Development of High-Rate Differential GPS Reference for Operational Testing

William Mossle and Andy Chasko

Abstract:	In response to increasingly stringent flight test requirements of GPS integrated navigation systems, the 746th Test Squadron (746 TS), also known as the Central Inertial Guidance Test Facility (CIGTF), has developed a high-rate Differential GPS (HR-DGPS) Time-Space- Positioning-Information (TSPI) truth reference system. This system provides high-rate (20 Hz) TSPI without significant platform modifications or implementation of costly range reference trackers. The HR-DGPS reference has been developed for aircraft weapon delivery testing which has a requirement for high-rate, high accuracy TSPI. The HR-DGPS utilizes Space and Control Segment Observed Range Errors (ORE) produced from the 746 TS Test Support Network (TSN) DGPS ground stations. The HR-DGPS algorithm processes GPS- corrected Inertial Navigation System (INS) data to attain the high-rate. Validation and flight test results demonstrate both the accuracy and independence of the HR-DGPS system. The development of HR-DGPS TSPI is a large step forward in matching the quality and low- cost of differential GPS reference technology to the stringent requirements of military aircraft flight testing.
Published in:	Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA
Pages:	1637 - 1644
Cite this article:	Mossle, William, Chasko, Andy, "Development of High-Rate Differential GPS Reference for Operational Testing," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 1637-1644.
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