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         <gmd:EX_GeographicBoundingBox>
          <gmd:westBoundLongitude>
           <gco:Decimal>-180</gco:Decimal>
          </gmd:westBoundLongitude>
          <gmd:eastBoundLongitude>
           <gco:Decimal>180</gco:Decimal>
          </gmd:eastBoundLongitude>
          <gmd:southBoundLatitude>
           <gco:Decimal>-90</gco:Decimal>
          </gmd:southBoundLatitude>
          <gmd:northBoundLatitude>
           <gco:Decimal>90</gco:Decimal>
          </gmd:northBoundLatitude>
         </gmd:EX_GeographicBoundingBox>
        </gmd:geographicElement>
        <gmd:temporalElement>
         <gmd:EX_TemporalExtent>
          <gmd:extent>
           <gml:TimePeriod xsi:type="gml:TimePeriodType" gml:id="T68d29f9157a8c">
            <gml:beginPosition>1994-01-01</gml:beginPosition>
            <gml:endPosition>2020-12-31</gml:endPosition>
           </gml:TimePeriod>
          </gmd:extent>
         </gmd:EX_TemporalExtent>
        </gmd:temporalElement>
       </gmd:EX_Extent>
      </gmd:extent>
     </gmd:MD_DataIdentification>
    </gmd:identificationInfo>
    <gmd:distributionInfo>
     <gmd:MD_Distribution>
      <gmd:transferOptions>
       <gmd:MD_DigitalTransferOptions>
        <gmd:onLine>
         <gmd:CI_OnlineResource>
          <gmd:linkage>
           <gmd:URL>http://doi.org/10.5880/GFZ.1.1.2021.001</gmd:URL>
          </gmd:linkage>
          <gmd:protocol>
           <gco:CharacterString>WWW:LINK-1.0-http--link</gco:CharacterString>
          </gmd:protocol>
          <gmd:name>
           <gco:CharacterString>Data Access - DOI</gco:CharacterString>
          </gmd:name>
          <gmd:description>
           <gco:CharacterString>Data Access - DOI</gco:CharacterString>
          </gmd:description>
          <gmd:function>
           <gmd:CI_OnLineFunctionCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode_information">information</gmd:CI_OnLineFunctionCode>
          </gmd:function>
         </gmd:CI_OnlineResource>
        </gmd:onLine>
       </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
     </gmd:MD_Distribution>
    </gmd:distributionInfo>
    <gmd:dataQualityInfo>
     <gmd:DQ_DataQuality>
      <gmd:scope>
       <gmd:DQ_Scope>
        <gmd:level>
         <gmd:MD_ScopeCode codeListValue="dataset" codeList="http://www.isotc211.org/2005/resources/codeList.xml#MD_ScopeCode"/>
        </gmd:level>
       </gmd:DQ_Scope>
      </gmd:scope>
      <gmd:lineage>
       <gmd:LI_Lineage>
        <gmd:statement>
         <gco:CharacterString>Based on a network of around 300 GNSS stations of the tracking network of the International GNSS Service, the GFZ analysis center generated a fully consistent solution series using the latest development version of the EPOS.P8 Software. The processing is described in detail in our repro3 version of the Analysis Center Notes (ftp://isdcftp.gfz-potsdam.de/gnss/products/repro3/gfz_repro3.acn) and follows the current geodetic conventions (https://www.iers.org/IERS/EN/Publications/TechnicalNotes/tn36.htm) as well as the repro3 standards (http://acc.igs.org/repro3/repro3.html). Results of a test campaign are reported in Männel et al. (2020).

The solution series contains daily and weekly files (&lt;YYYY&gt;&lt;DDD&gt; refers to the year and day of year of the first epoch contained in the files):
 
 - satellite orbits (GFZ2R03FIN_&lt;YYYY&gt;&lt;DDD&gt;0000_01D_05M_ORB.SP3.gz, data format: sp3: https://files.igs.org/pub/data/format/sp3c.txt), 
 - clock corrections (GFZ2R03FIN_&lt;YYYY&gt;&lt;DDD&gt;0000_01D_30S_CLK.CLK.gz, data format: clk: https://files.igs.org/pub/data/format/rinex_clock302.txt), 
- bias corrections (GFZ2R03FIN_&lt;YYYY&gt;&lt;DDD&gt;0000_01D_01D_OSB.BIA.gz, data format: bia: https://files.igs.org/pub/data/format/sinex_bias_100.pdf),
- troposphere delays and gradients (GFZ2R03FIN_&lt;YYYY&gt;&lt;DDD&gt;0000_01D_02H_TRO.TRO.gz, data format: tro: https://files.igs.org/pub/data/format/sinex_tro_v2.00.pdf),
- spacecraft attitude (GFZ2R03FIN_&lt;YYYY&gt;&lt;DDD&gt;0000_01D_01D_ORB.OBX.gz, data format: orb: http://acc.igs.org/misc/ORBEX009.pdf),
 - station coordinates (GFZ2R03FIN_&lt;YYYY&gt;&lt;DDD&gt;0000_01D_01D_SOL.SNX.gz,data format: snx: https://www.iers.org/IERS/EN/Organization/AnalysisCoordinator/SinexFormat/sinex.html), 
 - Earth rotation parameters (GFZ2R03FIN_&lt;YYYY&gt;&lt;DDD&gt;0000_07D_07D_ERP.ERP.g, data format: erp https://lists.igs.org/pipermail/igsmail/1998/003315.html) are provided weekly, 
 - processing summary (GFZ2R03FIN _&lt;YYYY&gt;&lt;DDD&gt;0000_07D_07D_DSC.SUM.gz) containing the detailed processing results is provided on a weekly basis 

The file naming follows the IGS Long Product Filename (http://acc.igs.org/repro3/Long_Product_Filenames_v1.0.pdf). All files are .gz compressed. 
</gco:CharacterString>
        </gmd:statement>
       </gmd:LI_Lineage>
      </gmd:lineage>
     </gmd:DQ_DataQuality>
    </gmd:dataQualityInfo>
   </gmd:MD_Metadata>