Assessment of NRCan Rapid and Predicted GPS Satellite Orbits

C. Huot, P. Tetreault, Y. Mireault, J. Kouba and J. Popelar

Abstract:	International GPS Service for Geodynamics (IGS) Analysis Centers providing independent computation of GPS satellite orbits, clocks and Earth Orientation Parameters (EOP). Precise satellite orbits and clocks have been generated at NRCan using the Jet Propulsion Laboratory (JPL) GIPSY-OASIS II software since August 1992. Currently, NRCan generates satellite ephemerides and clocks at 15 minute intervals on a daily basis. NRCan final orbits and clocks are usually produced 3 days after the end of each UT day. Since January 1996, NRCan has been generating rapid orbits and clocks with a delay of less than 24 hours after the last observation. Also, predicted orbits have been generated since March 1997 and are available a few hours prior to the day to which they apply. The NRCan rapid and predicted orbits are compared to the final IGS orbits which are produced as a combination of the final orbital solutions provided by the 7 IGS Analysis Centers [Kouba et al., 19951. Current NRCan final orbits show a precision of about 1Ocm RMS when compared to the IGS final orbits. Results indicate that this precision decreases to approximately 15cm RMS for the rapid orbits and to 92cm RMS for the predicted orbits.
Published in:	Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997) June 30 - 2, 1997 Albuquerque, NM
Pages:	261 - 266
Cite this article:	Huot, C., Tetreault, P., Mireault, Y., Kouba, J., Popelar, J., "Assessment of NRCan Rapid and Predicted GPS Satellite Orbits," Proceedings of the 53rd Annual Meeting of The Institute of Navigation (1997), Albuquerque, NM, June 1997, pp. 261-266.
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