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</o:shapelayout></xml><![endif]--></head><body lang=DE link="#467886" vlink="#96607D" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Dear station operators, <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 QZS-1R satellite (SVN J005, PRN J04) switched transmission of L1C/A to L1C/B on August 10, 2025: <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>https://qzss.go.jp/en/overview/notices/qzs1r_250704.html<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>https://qzss.go.jp/en/overview/notices/qzs1r_250810.html<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>Unfortunately, only very few receivers of the IGS network currently include QZS-1R L1C/B observations in their RINEX files. In particular, Septentrio PolaRx5 receivers fully support the tracking and RINEX file generation of the L1C/B signal with the latest firmware 5.6.0. Therefore, we would like to ask all operators of PolaRx5 receivers within the QZS-1R visibility area to:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Update the firmware to 5.6.0<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Enable the tracking of L1C/B<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l0 level1 lfo1'><span lang=EN-US>Include L1C/B observations in the RINEX file generation<o:p></o:p></span></li></ul><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The latest QZSS satellite QZS-6 as well as all future QZSS satellites also transmit L1C/B instead of L1C/A.<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>Thanks for your support and best regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal>Peter Steigenberger, Kyohei Akiyama<o:p></o:p></p><p class=MsoNormal>Chairs IGS Multi-GNSS Pilot Project<o:p></o:p></p><p class=MsoNormal><span style='font-family:"Calibri",sans-serif;mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>----------------------------------------------------<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>Peter Steigenberger<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR) <o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>German Space Operations Center Oberpfaffenhofen<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>D-82234 Wessling<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>Germany<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>Tel. +49 (8153) 28-3765<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>Fax +49 (8153) 28-1450<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>e-mail <a href="mailto:peter.steigenberger@dlr.de"><span style='color:#0563C1'>peter.steigenberger@dlr.de</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New";mso-ligatures:none'>----------------------------------------------------<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>