Multiple GPS Base Stations for High-Reliability Positioning

J. Wu and F.G. Yiu

Abstract:	When compared to using a single fixed GPS base station for relative satellite positioning, muhiple base stations would generate a larger amount of L1/L2 carrier phases, leading to more precise and reliable positioning results. The objective of the paper is to verify this. Periodic cosine fimctions are employed to eliminate the integer phase ambiguities. A spatial least squares search algorithm is utilized to produce potential position solutions. With chi-square distributed quadratic forms derived from the estimated measurement residuals, statistical hypothesis testing is conducted to facilitate the identification of a correct position estimate. Long-wavelength wide lane signals are applied to speed up algorithmic convergence. The dual-frequency carrier phase observable were measured with four Leica GPS-System 300 receivers and independent rapid static short-range (< 14.9 km) data sets were analyzed, indicating any precisionkeliability improvements.
Published in:	Proceedings of the 55th Annual Meeting of The Institute of Navigation (1999) June 27 - 30, 1999 Royal Sonesta Hotel Cambridge, MA
Pages:	333 - 338
Cite this article:	Wu, J., Yiu, F.G., "Multiple GPS Base Stations for High-Reliability Positioning," Proceedings of the 55th Annual Meeting of The Institute of Navigation (1999), Cambridge, MA, June 1999, pp. 333-338.
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