LAAS Signal-in-Space Integrity Monitoring Description and Verification Plan

Fan Liu, Tim Murphy, Trent A. Skidmore

Abstract:	The Federal Aviation Administration’s (FAA) Local Area Augmentation System (LAAS) is being designed to improve the accuracy, integrity, continuity, and availability of Global Positioning System (GPS) for all phases of precision approach and landing. Presently, the LAAS architecture is being developed by the FAA LAAS Team in conjunction with RTCA. A critical component of the LAAS architecture is the integrity monitoring methodology used to guarantee the performance of the LAAS signal-in-space (SIS). Monitoring methodologies for DGPS-based precision approaches have been a hotly debated issue for several years. This paper presents an overview of the LAAS signal-in-space integrity monitoring system, and the theoretical basis of the baseline Vertical/Lateral Protection Level (VPL/LPL) algorithms recently selected by RTCA Special Committee 159 (SC-159) (Working Group 4) for the LAAS. Both theoretical analyses and software simulations are conducted to verify the performance of the VPL/LPL algorithms in fault-free case. Procedures of the ground signal processing and its effect are discussed. Finally, possible modifications to the present algorithms are suggested.
Published in:	Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997) September 16 - 19, 1997 Kansas City, MO
Pages:	485 - 497
Cite this article:	Liu, Fan, Murphy, Tim, Skidmore, Trent A., "LAAS Signal-in-Space Integrity Monitoring Description and Verification Plan," Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997), Kansas City, MO, September 1997, pp. 485-497.
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