Real Time Ambiguity Resolution While on the Move

David Walsh

Abstract:	For cm-accuracy real time kinematic GPS positioning prompt resolution of the phase ambiguities is required. The ambiguities must be resolved as fast as possible in order to move from metre level pseudorange precision to cm level phase precision. To decrease the time 01 resolution full advantage must be taken of the changing satcllite geometry. A new method of ambiguity resolution is dcscribcd in this paper. This involves a search technique based around a direct least squares derivation of the ambiguities which is not affected by receiver motion. The technique searches for the ambiguities which have the minimum residuals and also minimise a time dependant funclion of the residuals. Results using single and dual frequency data show that it is possible to resolve the ambiguities within seconds while on the move.
Published in:	Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992) September 16 - 18, 1992 Albuquerque, NM
Pages:	473 - 481
Cite this article:	Walsh, David, "Real Time Ambiguity Resolution While on the Move," Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992), Albuquerque, NM, September 1992, pp. 473-481.
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