Hybrid Mode Satellite Radiodetermination

George V. Kinal

Abstract:	Satellite radiodetermination systems which are based on active (transmitting) users, two-way ranging, and calculation of users' positions at a central facility have the advantage over passive radionavigation systems in that the central facility is able to perform relative positioning among the users, and may employ benchmark differential corrections to improve accuracy. However, passive techniques appear to be more suitable for most mobile users. In this paper a hybrid technique which employs passive measurements in conjunction with centralized calculations of positions is described. This technique fits well within an evolutionary scenario wherein INMARSAT begins by offering position reporting (dependent surveillance) services, then expands to include the hybrid service (in conjunction with GPS and possibly GLONASS signals), and still later is able to provide a full range of communications, navigation, and surveillance services.
Published in:	Proceedings of the 44th Annual Meeting of The Institute of Navigation (1988) June 21 - 23, 1988 U.S. Naval Academy Annapolis, Maryland
Pages:	67 - 71
Cite this article:	Kinal, George V., "Hybrid Mode Satellite Radiodetermination," Proceedings of the 44th Annual Meeting of The Institute of Navigation (1988), Annapolis, Maryland, June 1988, pp. 67-71.
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