Worst Case GPS Integrity Monitoring

Donald Benson Jr.

Abstract:	A technique is developed in this paper to set thresholds and evaluate integrity monitoring performance based on worst case analysis. The worst case methods described here assume that the healthy satellites can have errors over a finite range, and then solves the following problems. What are the smallest and largest error magnitudes a satellite in question can have to cause the threshold to just be equaled (set off an alarm)? In this framework, setting thresholds and evaluating performance of integrity monitoring do not depend upon probability distributions. Based on likelihood functions or least squares a quadratic decision function is used. With this decision function, the paper shows estimation residuals or raw data yield identical results. Integrity monitoring thresholds and performance evaluation can be based on noise models; thus the measurements and state vector do not have to be simulated.
Published in:	Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA
Pages:	2023 - 2031
Cite this article:	Benson, Donald, Jr., "Worst Case GPS Integrity Monitoring," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 2023-2031.
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