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<div class="WordSection1">
<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_2405.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 IGSMAail-8653: Updated antenna model for BDS-3/QZSS and BDS-3 signal switch to B1C/B2a<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" style="font-size:10.0pt;font-family:Consolas">2) GPS III extension for nadir angles beyond 14 degrees adjusted according to Conrad et al. 2023</span><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"><span lang="EN-US">3) The preliminary PCO values for GPS BLOCK IIIA satellite G081 do not correspond with the estimated (see
</span><span lang="EN-GB" style="color:black">on </span><span style="color:black"><a href="https://webigs-rf.ign.fr/zpco"><span lang="EN-GB">https://webigs-rf.ign.fr/zpco</span></a></span><span lang="EN-US">). Therefore the z-PCO has been adjusted by -70mm<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">4) 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-US">t</span><span lang="EN-US">wo new Galileo satellites (E233 and E234) has been added<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">5) 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-US">one new GPS BLOCK IIIA satellite (G082) has been added. Preliminary PCO values have been copied from GPS BLOCK IIIA satellite G081.<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">6) 9 new receiver antenna calibrations which have been performed by Geo++ GmbH:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> CNTAT600BDS CNTS (BDS only)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> KOLK2 NONE<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"></span><span lang="IT-CH"> KOLK60 NONE<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT-CH"> RSIRENO2 NONE<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT-CH"> RSIROVA3 NONE<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT-CH"> STHALPS1 NONE <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT-CH"> STHALPS2 NONE<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="IT-CH"> STHG8 NONE<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> STHINSIGHTV3 NONE<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">7) 2 copied receiver antenna calibrations:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> TPMTPS76 NONE (copied from CHCI76 NONE)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> TPMTPS95 NONE (copied from CHCI93 NONE)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> According to the manufacturer the antennas are identical in construction<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"><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="MsoPlainText"><a href="https://files.igs.org/pub/station/general/igs20_2405.atx.gz"><span lang="EN-US">https://files.igs.org/pub/station/general/igs20_2405.atx.gz</span></a><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US">and<o:p></o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoPlainText"><span lang="EN-US"><a href="https://files.igs.org/pub/station/general/igs20.atx">https://files.igs.org/pub/station/general/igs20.atx</a></span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoPlainText"><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"><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"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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