Status of RTCA Activities for the Future GPS Signal at L5

Chris Hegarty, Swen Ericson, A.J. Van Dierendonck, Gary McGraw, Peter Fyfe and Karl Kovach

Abstract:	Last year, RTCA Special Committee 159 (SC159) Working Group 1 (WG1) led the development of a signal structure for the future GPS signal at L5 (1176.45 MHz). At that time, that development was limited to the definition of pseudorandom noise (PRN) code generation and signal modulation. Development of other signal characteristics was postponed. Since then, many of these other signal characteristics have been developed and/or refined. These other characteristics include the definition of the navigation messages, the addition of code modulation on the data-free channel and the assignment of PRN codes. Except for some characteristics influenced by the actual GPS satellite design, the L5 signal development has now been completed. In addition, an L5 Signal Specification is being published by RTCA. In this paper we present an overview of the L5 signal characteristics, with a focus on recent (past year) changes.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	2130 - 2139
Cite this article:	Hegarty, Chris, Ericson, Swen, Van Dierendonck, A.J., McGraw, Gary, Fyfe, Peter, Kovach, Karl, "Status of RTCA Activities for the Future GPS Signal at L5," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 2130-2139.
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