GPS Modernization and the Future

Richard Fontana and Donald Latterman

Abstract:	The Global Positioning System (GPS) Modernization Program will evolve the GPS in response to military and civil user’s needs for precise positioning and timing services over the next thirty years. This paper reviews the national level direction, which will guide the GPS Modernization program to provide more capability for the military and civil users. It discusses what the GPS user needs from future signal services and how the evolution of the modernized signal architecture meets these needs. It briefly discusses both the new military m-code and the new second (C/A code on L2) and third (the new civil code on L5) civil signals, with focus on the process to develop the new civil code on L5. This paper summarizes plans to implement these signal services by modifying the Block IIR and Block IIF space vehicles, upgrades to the Operational Control Segment (OCS) and GPS User Equipment, and creation of the next generation of GPS capability, GPS-III. It briefly describes the GPS-III Program, to evaluate, plan, and develop future capability over the next 30 years. This paper concludes by highlighting some challenges to defining and implementing the system architecture that will meet the user’s needs through 2030.
Published in:	Proceedings of the IAIN World Congress and the 56th Annual Meeting of The Institute of Navigation (2000) June 26 - 28, 2000 The Catamaran Resort Hotel San Diego, CA
Pages:	222 - 231
Cite this article:	Fontana, Richard, Latterman, Donald, "GPS Modernization and the Future," Proceedings of the IAIN World Congress and the 56th Annual Meeting of The Institute of Navigation (2000), San Diego, CA, June 2000, pp. 222-231.
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