Temporal Characteristics of Multipath Errors

Ahmed El-Rabbany

Abstract:	Precise (centimeter level) real-time kinematic GPS positioning requires resolving the integer ambiguity parameters on-the-fly. A limiting factor for successful ambiguity resolution is the existing of the unmodelled multipath errors in both the carrier phase and the pseudorange measurements. Multipath errors can be modelled stochastically if the temporal characteristics of these errors are understood. This can be done by analyzing dual frequency data as well as’ data from short baselines of several meters apart observed under different multipath conditions. Once the temporal characteristics of the multipath errors are obtained and understood, they can be used to create a covariance model (e.g. first order Gauss-Marcov), which accounts for the multipath errors. In this paper, the multipath errors are analyzed so that their temporal characteristics can be obtained. The way of developing the covariance model is also given.
Published in:	Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA
Pages:	1493 - 1497
Cite this article:	El-Rabbany, Ahmed, "Temporal Characteristics of Multipath Errors," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 1493-1497.
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