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<p class="MsoNormal">Dear colleagues<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoPlainText">The absolute IGS antenna correction file (igs20_wwww.atx) has been updated.<o:p></o:p></p>
<p class="MsoPlainText">The new release is called 'igs20_2247.atx'. It contains the following
<o:p></o:p></p>
<p class="MsoPlainText">changes:<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo3">
<![if !supportLists]><span style="mso-list:Ignore">1)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>According to GPS NANU 2023007 a new GPS BLOCK III A satellite was launched on 18. January 2023.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<pre>2. GPS SATELLITE SVN79 (PRN28) WAS LAUNCHED ON JDAY 018. <o:p></o:p></pre>
<pre> A USABINIT NANU WILL BE SENT WHEN THE SATELLITE IS SET ACTIVE TO SERVICE.<o:p></o:p></pre>
<p class="MsoPlainText" style="margin-left:36.0pt"><a href="https://www.navcen.uscg.gov/sites/default/files/gps/nanu/2023/2023007.nnu">https://www.navcen.uscg.gov/sites/default/files/gps/nanu/2023/2023007.nnu</a><o:p></o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt">The GPS satellite started to transmit on the 31. January 2023. Therefore, following starting date has been added:<o:p></o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt">G28 (G079): 31. January 2023<o:p></o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt"><o:p> </o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt">As preliminary PCOs the values from GPS BLOCK IIIA G078 has been used.<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText" style="margin-left:36.0pt;text-indent:-18.0pt;mso-list:l1 level1 lfo3;background:white">
<![if !supportLists]><span style="mso-list:Ignore">2)<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>According to CODE the GPS satellite G049 has stopped transmitting since 2. November 2022. Therefore, following decommission date has been added:<o:p></o:p></p>
<p class="MsoListParagraph" style="background:white"><o:p> </o:p></p>
<p class="MsoListParagraph" style="background:white">G28 (G049): 02. November 2022<o:p></o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt;background:white"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-left:36.0pt;background:white"><o:p> </o:p></p>
<p class="MsoPlainText">The updated antenna correction model is available at<o:p></o:p></p>
<p class="MsoPlainText"><a href="https://files.igs.org/pub/station/general/igs20_2247.atx">https://files.igs.org/pub/station/general/igs20_2247.atx</a><o:p></o:p></p>
<p class="MsoPlainText">and<o:p></o:p></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">With best regards,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">Arturo Villiger<o:p></o:p></p>
<p class="MsoNormal"><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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