COMPARISON OF INTERPOLATING AND FITTING IGS PRECISE EPHEMERIS
Li Mingfeng; Jiang Guoyan ;and Zhang Kai
College of Civil Engineering, Nanjing University of Technology, Nanjing 210009
Abstract The principles of Lagrange interpolation, Neville interpolation, Chebyshev polynomial fitting and Legendre polynomial fitting were analysized compared with each other. The results indicate that the best orders of interpolating algorithm and fitting algorithm are 8 and 9 respecdively and each algorithm has the same accuracy when their orders are the same. Besides,the stage of epoch which fitting algorithm is suitable to is longer than that for interpolating algorithm in the same order.
Key words ：
precise ephemeris
Lagrange interpolation
Neville interpolation
Chebyshev polynomial fitting
Legendre polynomial fitting
Received: 01 January 1900
Corresponding Authors:
Li Mingfeng
Cite this article:
Li Mingfeng,Jiang Guoyan,and Zhang Kai. COMPARISON OF INTERPOLATING AND FITTING IGS PRECISE EPHEMERIS[J]. , 2008, 28(2): 77-80.
Li Mingfeng,Jiang Guoyan,and Zhang Kai. COMPARISON OF INTERPOLATING AND FITTING IGS PRECISE EPHEMERIS[J]. jgg, 2008, 28(2): 77-80.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2008/V28/I2/77
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