摘要
对GPS卫星精密星历Lagrange插值、Neville插值、Chebyshev多项式拟合以及Legendre多项式拟合算法进行了比较分析。结果表明,插值算法在8阶时计算精度最高,拟合算法最佳阶数为9;相同阶次的插值算法精度相同,相同阶次的拟合算法精度相同;相同阶次的拟合算法适用的历元时段较插值算法长。
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.
出处
《大地测量与地球动力学》
CSCD
北大核心
2008年第2期77-80,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(50278042)
