GPS Carrier phase Ambiguity Resolution Using Satellite-Satellite Single Differences

Michael J. Gabor, R. Steven Nerem

Abstract:	GPS carrier phase ambiguities consist of an integer number of cycles distance between a transmitter and a receiver and a fractional bias due to hardware effects at the transmitter and the receiver. In this paper, in-stead of using double differences to remove the frac-tional phase contributions, single differences remove only the receiver effects. The satellite effects are esti-mated from a globally distributed network of receivers used for GPS precise orbit computations. Once satel-lite pair biases are calibrated, this paper’s method al-lows single site ambiguity resolution that takes advan-tage of the bootstrapping of the network. Time series of the widelane carrier phase calibrations show definite trends. Because of the higher relative noise, it is more difficult to see trends in the L1 bias calibration. The ultimate goal of this technique is to have an ambiguity resolution technique that can be applied during point positioning surveying.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	1569 - 1578
Cite this article:	Gabor, Michael J., Nerem, R. Steven, "GPS Carrier phase Ambiguity Resolution Using Satellite-Satellite Single Differences," Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999), Nashville, TN, September 1999, pp. 1569-1578.
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