用拉格朗日多项式内插计算GPS卫星位置

Computing the Location of GPS Satellites by Lagrange Polynomial

介绍了用精密星历通过拉格朗日多项式内插计算GPS卫星轨道位置的方法,并利用IGS跟踪站给出精密星历作为实例进行编程计算,给出了拉格朗日内插法得到的卫星位置误差与多项式阶数的关系,结果表明,用拉格朗日多项式内插法得到的卫星位置精度能够满足精密定位的要求。

The method of computing GPS satellite location using precise ephemeris by Lagrange Polynomial interpolating is introduced in this paper. The relation between satellite point error and polynomial order is presented by an example with the precise ephemeris from IGS track station. The result shows that the precision for satellite location by Lagrange Polynomial interpolating can be meet the needs of precise positioning.