_number_concentration_amean" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="number_concentration_of_particles_in_dry_aerosol_particles_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="1/cm3" />
    <attribute name="ancillary_variables" value="particle_number_concentration_amean_qc particle_number_concentration_amean_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="20200216190852" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4678" />
    <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="US3446C" />
    <attribute name="ebas_platform_code" value="US3446S" />
    <attribute name="ebas_station_name" value="Appalachian State University, Boone (NC)" />
    <attribute name="ebas_station_latitude" value="36.2" />
    <attribute name="ebas_station_longitude" value="-81.7" />
    <attribute name="ebas_station_altitude" value="1100.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="particle_number_concentration" />
    <attribute name="ebas_unit" value="1/cm3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="US10L" />
    <attribute name="ebas_instrument_type" value="cpc" />
    <attribute name="ebas_instrument_name" value="TSI_3010_APP" />
    <attribute name="ebas_instrument_manufacturer" value="TSI" />
    <attribute name="ebas_instrument_model" value="3010" />
    <attribute name="ebas_instrument_serial_number" value="2217" />
    <attribute name="ebas_method_ref" value="US10L_cpc_ref" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Heating to 40% RH, limit 40 deg. C" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_detection_limit" value="0.0 1/cm3" />
    <attribute name="ebas_detection_limit_expl" value="Determined only by instrument counting statistics, no detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="US10L, &quot;Appalachian State University, AppalAIR, Appalachian Atmospheric Interdisciplinary Research Facility&quot;, AppalAIR, , &quot;c/o James Sherman - CAP Building Room 325, CAP Building Room 325, 28608, Boone NC, United States&quot;, , , , " />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA, NOAA-ESRL" />
    <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, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Sherman, James, , , , , , , , , " />
    <attribute name="ebas_submitter" value="Sherman, James, , , , , , , , , " />
    <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 frameworks: GAW-WDCA, NOAA-ESRL. Request acknowledgement details from data originator" />
    <attribute name="ebas_comment" value="Adjustments to STP use Sample-T=12C, Sample-P=900hPa" />
  </variable>
  <variable name="particle_number_concentration_amean_qc" shape="particle_number_concentration_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="particle_number_concentration_amean_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="particle_number_concentration_prec1587" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="number_concentration_of_particles_in_dry_aerosol_particles_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="1/cm3" />
    <attribute name="ancillary_variables" value="particle_number_concentration_prec1587_qc particle_number_concentration_prec1587_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:15.87" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200216190852" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4678" />
    <attribute name="ebas_statistics" value="percentile:15.87" />
    <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="US3446C" />
    <attribute name="ebas_platform_code" value="US3446S" />
    <attribute name="ebas_station_name" value="Appalachian State University, Boone (NC)" />
    <attribute name="ebas_station_latitude" value="36.2" />
    <attribute name="ebas_station_longitude" value="-81.7" />
    <attribute name="ebas_station_altitude" value="1100.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="particle_number_concentration" />
    <attribute name="ebas_unit" value="1/cm3" />
    <attribute name="ebas_matrix" value="aerosol" />
    <attribute name="ebas_laboratory_code" value="US10L" />
    <attribute name="ebas_instrument_type" value="cpc" />
    <attribute name="ebas_instrument_name" value="TSI_3010_APP" />
    <attribute name="ebas_instrument_manufacturer" value="TSI" />
    <attribute name="ebas_instrument_model" value="3010" />
    <attribute name="ebas_instrument_serial_number" value="2217" />
    <attribute name="ebas_method_ref" value="US10L_cpc_ref" />
    <attribute name="ebas_inlet_type" value="Hat or hood" />
    <attribute name="ebas_humidity_temperaure_control" value="Heating to 40% RH, limit 40 deg. C" />
    <attribute name="ebas_volume_std_temperature" value="instrument internal" />
    <attribute name="ebas_volume_std_pressure" value="instrument internal" />
    <attribute name="ebas_detection_limit" value="0.0 1/cm3" />
    <attribute name="ebas_detection_limit_expl" value="Determined only by instrument counting statistics, no detection limit flag used" />
    <attribute name="ebas_zero_negative_values_code" value="Zero/negative possible" />
    <attribute name="ebas_zero_negative_values" value="Zero values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="US10L, &quot;Appalachian State University, AppalAIR, Appalachian Atmospheric Interdisciplinary Research Facility&quot;, AppalAIR, , &quot;c/o James Sherman - CAP Building Room 325, CAP Building Room 325, 28608, Boone NC, United States&quot;, , , , " />
    <attribute name="ebas_framework_acronym" value="GAW-WDCA, NOAA-ESRL" />
    <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, Markus Fiebig" />
    <attribute name="ebas_framework_contact_email" value="Markus.Fiebig@nilu.no, Markus.Fiebig@nilu.no" />
    <attribute name="ebas_originator" value="Sherman, James, , , , , , , , , " />
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    <attribute name="ebas_comment" value="Adjustments to STP use Sample-T=12C, Sample-P=900hPa" />
  </variable>
  <variable name="particle_number_concentration_prec1587_qc" shape="particle_number_concentration_prec1587_qc_flags time" type="int">
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    <attribute name="standard_name" value="status_flag" />
    <attribute name="missing_value" type="int" value="0" />
    <attribute name="units" value="1" />
  </variable>
  <variable name="particle_number_concentration_prec1587_ebasmetadata" shape="metadata_time" type="String">
    <attribute name="long_name" value="ebas metadata for different time intervals; json encoded" />
  </variable>
  <variable name="particle_number_concentration_perc8413" shape="time" type="double">
    <attribute name="_FillValue" type="double" value="NaN" />
    <attribute name="standard_name" value="number_concentration_of_particles_in_dry_aerosol_particles_in_air" />
    <attribute name="missing_value" type="double" value="NaN" />
    <attribute name="units" value="1/cm3" />
    <attribute name="ancillary_variables" value="particle_number_concentration_perc8413_qc particle_number_concentration_perc8413_ebasmetadata" />
    <attribute name="cell_methods" value="time: percentile:84.13" />
    <attribute name="ebas_data_license" value="https://creativecommons.org/licenses/by/4.0/" />
    <attribute name="ebas_revision_date" value="20200216190852" />
    <attribute name="ebas_version" value="1" />
    <attribute name="ebas_version_description" value="Version numbering not tracked, generated by data.aggregate.ebas r4678" />
    <attribute name="ebas_statistics" value="percentile:84.13" />
    <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="US3446C" />
    <attribute name="ebas_platform_code" value="US3446S" />
    <attribute name="ebas_station_name" value="Appalachian State University, Boone (NC)" />
    <attribute name="ebas_station_latitude" value="36.2" />
    <attribute name="ebas_station_longitude" value="-81.7" />
    <attribute name="ebas_station_altitude" value="1100.0 m" />
    <attribute name="ebas_measurement_height" value="10.0 m" />
    <attribute name="ebas_regime" value="IMG" />
    <attribute name="ebas_component" value="particle_number_concentration" />
    <attribute name="ebas_unit" value="1/cm3" />
    <attribute name="ebas_matrix" value="aerosol" />
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    <attribute name="ebas_instrument_type" value="cpc" />
    <attribute name="ebas_instrument_name" value="TSI_3010_APP" />
    <attribute name="ebas_instrument_manufacturer" value="TSI" />
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    <attribute name="ebas_instrument_serial_number" value="2217" />
    <attribute name="ebas_method_ref" value="US10L_cpc_ref" />
    <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" />
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    <attribute name="ebas_detection_limit_expl" value="Determined only by instrument counting statistics, no detection limit flag used" />
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    <attribute name="ebas_zero_negative_values" value="Zero values may appear due to statistical variations at very low concentrations" />
    <attribute name="ebas_organization" value="US10L, &quot;Appalachian State University, AppalAIR, Appalachian Atmospheric Interdisciplinary Research Facility&quot;, AppalAIR, , &quot;c/o James Sherman - CAP Building Room 325, CAP Building Room 325, 28608, Boone NC, United States&quot;, , , , " />
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    <attribute name="ebas_framework_contact_name" value="Markus Fiebig, Markus Fiebig" />
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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="particle_number_concentration_perc8413_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" />
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</netcdf>
