Analysis of Risk Affecting lntegrity and Continuity

Jizhang Sang, Kurt Kubik, and Yanming Feng

Abstract:	ln [ 11, integrity, continuity and accuracy of the system are defined to meet the requirement that the probability of any part of the aircraft leaving the tunnel without warning shall be less than 1 in 10’ approaches. This requires an integrity risk of 6~10~ and continuity risk of 2x10-’ per approach in the aircraft component. The parameters inlluencing the airborne subsystem risk probability are tunnel dimension, the flight technical error0 and the navigation system error(NSE). This study is directed in particular toward a first critical examination of treatment of above parameters. A new approach is proposed in this paper to compute the airborne subsystem risk probabilities of integrity and continuity in a rigorous way based on the Joint probability distribution of NSE and FTE. This approach gives significantly different results from [l]. It is also shown that the probability of exceeding an alarm limit is significantly different from the probability of being outside the alarm limit. Thus, the computation of the SCAT-I risk probability as given in [l] should be reviewed.
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:	2033 - 2040
Cite this article:	Sang, Jizhang, Kubik, Kurt, Feng, Yanming, "Analysis of Risk Affecting lntegrity and Continuity," 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. 2033-2040.
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