Efficient Satellite Orbit Approximation

Paula Korvenoja and Robert Piche

Abstract:	In order to speed up satellite position and velocity computation, the ephemeris orbit model is approximated by simple curves. Piecewise polynomial interpolation is shown to be appropriate for the purpose, and especially splines and Hermite polynomials of different degrees and sampling intervals are compared. Cubic Hermite interpolation, along with its other beneficial properties, attains more than tenfold efficiency compared to ephemeris evaluation.
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:	1930 - 1937
Cite this article:	Korvenoja, Paula, Piche, Robert, "Efficient Satellite Orbit Approximation," 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. 1930-1937.
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