Research on position interpolation of BDS-3 satellite

doi:10.13474/j.cnki.11-2246.2021.371

Abstract

Abstract: In view of the problem that BeiDou precise ephemeris can only provide discrete three-dimensional coordinates and can not provide satellite position at any time, this paper proposes to use interpolation method to calculate the satellite position at any time, which includes Lagrange interpolation method, polynomial fitting method, piecewise linear interpolation method and radial basis function fitting method to interpolate the precise ephemeris of BDS-3 satellite. The experimental results show that, Lagrange interpolation method and polynomial fitting method can well interpolate the position coordinates of BDS-3. The X-direction position of the satellite carrying CZ-3A launch vehicle and the z-direction position of the satellite carrying the CZ-3C launch vehicle are solved by Lagrange interpolation method, and the other position directions are solved by polynomial fitting method.

Key words: Lagrange interpolation, RBF fitting, polynomial fitting, piecewise linear interpolation

CLC Number:

P228

WANG Jianmin, LI Te. Research on position interpolation of BDS-3 satellite[J]. Bulletin of Surveying and Mapping, 2021, 0(12): 50-53.

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