A Preliminary Simulation Result of Integrating A LEO Satellite for Carrier Phase Differential Positioning Systems

Shane-Woei Lee, Frank van Graas

Abstract:	A software algorithm that uses a Modified Extended Kalman Filter (MEKF) to process accumulated carrier phase measurements by different signal sources will be presented. The object of this paper is to present the concept and demonstrate the feasibility of integrating a LEO satellite with GPS to estimate a user’s 3-D position dynamically. A simulation was conducted to provide preliminary results that show a user’s 3-D position obtained by such an estimation algorithm can converge to centimeter level accuracy in a 1 minute time interval, provided that a LEO satellite is integrated into the process. Also, a model refinement is presented to linearize the measurement model for the LEO satellite. The above stated performance and accuracy do not require ambiguity resolution. However, the floating ambiguity can be estimated as well using the algorithm, and the accuracy of the estimated floating ambiguity is at the sub-meter level.
Published in:	Proceedings of the 1998 National Technical Meeting of The Institute of Navigation January 21 - 23, 1998 Westin Long Beach Hotel Long Beach, CA
Pages:	449 - 457
Cite this article:	Lee, Shane-Woei, van Graas, Frank, "A Preliminary Simulation Result of Integrating A LEO Satellite for Carrier Phase Differential Positioning Systems," Proceedings of the 1998 National Technical Meeting of The Institute of Navigation, Long Beach, CA, January 1998, pp. 449-457.
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