卫星坐标的内插和拟合

On calculating coordinates of satellites by lagrange interpolation and chebyshev polynomial simulation

卫星坐标的计算是GPS数据处理的一个基本步骤,影响着GPS数据处理的效率。本文对GPS数据处理中常用的拉格朗日内插和切比雪夫多项式拟合从原理上进行了阐述,并对广播星历卫星坐标计算和精密星历卫星坐标计算进行了分析比较,结合具体算例,得出了几点有意义的结论。

Calculating coordinates of satellite is a basic step in GPS data process and effects the efficiency of GPS data process. In this paper, two algorithms are explained on principle, which are La-grange Interplation and Chebyshev polynomial simulation. Then comparisons of calculating of satellite ' coordinate with broadcast ephemeris and with precise ephemeris are made. In the end, some numerical results and analysis are given.