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<p class="MsoNormal"><span lang="EN-US">Dear colleagues</span><span lang="EN-US" style="mso-fareast-language:DE-CH"><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_2303.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:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">Two BEIDOU-3M-CAST satellites C232 and C233 have been launched in 2023. As preliminary PCO values the values from BEIDOU-3M-CAST satellite C228 has been assigned
to the two new satellites.<o:p></o:p></span></li></ol>
<p class="MsoListParagraph"><span lang="EN-US">C232 (C50): 2023 12 26<o:p></o:p></span></p>
<p class="MsoListParagraph"><span lang="EN-US">C233 (C48): 2023 12 26<o:p></o:p></span></p>
<p class="MsoListParagraph"><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:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US">According to DLR (</span><a href="https://igs.org/mgex/metadata/#metadata"><span lang="EN-US">MGEX Metadata – International GNSS Service (igs.org)</span></a><span lang="EN-US">)
in December 2023 the two GLONASS-K2 satellite R803 and GLONASS-K1 satellite R807 have swoped their PRN assignments for approx. one week and afterwards swapped back to the original assignment. Therefore, in accordance with the satellite metadata SINEX file
(<span class="MsoHyperlink"><a href="https://files.igs.org/pub/station/general/igs_satellite_metadata.snx?_gl=1*1i7sjjp*_ga*OTYxNzYyMjA2LjE2NzU4NDY2MTU.*_ga_Z5RH7R682C*MTcwODk2MjEwOC42Mi4xLjE3MDg5NjIxMTcuNTEuMC4w">IGS satellite metadata file</a></span>) following
entries have been 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">R803 was changed during the time period 2023 12 7 7 30 0.0 until 2023 12 14 10 29 59.0 from R26 to R25<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">R807 was changed during the time period 2023 12 7 2 30 0.0 until 2023 12 14 10 29 59.0 from R25 to R26<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<pre style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l0 level1 lfo1"><![if !supportLists]><span lang="EN-US" style="font-family:"Arial",sans-serif;color:black"><span style="mso-list:Ignore">3)<span style="font:7.0pt "Times New Roman""> </span></span></span><![endif]><span lang="EN-US" style="font-family:"Arial",sans-serif;color:black">One additional antenna type calibration has been added that was performed by Geo++ GmbH<o:p></o:p></span></pre>
<pre><span lang="EN-US" style="font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></pre>
<pre><span lang="EN-US" style="font-family:"Arial",sans-serif;color:black"> - One robot calibration provided by Guangzhou GEOSURV Technology Co., Ltd has been added:<o:p></o:p></span></pre>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:DE-CH"> G</span>ING40 NONE<span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black;mso-fareast-language:DE-CH"><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">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="MsoPlainText"><a href="https://files.igs.org/pub/station/general/igs20_2303.atx.gz"><span lang="EN-US">https://files.igs.org/pub/station/general/igs20_2303.atx.gz</span></a><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"><a href="https://files.igs.org/pub/station/general/igs20.atx">https://files.igs.org/pub/station/general/igs20.atx</a><o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Best regards,<o:p></o:p></p>
<p class="MsoPlainText">Arturo<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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