Synergy of CP-DGPS, Accelerometry and Magnetic Sensors for Precise Trajectography in Ski Racing

J. Skaloud, P. Limpach

Abstract:	This paper presents the conceptual and technical aspects of a system in development that precisely determines athlete's trajectory through a course. Carrier phase-based (CP-DGPS) positioning represents core of the system, while tri-axial accelerometer and magnetic sensors act as an autonomous aid that offers instantaneous attitude determination and can potentially help when navigating through GPS signal blackout zones. Trajectory representation by a set of continuous functions with geometrical constrains supplies an effective tool that removes outliers and discontinuities in the positioning and offers better base for deriving acceleration profiles. Successfully tested in competitive skiing, the concept is also applicable in other fields for tracking objects on restricted trajectory.
Published in:	Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003) September 9 - 12, 2003 Oregon Convention Center Portland, OR
Pages:	2173 - 2181
Cite this article:	Skaloud, J., Limpach, P., "Synergy of CP-DGPS, Accelerometry and Magnetic Sensors for Precise Trajectography in Ski Racing," Proceedings of the 16th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS/GNSS 2003), Portland, OR, September 2003, pp. 2173-2181.
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