Rapid Ambiguity Resolution using Multipath Spatial Processing for High Accuracy Carrier Phase

Alison Brown and Kees Stolk

Abstract:	The largest error component on the carrier-phase observations is generally caused by carrier-phase multipath offsets. This generally results in a slow oscillating cyclic offset which must be averaged (either through satellite or vehicle motion) before reliable ambiguity resolution can be performed for kinematic positioning. NAVSYS has developed a digital spatial processing receiver that uses the spatial degrees of freedom within an antenna array to minimize multipath errors on the carrier-phase observations. This in turn makes the ambiguity solution more reliable and reduces the number of processing cycles needed to result in a kinematic position fix. In this paper, test results are presented showing the reduction in the carrier phase errors when using this approach. Kinematic positioning test results are also shown using the HAGR digital beam- steering GPS receiver.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	973 - 980
Cite this article:	Brown, Alison, Stolk, Kees, "Rapid Ambiguity Resolution using Multipath Spatial Processing for High Accuracy Carrier Phase," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 973-980.
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