On Combined Application of GLONASS and GPS Systems In Conditions of Limited Observability of Navigation Satellites

S.Averin, V.Vinogradov, N.Ivanov, V.Salischev

Abstract:	Complete deployment of GLONASS and GPS systems creates additional advantages for the world user community by improving reliability, integrity, accuracy of position and velocity determinations. Very often GLONASS and GPS users have to operate in a location with limited possibilities for receiving signals from navigation satellites, e.g. in urban or mountainous areas, during aircraft manoeuvres, and during determination of the state vector of geostationary satellite, etc. In such situations combined use of GLONASS and GPS navigation signals would significantly improve the quality of navigation. When GLONASS and GPS are used together, there is a need to determine additional unknown parameter - an offset between the GLONASS and GPS navigation time scales. This degrades the potential accuracy achievable with GLONASWGPS combined application, Implementation of plans to transmit a GLONASWGPS time scale offset within the navigation messages of modernized GLONASS-M satellites would help to improve user navigation accuracy, especially in poor observation conditions. In this paper an example of a geostationary satellite is used to demonstrate advantages of the GLONASYGPS combined application, when the GLONASYGPS system time offset is known. Also some aspects are discussed, concerning determination of the state vector of a geostationary satellite with help of the GLONASS and GPS navigation systems.
Published in:	Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996) September 17 - 20, 1996 Kansas City, MO
Pages:	287 - 295
Cite this article:	S.Averin,, V.Vinogradov,, N.Ivanov,, V.Salischev,, "On Combined Application of GLONASS and GPS Systems In Conditions of Limited Observability of Navigation Satellites," Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996), Kansas City, MO, September 1996, pp. 287-295.
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