Generalized Divergence-Free Carrier Smoothing with Applications to Dual Frequency Differential GPS

Gary A. McGraw

Peer Reviewed

Abstract:	This paper develops a "Generalized Divergence-Free Smoothing"" (GDFS) framework for carrier phase smoothing of Global Positioning System (GPS) pseudorange measurements. This framework encompasses widely-known dual frequency smoothing techniques and shows there is a continuum of possible smoothing configurations. When incorporated into Differential GPS (DGPS) architectures, this GDFS approach can be exploited to achieve specific objectives, such as minimum pseudorange errors, ionosphere-free measurements, or integer ambiguity resolution. A flexible DGPS architecture based on GDFS processing is presented. The GDFS framework also provides a methodology for evaluating the performance of signal combinations for modernized Global Navigation Satellite Systems.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 56, Number 2
Pages:	115 - 122
Cite this article:	McGraw, Gary A., "Generalized Divergence-Free Carrier Smoothing with Applications to Dual Frequency Differential GPS", NAVIGATION: Journal of The Institute of Navigation, Vol. 56, No. 2, Summer 2009, pp. 115-122.
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