A New Approach to GPS Carrier-Phase Ambiguity Resolution Using a Reference Receiver Network

J. Raquet

Abstract:	A new approach is presented for performing carrier-phase ambiguity resolution and precise positioning using a net- work of reference receivers. In this approach, a least- squares condition adjustment is performed which “encap- sulates” the information from all of the reference receiv- ers into corrected code and carrier-phase measurements, of a single reference receiver. As a result, there is only one set of carrier-phase ambiguities to be estimated. Standard carrier-phase ambiguity resolution can then be performed between the single corrected reference receiver and a mo- bile receiver, with an improvement in results due to the use of the reference network. This method is tested using a network of four dual- frequency reference receivers separated by 25-120 km. Applying the network-derived measurement corrections to the reference receiver reduces by about 50% the time re- quired to correctly resolve the integer ambiguities. A dis- cussion of the strengths, limitations, and potential apphca- tions of this method is also presented.
Published in:	Proceedings of the 1997 National Technical Meeting of The Institute of Navigation January 14 - 16, 1997 Loews Santa Monica Hotel Santa Monica, CA
Pages:	357 - 366
Cite this article:	Raquet, J., "A New Approach to GPS Carrier-Phase Ambiguity Resolution Using a Reference Receiver Network," Proceedings of the 1997 National Technical Meeting of The Institute of Navigation, Santa Monica, CA, January 1997, pp. 357-366.
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