NAVSTAR GPS and GLONASS - Competitors or Initial Elements of a Future Civil GNSS

Stefan Vieweg, Wolfgang Lechner

Abstract:	NAVSTAR GPS is looking forward to the operational phase in the next future, GLONASS is expected to be on the same direction with a delay of about two years. Both systems provide excellent positioning capabilities and have demonstrated accuracies which meets nearly all requirements in all areas of application. But, due to the military control of both systems, the in- ternational community, especially those who are respon- sible for safety-of-live operations, have more and more concern whether those systems could be used for inter- nationally standardized applications like civil aviation. Besides these institutional uncertainties, there are a lot of questions on the technical level, which indicate, that neither GPS nor GLONASS would satisfy all user requi- rements. Reliability and integrity are some of the key words which have to be discussed in this context. The paper will describe critical facts which possibly hin- der the international acceptance of GPS and GLONASS for safety-of-live operations and will show ways how to solve the technical and institutional problems. Especially the combined use of GPS and GLONASS, GPS/GLONASS integration with inertial systems and possibilities of an European involvement in a future civil GNSS space and control segment will be discussed.
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:	503 - 509
Cite this article:	Vieweg, Stefan, Lechner, Wolfgang, "NAVSTAR GPS and GLONASS - Competitors or Initial Elements of a Future Civil GNSS," Proceedings of the 1994 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1994, pp. 503-509.
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