GPS and GLONASS Visibility Characteristics and Performance Data of the 3S Navigation R-100 Integrated GPS/GLONASS Receiver

Jacques Beser

Abstract:	When fully deployed, each of the GPS and GLONASS constellations will consist of up to 24 satellites. Although there are several similarities between both systems, the availability characteris- tics of each are sufficiently different to affect operations. Specifically, the GLONASS 3-plane versus GPS 6-plane con- stellations and the differing inclina- tions offer distinct availability fea- tures as a function of latitude, with GLONASS favoring the extreme latitudes while GPS favors the mid latitudes. This effect gets more pronounced as mask angles increase. This paper pre- sents the results of simulations uti- lizing representative fully deployed GPS and GLONASS constellations. Several locations and mask angles are consid- ered. This points out that a receiver able to operate with both GPS and GLONASS would offer the best of both worlds, with one system making up for the shortcomings of the other. It also points out the limitations of GPS at extreme latitudes when masking is en- countered. Further, the increased availability of satellites would make the implementation of an integrity scheme much easier and improve its ef- fectiveness. This increased system availability, coupled with enhanced in- tegrity should go a long way toward ac- ceptance of the Global Navigation Satellite System (GNSS) by the marine and aviation communities. The paper also provides a description of the 3s Navigation R-100 GPS/GLONASS receiver and presents performance data.
Published in:	Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992) September 16 - 18, 1992 Albuquerque, NM
Pages:	187 - 205
Cite this article:	Beser, Jacques, "GPS and GLONASS Visibility Characteristics and Performance Data of the 3S Navigation R-100 Integrated GPS/GLONASS Receiver," Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992), Albuquerque, NM, September 1992, pp. 187-205.
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