PRN Codes for GPS/GLONOSS: A Comparison

Barry A. Stein and Wai L. Tsang

Abstract:	With the current Soviet GLASNOST policy, the Soviet Union is more open about its military satellite navigation system: GLONASS. Technical data on GLONASS have been formally released by the Soviet’s Ministry of Communications with a paper detailing the GLONASS C/A code in May 1988. A paper on GLONASS P code was presented at the Institute of Navigation meeting in September 1989. The scope of this paper is to study the properties of GLONASS pseudorandom number (PRN) sequence codes (i.e., both C/A and P codes). Plausible explanations are offered to rationalize the selection of the PRN codes. Since GLONASS and GPS resemble each other in both shape and form, a comparison to the extent possible, of both the C/A and P codes is performed. Preliminary assessments in terms of merits of their respective PRN codes are presented. With a hydrid GPS/GLONASS operation fast becoming a reality for use by the civil aviation community, implementation issues of the C/A and P codes with commercial off-the-shelf PRN coders are also addressed and presented.
Published in:	Proceedings of the 1990 National Technical Meeting of The Institute of Navigation January 23 - 25, 1990 Princess Resort Hotel San Diego, CA
Pages:	31 - 35
Cite this article:	Stein, Barry A., Tsang, Wai L., "PRN Codes for GPS/GLONOSS: A Comparison," Proceedings of the 1990 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1990, pp. 31-35.
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