摘要
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。利用切比雪夫多项式拟合广播星历的卫星坐标 ,以实现卫星轨道的标准化。通过实例分析了用切比雪夫多项式进行卫星坐标拟合的精度及多项式阶数和时间间隔的合理选择等问题 。
It is important to get satellite coordinates continually in GPS positioning. Real time satellite coordinates can be gained according to broadcast ephemeris received. A great deal of memory is required in order to get satellite coordinates. The Chebyshev polynomial was applied to fit satellite coordinates of the broadcast ephemeris to realize satellite orbit standardization. The precision in fitting satellite coordinates of broadcast ephemeris by the Chebyshev polynomial and the rational choice of polynomial orders of and time intervals are analyzed. Some meaningful conclusions are made.
出处
《气象科技》
北大核心
2004年第3期198-200,F004,共4页
Meteorological Science and Technology
