Evaluating the Probability of Correctly Identifying a Fault in GNSS Positioning

Ling Yang, Nathan L. Knight, Jinling Wang

Abstract:	In Global Navigation Satellite System (GNSS) positioning, it is standard practice to apply fault detection after the exclusion of any pseudorange measurements, within a Fault Detection and Exclusion (FDE) procedure, in order to ensure reliable positioning results. Since it is often only necessary to consider a single fault in Receiver Autonomous Integrity Monitoring (RAIM) procedures, it would be ideal if a fault could be correctly identified so that fault detection does not need to be applied in an iterative sense. One way of evaluating if fault detection needs to be reapplied is to determine the probability of a wrong exclusion. To date though limited progress has been made in evaluating such probabilities. In this paper the relationships between different parameters are analysed in terms of the probability of correct and incorrect identification. Using this knowledge, a practical strategy of incorporating the probability of a wrong exclusion into FDE procedure is developed. The theoretical findings are then demonstrated using a GPS single point positioning example.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	2275 - 2284
Cite this article:	Yang, Ling, Knight, Nathan L., Wang, Jinling, "Evaluating the Probability of Correctly Identifying a Fault in GNSS Positioning," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 2275-2284.
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