Ionospheric Correction Improvements for Single Frequency GPS Receivers

Andrew Brown, Aleksandar Jovancevic, Suman Ganguly, Michael Kirchner and Slavisa Zigic

Abstract:	The dilution of precision (DOP) error currently introduced by the Ionosphere is the single largest source of error for single frequency GPS receivers. Current techniques for reducing this error in single frequency receivers utilize a thin shell model of the Ionosphere in conjunction with an obliquity factor. These methods contain a systematic error resulting from the height distribution of the electron density in the Ionosphere. A new technique is introduced that allows for compensation for varying height profiles of the Ionosphere while maintaining compatibility with current thin shell models. This method utilizes an effective shell height model in conjunction with the current electron density shell models to provide superior estimation of the Ionospheric contribution to the GPS signal delay.
Published in:	Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001) June 11 - 13, 2001 Albuquerque, NM
Pages:	376 - 381
Cite this article:	Brown, Andrew, Jovancevic, Aleksandar, Ganguly, Suman, Kirchner, Michael, Zigic, Slavisa, "Ionospheric Correction Improvements for Single Frequency GPS Receivers," Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001), Albuquerque, NM, June 2001, pp. 376-381.
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