Combined Processing of GPS, GLONASS, and SBAS Code Phase and Carrier Phase Measurements

Lambert Wanninger and Stephan Wallstab-Freitag

Abstract:	Precise (centimetre level) applications require code and carrier phase pseudoranges and differential positioning including carrier phase ambiguity resolution. Objective of this research work is to combine GPS with GLONASS and single-frequency SBAS ranging to gain improved availability, faster ambiguity resolution, and higher accuracy. Although GLONASS and SBAS broadcast orbits and often code observations are of lower accuracy than those of GPS, carrier phase observations are of similar quality. In contrast to GPS, GLONASS requires the estimation of inter-channel biases and SBAS multipath effects of static observations produce biases in the coordinates. Nevertheless, RTK (Real Time Kinematic) and fast static positioning improves considerably if all existing ranging signals are used.
Published in:	Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007) September 25 - 28, 2007 Fort Worth Convention Center Fort Worth, TX
Pages:	866 - 875
Cite this article:	Wanninger, Lambert, Wallstab-Freitag, Stephan, "Combined Processing of GPS, GLONASS, and SBAS Code Phase and Carrier Phase Measurements," Proceedings of the 20th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2007), Fort Worth, TX, September 2007, pp. 866-875.
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