Influence of Pseudorange Accuracy on Phase Ambiguity Resolution in Various GPS Modernization Scenarios

Dennis Milbert

Peer Reviewed

Abstract:	A simulation to examine the success rate of single-epoch ambiguity resolution under varying levels of pseudorange accuracy was conducted with a hypothetical 12-satellite-in-view Global Navigation Satellite System (GNSS) configuration. Scenarios were run with no atmospheric error (short baseline), with ionosphere error, and with ionosphere and troposphere error contributions (long baseline). Additional calibrations and supporting model data were simulated by adding appropriate weights. The long-baseline scenarios were extremely sensitive to the inclusion of ionosphere model data, and were also aided by the inclusion of troposphere data.When aided by such data, success rates for single-epoch ambiguity resolution of 95 – 97 percent were obtained with a 10 –20 cm pseudorange root mean square (RMS).
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 52, Number 1
Pages:	29 - 38
Cite this article:	Milbert, Dennis, "Influence of Pseudorange Accuracy on Phase Ambiguity Resolution in Various GPS Modernization Scenarios", NAVIGATION: Journal of The Institute of Navigation, Vol. 52, No. 1, Spring 2005, pp. 29-38.
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