Demonstrating GPS Attitude Determination from UoSat-12 Flight Data

S. Purivigraipong, M.J. Unwin and Y. Hashida

Abstract:	This paper presents the results of GPS (Global Positioning System) attitude determination from phase difference data logged on the UoSat-12 mini-satellite. The developed algorithm for resolving integer ambiguities in the carrier phase differences is tested to achieve instantaneous attitude from a set of only four measurements collected from two antenna baselines. A quaternion estimator based on a standard extended Kalman filter (qEKF) uses all GPS measurements to enable continued attitude determination taking into account the spacecraft dynamics. The attitude information derived from on-board magnetometers and a horizon sensor is used to evaluate the results of GPS attitude determination.
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:	2625 - 2633
Cite this article:	Purivigraipong, S., Unwin, M.J., Hashida, Y., "Demonstrating GPS Attitude Determination from UoSat-12 Flight Data," 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. 2625-2633.
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