The Design and Application of a GPS Integrity Model

Rob Conley and Andy Wilfong

Abstract:	Analysis of GPS capabilities to support national integrity requirements is at best a complex task. This complexity is driven by the number of variables defining the problem, and their inter-relationships with each other. Since GPS integrity is such a critical issue, it becomes very important to analyze the technical problems associated with integrity from a system perspective. This paper addresses a structured modeling and analysis process for evaluating the integrity support capabilities of any GPS integrity assurance system. The integrity model as described is based upon the analysis approach used in the extensive DOD integrity study completed by IBM and Overlook in January 1991. * The paper summarizes the key algorithms in the integrity model, and describes the processing flow, from the definition of input variables to the output of model results. The capabilities of the model are demonstrated in the paper, with an assessment of current GPS baseline integrity for SPS and PPS users.
Published in:	Proceedings of the 4th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1991) September 11 - 13, 1991 Albuquerque, NM
Pages:	739 - 752
Cite this article:	Conley, Rob, Wilfong, Andy, "The Design and Application of a GPS Integrity Model," Proceedings of the 4th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1991), Albuquerque, NM, September 1991, pp. 739-752.
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