GLONASS Tracking Issue with GPS1200 GG and GPS900 GG now solved - 30.04.10

Unfortunately, due to an unannounced GLONASS almanac update at midnight on 28.04.10, specific models of GPS1200 combined GPS/GLONASS receivers had a GLONASS tracking problem.

During Thursday 29th April the GLONASS ground control centre corrected an almanac issue on the decommissioned GLONASS satellite SLOT 6. This means that since yesterday afternoon, Thursday 29th April, GLONASS tracking works fine without any problems on Leica rover sensors, GX1220 GG, GX1230 GG, ATX1230 GG and ATX900 GG. Other Leica sensors such as Leica Viva and GPS1200+ were not affected at all.

In order to overcome the tracking issues, the upload of a new free of charge ME firmware (3.019) is strongly recommended. The new ME firmware version can be downloaded from the MyWorld @ Leica Geosystems https://myworld.leica-geosystems.com or the Leica Geosystems download section http://www.leica-geosystems.com/en/page_dynamic.htm?id=13413

It is expected that GLONASS almanac will change again soon, so in order to eliminate this uncertainty the new firmware version should be loaded, as it solves the aforementioned tracking issues.

Limited information on maintenance of the spare M-type satellite Slot 6 is given on the GLONASS website
http://www.glonass-ianc.rsa.ru/pls/htmldb/f?p=202:1:1785743766860469::NO

Please note that the OSNet GNSS reference station receivers did not suffer any issues in GB. However the OSi network in Ireland did require a reset of all almanacs during yesterday morning to restore the network in full and the updated firmware has been addressed.

Leica Geosystems would like to apologise for any inconveniences that this problem may have caused.

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