Helicopter Flight Test Demonstration of Differential GPS

Robert P. Denaro, Jaques Beser

Abstract:	An off-line post-mission processing facility is being established by NASA Ames Research Center to analyze differential GPS flight tests. The current and future differential systems are described, comprising an airborne segment in an SH-3 helicopter, a GPS ground reference station, and a tracking system. The post-mission processing system provides for extensive measurement analysis and differential computation. Both differential range residual corrections and navigation corrections are possible. Some preliminary flight tests were conducted in a landing approach scenario and statically. Initial findings indicate the possible need for filter matching between airborne and ground systems (if used in a navigation correction technique), the advisability of correction smoothing ·before airborne incorporation, and the insensitivity of accuracy to either of the differential techniques or to update rates.
Published in:	Proceedings of the 1985 National Technical Meeting of The Institute of Navigation January 15 - 17, 1985 San Diego, CA
Pages:	116 - 121
Cite this article:	Denaro, Robert P., Beser, Jaques, "Helicopter Flight Test Demonstration of Differential GPS," Proceedings of the 1985 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1985, pp. 116-121.
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