Aircraft Integration of GNSS-Based Landing Systems

D. Alexander Stratton and Daryl L. McCall

Abstract:	This paper describes aircraft integration approaches for GPS- based Landing Systems (GLS) to provide precision approach and landing capability in low-visibility conditions. Methods for airborne failure monitoring and detection are investigated to meet critical aircraft integrity and continuity requirements. Problems with re-use of existing ILS monitor designs for GLS, which stem from unique GLS error sources, are described. A performance-based monitoring scheme is proposed which maintains guidance error within acceptable limits while accounting for GLS-specific error characteristics. Performance-based monitoring is analyzed using satellite constellation simulations along with alternative techniques. The sensitivity of the monitor designs to non- steady-state tracking conditions is evaluated. An example dual-dual aircraft installation is shown to be capable of meeting integrity and continuity requirements if the GLS sensors utilize performance-based monitoring.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	1245 - 1253
Cite this article:	Stratton, D. Alexander, McCall, Daryl L., "Aircraft Integration of GNSS-Based Landing Systems," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 1245-1253.
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