A. F. Norwood

Peer Reviewed

Abstract: Technology is available to reduce the costs and improve the integrity of navigating high performance aircraft in today’s, as well as tomorrow’s, air trafhc control (ATC) environment. Digital electronics, Omega and other very low frequency (VLF) systems, accelerated computer technology, and improved inertial sensors have all increased the options of the airplane system engineer. But this engineer is not only concerned with the airborne equipment he must specify in order to satisfy detailed in-flight functions, he needs also to understand the available ground-based aids, the ATC environment, the impact of the specified navigation system upon airplane performance, the projected capability of other common airspace users, and the installation of airplane interface problems. As the number of options increases, the tendency is to view each subsystem as more specialized and applicable to only limited phases of flight. Consequently, ground and airborne systems have proliferated. The airplane system engineer can attack this trend most directly by careful analysis of self-contained systems and data processing requirements. He has little freedom with those systems that are integral to the ATC system and rely on ground-based aids, especially where the latter form the basis of air route networks. This paper discusses the development of air navigation system requirements, the selection of subsystems, and the cost trades of self-contained airborne elements. The perspective is that of an airplane system engineer who must commit to a system design that will best satisfy navigation functional and performance requirements for a new aircraft destined to operate for the next 20 to 25 years in an ATC environment subject to changes.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 22, Number 1
Pages: 68 - 75
Cite this article: Norwood, A. F., "DEVELOPMENT OF NAVIGATION SYSTEMS FOR ADVANCED COMMERCIAL TRANSPORTS", NAVIGATION, Journal of The Institute of Navigation, Vol. 22, No. 1, Spring 1975, pp. 68-75.
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