Accuracy Analysis of Carrier Phase Aided Ionosphere Estimates Based on a Regional GPS Network

Y. Gao and X. Liao

Abstract:	This paper investigates a method for ionosphere modeling using carrier phase aided ionosphere measurements from a regional area GPS network. A procedure has been described to use carrier-derived ionosphere to improve the code-derived ionosphere estimates. Based on a singlelayer ionosphere grid model, the vertical TECs are estimated along with satellite/receiver inter-frequency biases using a streamlined Kalman filter. With data from a regional GPS network, the results indicated that the filter is very stable and the standard deviation of the ionosphere estimates is at the level of centimeters. The proposed method can be used for real-time computation of ionosphere corrections to support regional differential GPS positioning and navigation.
Published in:	Proceedings of the IAIN World Congress and the 56th Annual Meeting of The Institute of Navigation (2000) June 26 - 28, 2000 The Catamaran Resort Hotel San Diego, CA
Pages:	417 - 422
Cite this article:	Gao, Y., Liao, X., "Accuracy Analysis of Carrier Phase Aided Ionosphere Estimates Based on a Regional GPS Network," Proceedings of the IAIN World Congress and the 56th Annual Meeting of The Institute of Navigation (2000), San Diego, CA, June 2000, pp. 417-422.
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