Carrier Phase Ambiguity Resolution Using GPS and GLONASS signals

Herbert Landau and Ulrich Vollath

Abstract:	The performance of carrier phase ambiguity resolution is dependent on the number of frequencies available (single or dual-frequency), the tracking time span and the number of satellites. In obstructed locations like urban canyons satellite systems are limited by nature. A combined GPS and GLONASS system will therefore reach a far higher availability than the GPS system alone. This paper presents a method for the combination of GPS and GLONASS data. In particular results of analyses for the carrier phase ambiguity resolution are given. Special problems like interchannel biases, reference time differences are discussed in detail. Results on convergence times and accuracy with respect to the number of satellites, environmental situations etc. are shown. It is demonstrated, that the combination of GPS and GLONASS also achieves high accuracy in differential positioning without fixing the ambiguities at all. Accuracies in the 1 dm range seem possible after reasonable convergence times of approx. 10 minutes.
Published in:	Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996) September 17 - 20, 1996 Kansas City, MO
Pages:	917 - 823
Cite this article:	Landau, Herbert, Vollath, Ulrich, "Carrier Phase Ambiguity Resolution Using GPS and GLONASS signals," Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996), Kansas City, MO, September 1996, pp. 917-823.
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