Single Points of Failure in Complex Aviation CNS Systems and Possible Options for Reducing the Exposure to Them

Michael JA Asbury, Rolf Johannessen

Abstract:	State of the art avionics achieves very good reliability and the electronics in the current generation of communication and navigation satellites is sufficiently good to allow a design life around 10 years. Nevertheless, failures will arise. The purpose of failure analysis is to identify the consequences if a particular module does encounter a failure, and to ensure that by system redundancy, or by operational procedures the effect and/or its probability of occurrence will be acceptable. This paper is a contribution to the discussion on the strength and weakness of redundancy in satellite based Communication, Navigation and Surveillance (CNS) systems as planned by the International Civil Aviation Organisation (ICAO) to be an integral part of the future air navigation system. The paper also makes a comparison with today’s terrestrial based systems.
Published in:	Proceedings of the 50th Annual Meeting of The Institute of Navigation (1994) June 6 - 8, 1994 Antlers Doubletree Hotel Colorado Springs, CO
Pages:	319 - 330
Cite this article:	Asbury, Michael JA, Johannessen, Rolf, "Single Points of Failure in Complex Aviation CNS Systems and Possible Options for Reducing the Exposure to Them," Proceedings of the 50th Annual Meeting of The Institute of Navigation (1994), Colorado Springs, CO, June 1994, pp. 319-330.
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