Navigation System Integrity Monitoring Using Redundant Measurements

Mark A. Sturza

Abstract: The advantages of a navigation system that can monitor its own integrity are obvious. Integrity monitoring requires that the navigation system detect faulty measurement sources before they corrupt the outputs. This paper describes a parity approach to measurement error detection when redundant measurements are available. The general form of the detector operating characteristic (DOC) is developed. This equation relates the probability of missed detection to the probability of false alarm, the measurement observation matrix, and the ratio of the detectable bias shift to the standard deviation of the measurement noise. Two applications are presented: Skewed Axis Strapdown Inertial Navigation Systems. DOCs are plotted for several redundant sensor strapdown system configurations. The plots are used to compare the integrity monitoring capabilities of the various configurations. GPS Navigation Sets. DOCs are plotted for GPS navigation sets tracking redundant satellites. The ability of a GPS navigation set to monitor its integrity while meeting non-precision approach requirements is discussed.
Published in: Proceedings of the 1988 National Technical Meeting of The Institute of Navigation
January 26 - 29, 1988
Santa Barbara, CA
Pages: 72 - 79
Cite this article: Sturza, Mark A., "Navigation System Integrity Monitoring Using Redundant Measurements," Proceedings of the 1988 National Technical Meeting of The Institute of Navigation, Santa Barbara, CA, January 1988, pp. 72-79.
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