Real-time Clock Estimation for Precise Orbit Determination of LEO-Satellites

A. Hauschild, O. Montenbruck

Abstract:	In this paper, a real-time system for clock offset estimation of GPS satellites is presented. The algorithm is based on a Kalman-filter and processes undifferenced code and carrier-phase measurements of a global NTRIP tracking network. The clock offset and drift of the satellite clocks are estimated along with tracking station clock offsets, tropospheric zenith path delay and carrier-phase ambiguities. The filter algorithm and data processing scheme is presented. The accuracy of the orbit and clock product is assessed with a precise orbit determination of the TerraSar-X satellite and compared to results gained with the IGU predicted products.
Published in:	Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008) September 16 - 19, 2008 Savannah International Convention Center Savannah, GA
Pages:	581 - 589
Cite this article:	Hauschild, A., Montenbruck, O., "Real-time Clock Estimation for Precise Orbit Determination of LEO-Satellites," Proceedings of the 21st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2008), Savannah, GA, September 2008, pp. 581-589.
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