Latency Update Sample Interval (N)
Satellite ephemedides / Satellite & station clocks
Broadcast Orbits Real time daily
Sat clocks
Ultra-rapid (predicted half) Orbits Real time 15 min
Sat clocks
Ultra-rapid (observed half) Orbits 3-9 hours 15 min
Sat clocks
Rapid Orbits 17-41 hours 15 min
Sat & stn clocks 5 min
Final Orbits 12-18 days 15 min
Sat & stn clocks sat : 30s
stn : 5 min
GLONASS Satellite Ephemerides
Final 12-18 days 15 min
Geocentric coordinates of IGS tracking stations (>250 sites)
Final positions horizontal 11-17 days weekly
vertical
Final velocities horizontal 11-17 days weekly
vertical
Earth Rotation Parameters :
Polar Motion (PM), Polar Motion Rates (PM rates), Length-of-day (LOD)
Ultra-rapid (predicted half) PM Real time Daily integrations at 00,06,12,18 UTC
PM rates
LOD
Ultra-rapid (observed half) PM 3-9 hours Daily integrations at 00,06,12,18 UTC
PM rates
LOD
Rapid PM 17-41 hours Daily integrations at 12 UTC
PM rates
LOD
Final PM 11-17 days Daily integrations at 12 UTC
PM rates
LOD
Atmospheric parameters
Rapid ionospheric TEC grid <24 hours 2 hours
5deg (long) x 2.5deg (lat)
Final ionospheric TEC grid ~11 days 2 hours
5deg (long) x 2.5deg (lat)
Final tropospheric path delay <4 weeks 2 hours