COMPARATIVE ANALYSIS ON TWO METHODS FOR IGS PRECISE EPHEMERIS INTERPOLATION
两种IGS精密星历插值方法的比较分析

On the basis of the periodicity of the designed orbit of GPS satellite,trigonometric function polynomial interpolation method is used to interpolate the IGS precise ephemeris.Besides,the accuracies of interpolation and extrapolation of trigonometric function polynomial interpolation are compared with classic Lagrange interpolation.The result indicates that the former can provide higher accuracy and is more stable.