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                <gco:CharacterString>S5P_TROPOMI_L4_P1D_NO2surf</gco:CharacterString>
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              <gmd:description>
                <gco:CharacterString>EOC STAC Collection</gco:CharacterString>
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                <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download" />
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          </gmd:onLine>
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            <gmd:CI_OnlineResource>
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                <gmd:URL>https://geoservice.dlr.de/eoc/atmosphere/wms?SERVICE=WMS&amp;REQUEST=GetCapabilities</gmd:URL>
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              <gmd:protocol>
                <gco:CharacterString>OGC:WMS-http-get-capabilities</gco:CharacterString>
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                <gmd:CI_OnLineFunctionCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information" />
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          <gmd:onLine>
            <gmd:CI_OnlineResource>
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                <gmd:URL>https://geoservice.dlr.de/eoc/atmosphere/wcs?SERVICE=WCS&amp;REQUEST=GetCapabilities</gmd:URL>
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                <gco:CharacterString>OGC:WCS-http-get-capabilities</gco:CharacterString>
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        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
    </gmd:MD_Distribution>
  </gmd:distributionInfo>
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        <gmd:DQ_Scope>
          <gmd:level>
            <gmd:MD_ScopeCode codeListValue="series" codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_ScopeCode" />
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                    <gco:CharacterString>VERORDNUNG (EG) Nr. 1089/2010 DER KOMMISSION vom 23. November 2010 zur Durchführung der Richtlinie 2007/2/EG des Europäischen Parlaments und des Rates hinsichtlich der Interoperabilität von Geodatensätzen und -diensten</gco:CharacterString>
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                        <gco:Date>2010-12-08</gco:Date>
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                        <gmd:CI_DateTypeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication" />
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      <gmd:lineage>
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          <gmd:statement>
            <gco:CharacterString>The input data for the L4 product is the Sentinel-5P TROPOMI NRT Level 2 product "S5P_NRTI_L2__NO2__"</gco:CharacterString>
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                <gco:CharacterString>Processing: 
                Data assimilation (Optimal Interpolation) of S5P TropOMI tropospheric NO2 columns into chemical dispersion model Polyphemus/DLR for Germany and neighbor countries. S5P L2 data is filtered for outliers, original accuracy error and quality flags are used. OI applies parametrized Gaussian covariances. Observation operator is preprocessed based on available observations. Processing is parallelized for scaling with CPUs and threads.
                Quality Assurance: 
                First-guess errors, analysis errors and S5p data coverage are monitored on a daily base https://wdc.dlr.de/data_lib/S5P/TROPOMI/L4/LATEST/S5P_NRT_OI.errs.svg</gco:CharacterString>
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