Integrated INS/GPS/GLONASS Navigation Aid For Manned Space Flight

Alfred Anderman

Abstract:	Alternative combinations of navigation sensors for future manned space flight, such as the proposed NASA Advanced Manned Launch System/Personnel Launch System (AMLS/PLS) are presented in this paper, with special reference to autoland and space rendezvous, berthin dot- king techniques. Integrated INS/GPS sets, using GPS in the differential or relative mode, can saye weight and power in future vehicles, and eventually eliminate the need for MLS and/or rendezvous radars. Integration of the Navstar GPS and the GLONASS svstems is technically feasible. This was demonstrated by the recent development of integrated GPS/GLONASS receivers, with increased availability and reliabilit of the combined, satellite system, to meet FAA and ICAO commercial aviation safety requirements. Both the US Navstar Global Positioning System (GPS) and the USSR Global Navigation System (GLONASS) will provide users with consistent global coverage position fixing. However the problem is that neither system can be certified as a sole source navigation system because not enough satellites will be in view of vehicular receivers at any one time to satisfy the requisite redundancy and system monitoring standards of the FAA and ICAO. A hybrid receiver using signals from the combined satellites of both GPS and GLONASS will overcome the the coverage shortage in either system. Results of recent test flights confirm technical feasibility for precision landing approaches, calibration, standardization, and organization issues remain to be resolved in various political, diplomatic, and international arenas, before acceptance as sole means navigation system in controlled airspace is likely to occur.
Published in:	Proceedings of the 1991 National Technical Meeting of The Institute of Navigation January 22 - 24, 1991 Sheraton San Marcos Hotel Phoenix, AZ
Pages:	277 - 286
Cite this article:	Anderman, Alfred, "Integrated INS/GPS/GLONASS Navigation Aid For Manned Space Flight," Proceedings of the 1991 National Technical Meeting of The Institute of Navigation, Phoenix, AZ, January 1991, pp. 277-286.
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