Ways to Improve RAIM/AAIM Availability Using Position Domain Performance Computations

P.B. Ober

Abstract:	This paper discusses the performance of RAIMIAAIM in terms of the probabilities of missed and false detection of a position error of the navigator. The statistical indepen- dence of position error and test statistic is exploited to compute missed and false detection probabilities from the distributions of position error and test statistic straight- forwardly. We compute exact probabilities and computationally less involved approximations, as well as the probabilities that are obtained when using a conventional method [Leva96] that works in the measurement rather than the position domain. The results of the latter prove to be too pessimistic, and will therefore result in reduced RAIMIAAIM availability. We also show that representing the measurement geometry by the worst integrity measurement only, as is often done, is disadvantageous with respect to RAIM/AAIM availability.
Published in:	Proceedings of the 1997 National Technical Meeting of The Institute of Navigation January 14 - 16, 1997 Loews Santa Monica Hotel Santa Monica, CA
Pages:	485 - 497
Cite this article:	Ober, P.B., "Ways to Improve RAIM/AAIM Availability Using Position Domain Performance Computations," Proceedings of the 1997 National Technical Meeting of The Institute of Navigation, Santa Monica, CA, January 1997, pp. 485-497.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In