Feasibility of Achieving GBAS Category II/III Continuity

Rick Cassell, Victor Wullschleger and Jason Burns

Abstract:	This paper describes proposed requirements for Ground Based Augmentation Systems (GBAS) Category II/III continuity, and presents the results of a feasibility analysis for meeting the requirements. GBAS will have to provide equivalent levels of safety and reliability to the current Category II/III Instrument Landing Systems (ILS). Achieving the stringent Category II/III continuity requirements involves some unique challenges for GBAS. Unlike ILS, GBAS includes a satellite constellation, which contributes to the continuity achieved for the operation. The analysis presented here will examine how a GBAS ground system architecture can provide adequate continuity to support Category II/III operations in conjunction with properly equipped aircraft. This includes not only adding sufficient redundancy in the ground equipment, but also includes changes to meet more stringent integrity and monitoring requirements. The paper will describe recommended allocations of key requirements.
Published in:	Proceedings of the 63rd Annual Meeting of The Institute of Navigation (2007) April 23 - 25, 2007 Royal Sonesta Hotel Cambridge, MA
Pages:	383 - 388
Cite this article:	Cassell, Rick, Wullschleger, Victor, Burns, Jason, "Feasibility of Achieving GBAS Category II/III Continuity," Proceedings of the 63rd Annual Meeting of The Institute of Navigation (2007), Cambridge, MA, April 2007, pp. 383-388.
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