Specific GNSS tracking problems indicated by Z18 IGS/IGLOS receivers -------------------------------------------------------------------- The following GPS tracking problems may be noticed in http://www.aiub.unibe.ch/download/igsdata/old/odata_mixed_receiver.txt - davr wrt G02, G03, - godz ok (often incomplete 24-hour sessions, see godz.txt), - hert wrt G08, - kr0g wrt G02, - ohi3 wrt G03, G08, - reyz wrt G02, G03 (GLONASS tracking data unavailable, see corresponding _gps chart), - thu2 wrt G02, G03, G08. The following GLONASS tracking problems may be noticed in http://www.aiub.unibe.ch/download/igsdata/old/odata_mixed_day.txt - R03, R07 were not really tracked by Z18 receivers from D115/D118 through D123, - R24 was not tracked from D125 through D130; - no GLONASS satellites observed at lhaz, reyz, wtzz. Note: R07 was permanently marked unhealthy from D115 through D117. Tracking of unhealthy satellites, like G22, basically seems to work at some Z18 receivers (with more or less success): hert, mat1, mtka. GNSS tracking problems as indicated by Javad IGS/IGLOS receivers are described at: http://igscb.jpl.nasa.gov/mail/igsmail/2003/msg00149.html http://igscb.jpl.nasa.gov/mail/iglosmail/2003/msg00036.html General remark: From the IGS point of view, each receiver of the ground network should, as far as possible, sample all transmitting satellites from horizon to horizon (barring obstructions). The Javad receiver at dwh1 is a good example.