[IGSSTATION-3649]: R23 almanac problem fixed
Schaer Stefan LT
Stefan.Schaer at swisstopo.ch
Tue Apr 6 06:04:31 PDT 2010
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IGS Station Mail 06 Apr 06:04:47 PDT 2010 Message Number 3649
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Author: Stefan Schaer
Dear IGS colleagues,
The R23 tracking failure reported in IGS Mail 6123
http://igscb.jpl.nasa.gov/mail/igsmail/2010/msg00071.html
was caused by an almanac problem (wrong Tau-n value broadcast by the
GLONASS constellation). The JPS and TPS receiver models we listed in
IGS Mail 6123 do not allow sampling of satellites with inconsistent
almanac information (inconsistent to ephemeris information).
The causative GLONASS almanac problem was finally corrected on 1 April
2010 (day 091) by the GLONASS system operators:
ftp://ftp.unibe.ch/aiub/igsdata/y2010/odata_glonass_d090.txt
ftp://ftp.unibe.ch/aiub/igsdata/y2010/odata_glonass_d091.txt
Meanwhile, R23 is sampled by all GLONASS-capable receivers of the IGS.
Many thanks to Sergei Yudanov (Javad) for his assistance.
Best regards,
Stefan Schaer
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