The Ace-Q-Point DGPS System

Paul H. Galyean

Abstract:	Act-Q-Point is a differential GPS system based on FM subcarriers. Widespread FM signal coverage and low cost receiver technology make FM subcarriers an attractive communications channel for DGPS corrections. The AccQ-Point DGPS System is being deployed in three phases. In Phase 1, single frequency reference receivers serve discrete local areas. Two levels of service which vary in accuracy and cost are offered. In Phase 2, measurements from a North American network of dual frequency receivers will be used to create a wide area DGPS system with satellite distribution of information to FM stations. In Phase 3, additional high accuracy service levels will be added to the Act-Q-Point system. This paper outlines the three phases and details the architecture of the Phase 1 system which is based on discrete sites.
Published in:	Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993) September 22 - 24, 1993 Salt Palace Convention Center Salt Lake City, UT
Pages:	1273 - 1283
Cite this article:	Galyean, Paul H., "The Ace-Q-Point DGPS System," Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993), Salt Lake City, UT, September 1993, pp. 1273-1283.
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