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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_2370.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>
<p class="MsoNormal"><span lang="EN-US">1) According to the </span><a href="https://files.igs.org/pub/station/general/igs_satellite_metadata.snx?_gl=1*a69uf*_ga*NTU2NDgyMzczLjE3MzI0NzU1MTA.*_ga_Z5RH7R682C*MTc0MTA5ODU4MC4xNS4xLjE3NDEwOTk0OTMuNjAuMC4w"><span lang="EN-GB" style="color:#008299;background:white;text-decoration:none">IGS
satellite metadata file</span></a> <span lang="EN-GB">following new satellite launch (GPS BLOCK IIIA G081) and constellation changes have been added:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> Decommissioned:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> G045 (G21): 2025 04 04 23 59 59 (BLOCK IIR-A)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> R720 (R19): 2025 05 16 21 44 59 (GLONASS-M)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> R807(R25): 2025 05 16 21 44 59 (GLONASS-K1)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> Added:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> R720 (R25): 2025 05 16 21 45 00 (GLONASS-M)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> R807 (R19): 2025 05 16 21 45 00 (GLONASS-K1)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> G081 (G21): 2025 05 30 00 00 00 (New GPS BLOCK IIIA satellite G081 with preliminary PCO values)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><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">2) Five new antenna calibrations which have been 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 antenna calibration was copied from
</span><span lang="EN-GB">GMXZENITH06 NONE. According to the manufacturer the antennas are identical in construction:</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> </span><span lang="EN-US"> </span><span lang="EN-GB"> GMXZENITH06PRO 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">- Two antenna calibrations provided by South Geo-information:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> KOLK6 NONE <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"> </span><span lang="EN-US">RSIROVA1S 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">- Two antenna calibrations provided by TI Asahi Co. Ltd.:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> TIAPENG7H+ NONE <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> TIAPENGX2A NONE<o:p></o:p></span></p>
<p class="m6936121351531566283msoplaintext"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="m6936121351531566283msoplaintext"><span lang="EN-US" style="mso-fareast-language:EN-US">The updated antenna correction model is available at<o:p></o:p></span></p>
<p class="m6936121351531566283msoplaintext"><a href="https://files.igs.org/pub/station/general/igs20_2370.atx.gz"><span lang="EN-US">https://files.igs.org/pub/station/general/igs20_2370.atx.gz</span></a><o:p></o:p></p>
<p class="m6936121351531566283msoplaintext"><span lang="EN-US">and</span><span lang="EN-GB"><o:p></o:p></span></p>
<pre><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:black"><a href="https://files.igs.org/pub/station/general/igs20.atx.gz%20%0d" target="_blank"><span lang="EN-GB">https://files.igs.org/pub/station/general/igs20.atx.gz </span></a></span><span lang="EN-GB"><o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Arturo<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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