Calibration of Differential Phase Map Compensation Using Single Axis Rotation

Eric Sutton

Abstract:	This paper describes a new technique for measuring the differential phase map between two GPS antennas. The primary application for a differential phase map is to increase the accuracy of GPS attitude determination systems. The technique proposed in this paper uses a rotating test fixture to increase phase map coverage, assist in accurately determining true antenna positions, and reduce the effect of environmentally generated multipath errors, Use of the rotating test fixture also simplifies integer ambiguity resolution. The proposed technique is less expensive than anechoic chamber testing, and less time consuming than static testing. Although at this time data collection has been limited, several examples of phase maps generated using the new technique will be presented, and in one case a phase map using the new technique will be compared to a phase map generated by an echoic chamber testing.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	1831 - 1840
Cite this article:	Sutton, Eric, "Calibration of Differential Phase Map Compensation Using Single Axis Rotation," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 1831-1840.
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