卫星轨道标准化及其算法实现

The Algorithm Implementation of Standardization of Orbitsof GPS Satellites

在GPS定位中需要不断地计算卫星的坐标,实时的卫星坐标是根据接收到的广播星历来计算的,而每次计算卫星坐标都需要占用大量内存,影响计算速度。根据GPS卫星轨道标准化的必要性及要求,本文简要介绍了轨道标准化的原理和算法,并通过实例分析了利用切比雪夫多项式进行GPS卫星轨道标准化的精度,拟合时间间隔及节点数选取等问题,得出了一些有益的结论。

It is necessary to get satellite coordinates continually in GPS positioning. Real time satellite coordinates can be gained according to broadcast ephemeris received, but this process need a great deal of memory. According to the necessity and requirements for the standardization of orbits of GPS satellites, this paper briefly introduced the Principle and algorithm of Standardization; analyzed problems such as accuracy, rational time interval in the standardization by giving examples and gained some useful conclusions.