DERIVATION OF RANGING SOURCE INTEGRITY REQUIREMENTS FOR THE LOCAL AREA AUGMENTATION SYSTEM (LAAS)

R. Braff and C. A. Shively

Peer Reviewed

Abstract: Several satellite latent fault modes can cause errors that may not be removed by pseudorange corrections or detected unless special augmentation-based integrity monitors are employed. The error classes resulting from satellite fault modes are distorted signal waveform, uncorrectable ephemeris error, excessive clock acceleration, excessive code-carrier divergence, and low signal power. This paper derives the integrity monitoring parameters for these errors through mathematical analyses and error-bounding rationales. The integrity parame-ters are the maximum allowable error in the pseudorange corrections and the probability of missed detection of this error. The inputs to the analyses are the integrity monitoring operational requirements contained in the Minimum Aviation System Performance Standards for the Local Area Augmentation System (LAAS). The results of the analyses are used as the basic performance requirements for ranging source integrity monitoring in the FAA’s LAAS Ground Facility specification. The paper includes model derivations and an example application to the signal waveform distortion error class.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 47, Number 4
Pages: 279 - 288
Cite this article: Braff, R., Shively, C. A., "DERIVATION OF RANGING SOURCE INTEGRITY REQUIREMENTS FOR THE LOCAL AREA AUGMENTATION SYSTEM (LAAS)", NAVIGATION, Journal of The Institute of Navigation, Vol. 47, No. 4, Winter 2000-2001, pp. 279-288.
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