Satellite and Terrestrial Radionavigation - A Partnership

Andrew Stratton

Abstract:	The advent of satellite radionavigation, has brought about a dramatic increase in the potential of radionavigation leading to the presumption that a Global Navigation Satellite System (GNSS) will become the sole radionavigation aid. The problems, however, that the international navigation community are facing in funding and operating a GNSS, and the role in such a system of the Global Positioning System (GPS) and GLONASS, developed and operated for national defence purposes, are becoming increasingly complex. The need to increase the number of space vehicles. above the 24 of either GPS, or GLONASS, alone, or some other form of augmenting the satellite signals, has led to a range of options, of as yet unknown cost. If GNSS were to replace MLS as the Precision Approach aid wide area Differential Satellite Navigation (DSN), which negates GPS Selective Availability, would be required and the defence implications for the USA are causing increasing concern. The objectives for a Global Navigation System (GNS) may be simply stated as the provision for all users air, sea and land wherever they may be on or above thesurface of the globe, or beneath the sea, with the navigation means of going about their business in a safe and economic manner. Starting from this requirement, the paper examines the properties of satellite and terrestrial radionavigation systems. It then sets out an alternative scenario using satellite and terrestrial radionavigation transmissions in partnership, as a more cost-effective solution to a GNS, that should be globally politically acceptable and organisationally achievable. A role is identified for the Navigation Associations and Institutes of the world whilst continuing to foster the advancement of satellite navigation technology, to give greater priority to advancing the understanding of the relationship between satellite-based and ground- based radionavigation transmissions, and the contribution that both can make to navigation safety and the economics of the users.
Published in:	Proceedings of the 1994 National Technical Meeting of The Institute of Navigation January 24 - 26, 1994 Catamaran Resort Hotel San Diego, CA
Pages:	209 - 218
Cite this article:	Stratton, Andrew, "Satellite and Terrestrial Radionavigation - A Partnership," Proceedings of the 1994 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1994, pp. 209-218.
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