Three Interpolation Methods for Precise Ephemeris and Clock Offset of GPS Satellite

Two common sleek interpolation methods,Lagrange interpolation and Newton interpolation,for Precise Ephemeris and clock offset of GPS satellite are presented.The results calculated by these two methods and linear interpolation method show that the sleek algorithm can get higher precision.Additionally,Newton interpolation and linear interpolation can obtain the same precision efficiently for interpolating precise ephemeris and clock offset in practice.