Centimeter-Level Relative Positioning of Distributed Moving Platforms Using GPS Carrier Phase Observables

Ning Luo and Gérard Lachapelle

Abstract:	The precise relative positioning of moving platforms is required for numerous applications. Relative GPS carrier phase can provide cm-level positioning accuracy using a fixed integer ambiguity approach, provided that a short time to ambiguity resolution and a high level of reliability are not major concerns. When the precise relative positioning of several moving platforms is required, the redundancy provided by the multiplicity of platforms can speed up the time to ambiguity resolution while at the same time improve the reliability. This paper presents an approach to position multiple moving platforms to cm-level with respect to each other using ambiguity constraints available through the multiplicity of platforms. Various simulations are designed and conducted to investigate the effects of different system parameters on this approach using a configuration of three moving platforms. Results from these simulations show that the use of ambiguity constraints improve the time to integer ambiguity resolution by up to over 50%, depending on the magnitude of the various system errors.
Published in:	Proceedings of the 55th Annual Meeting of The Institute of Navigation (1999) June 27 - 30, 1999 Royal Sonesta Hotel Cambridge, MA
Pages:	307 - 313
Cite this article:	Luo, Ning, Lachapelle, Gérard, "Centimeter-Level Relative Positioning of Distributed Moving Platforms Using GPS Carrier Phase Observables," Proceedings of the 55th Annual Meeting of The Institute of Navigation (1999), Cambridge, MA, June 1999, pp. 307-313.
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