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<p class="MsoNormal"><span lang="EN-US">Dear colleagues<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The absolute IGS antenna correction file (igs20_wwww.atx) has been updated.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The new release is called 'igs20_2287.atx'. It contains the following changes:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<ol style="margin-top:0cm" start="1" type="1">
<li class="MsoListParagraph" style="margin-left:-15.75pt;mso-list:l0 level1 lfo1">
<span lang="EN-US">According to https://files.igs.org/pub/station/general/igs_satellite_metadata.snx the GLONASS-K2 satellite R803 (R26) started to transmit on the 8. September 2023. Therefore, following entry was added:<o:p></o:p></span></li></ol>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">R26 (R803): 8. September 2023<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US">ESOC, DLR, and CODE have estimated preliminary PCO values for the new GLONASS-K2 satellite. The PCO values reflect a mean value of the three estimations (rounded). Once the final PCO values
are known, the PCO values will be updated:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:18.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">X: 110cm<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Y: 0cm<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Z: 90cm<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<ol style="margin-top:0cm" start="2" type="1">
<li class="MsoListParagraph" style="margin-left:-15.75pt;mso-list:l0 level1 lfo1">
<span lang="EN-US">According to https://files.igs.org/pub/station/general/igs_satellite_metadata.snx the GLONASS-K1 satellite R801 (R26) has stopped transmitting on the 26. October 2020. Therefore, following decommission date was added:<o:p></o:p></span></li></ol>
<p class="MsoNormal" style="margin-left:2.25pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">R26 (R801): 26. October 2020<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">3) One additional antenna type calibration has been added that was performed by Geo++ GmbH:
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> - One robot calibration provided by Leica Geosystems AG has been added:
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> LEIICG160 NONE<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The updated antenna correction model is available at<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><a href="https://files.igs.org/pub/station/general/igs20_2287.atx.gz"><span lang="EN-US">https://files.igs.org/pub/station/general/igs20_2287.atx.gz</span></a><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">and<o:p></o:p></span></p>
<p class="MsoNormal"><a href="https://files.igs.org/pub/station/general/igs20.atx"><span lang="EN-US">https://files.igs.org/pub/station/general/igs20.atx</span></a><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal">Best regards,<o:p></o:p></p>
<p class="MsoNormal">Arturo<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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