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        <Value value="US1810R, volume_scattering_coefficient_in_air_due_to_dried_aerosol_particles, aerosol_light_scattering_coefficient, Mammoth Cave National Park-Houchin Meadow, aerosol, GAW-WDCA, IMPROVE"/>
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    <Attribute name="geospatial_lat_units" type="String">
        <Value value="degrees_north"/>
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    <Attribute name="geospatial_bounds_crs" type="String">
        <Value value="EPSG:4979"/>
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    <Attribute name="timezone" type="String">
        <Value value="UTC"/>
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    <Attribute name="naming_authority" type="String">
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        <Value value="Ground based in situ observations of nephelometer at Mammoth Cave National Park-Houchin Meadow (US1810R)"/>
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    <Attribute name="creator_institution" type="String">
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        <Value value="P0000-00-00T01:00:00"/>
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    <Attribute name="summary" type="String">
        <Value value="Ground based in situ observations of nephelometer at Mammoth Cave National Park-Houchin Meadow (US1810R). These measurements are gathered as a part of the following projects GAW-WDCA, IMPROVE and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: aerosol_light_scattering_coefficient in aerosol (volume_scattering_coefficient_in_air_due_to_dried_aerosol_particles)"/>
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        <Value value="P0024-09-00T00:00:00"/>
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    <Attribute name="date_created" type="String">
        <Value value="2018-06-01T00:00:00 UTC"/>
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        <Value value="2017-10-02T07:00:00 UTC"/>
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        <Value value="GAW-WDCA: , IMPROVE: "/>
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        <Value value="Derek Day, William Malm"/>
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    <Attribute name="comment" type="String">
        <Value value="{
    &quot;Data definition&quot;: &quot;EBAS_1.1&quot;, 
    &quot;Set type code&quot;: &quot;TU&quot;, 
    &quot;Timezone&quot;: &quot;UTC&quot;, 
    &quot;File name&quot;: &quot;US1810R.19930102070000.20180601000000.nephelometer..instrument.25y.1h.US11L_Optec-NGN-2_MamothCave.US11L_IMPROVE_nephelometer_2004.lev2.nc&quot;, 
    &quot;File creation&quot;: &quot;20190514095854&quot;, 
    &quot;Startdate&quot;: &quot;19930102070000&quot;, 
    &quot;Revision date&quot;: &quot;20180601000000&quot;, 
    &quot;Version&quot;: &quot;1&quot;, 
    &quot;Version description&quot;: &quot;initial revision, cloud-screened, trace-gas corrected, manually inspected&quot;, 
    &quot;Statistics&quot;: &quot;arithmetic mean&quot;, 
    &quot;Data level&quot;: &quot;2&quot;, 
    &quot;Period code&quot;: &quot;25y&quot;, 
    &quot;Resolution code&quot;: &quot;1h&quot;, 
    &quot;Sample duration&quot;: &quot;1h&quot;, 
    &quot;Orig. time res.&quot;: &quot;1mn&quot;, 
    &quot;Station code&quot;: &quot;US1810R&quot;, 
    &quot;Platform code&quot;: &quot;US1810S&quot;, 
    &quot;Station name&quot;: &quot;Mammoth Cave National Park-Houchin Meadow&quot;, 
    &quot;Station latitude&quot;: &quot;37.1317&quot;, 
    &quot;Station longitude&quot;: &quot;-86.148&quot;, 
    &quot;Station altitude&quot;: &quot;236.0 m&quot;, 
    &quot;Measurement height&quot;: &quot;3.0 m&quot;, 
    &quot;Regime&quot;: &quot;IMG&quot;, 
    &quot;Matrix&quot;: &quot;instrument&quot;, 
    &quot;Laboratory code&quot;: &quot;US11L&quot;, 
    &quot;Instrument type&quot;: &quot;nephelometer&quot;, 
    &quot;Instrument name&quot;: &quot;Optec-NGN-2_MamothCave&quot;, 
    &quot;Instrument manufacturer&quot;: &quot;Optec&quot;, 
    &quot;Instrument model&quot;: &quot;NGN-2&quot;, 
    &quot;Instrument serial number&quot;: &quot;007&quot;, 
    &quot;Method ref&quot;: &quot;US11L_IMPROVE_nephelometer_2004&quot;, 
    &quot;Standard method&quot;: &quot;cal-gas=HFC-134a+AIR_truncation-correction=none+SOP=IMPROVE_nephelometer_2004&quot;, 
    &quot;Inlet type&quot;: &quot;Hat or hood&quot;, 
    &quot;Inlet description&quot;: &quot;open face inlet with rain roof and rain flap, Digitel, flow 140 l/min&quot;, 
    &quot;Humidity/temperature control&quot;: &quot;None&quot;, 
    &quot;Humidity/temperature control description&quot;: &quot;passive, sample heated from atmospheric to instrument temperature&quot;, 
    &quot;Volume std. temperature&quot;: &quot;273.15 K&quot;, 
    &quot;Volume std. pressure&quot;: &quot;1013.25 hPa&quot;, 
    &quot;Measurement uncertainty expl.&quot;: &quot;calculated from replicate samples&quot;, 
    &quot;Zero/negative values code&quot;: &quot;Zero/negative possible&quot;, 
    &quot;Zero/negative values&quot;: &quot;Zero and neg. values may appear due to statistical variations at very low concentrations&quot;, 
    &quot;Organization&quot;: &quot;US12O, \&quot;National Park Service, Headquarters\&quot;, NPS, , \&quot;1849 C Street NW, , 20240, Washington DC, USA\&quot;, , , , &quot;, 
    &quot;Frameworks&quot;: &quot;GAW-WDCA IMPROVE&quot;, 
    &quot;Originator&quot;: &quot;Schichtel, Bret, bret.schichtel@colostate.edu, Cooperative Institute for Research in the Atmosphere, CIRA, , Colorado State University, , 80523-1375, Fort Collins CO, &quot;, 
    &quot;Submitter&quot;: &quot;Malm, William, , , , , , , , , &quot;, 
    &quot;Acknowledgement&quot;: &quot;Request acknowledgement details from data originator&quot;, 
    &quot;Comment&quot;: &quot;NO truncation correction&quot;
}"/>
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