Both the characteristics of Lagrange interpolation and Neville interpolation are compared with each other. It is concluded from the results that the high-order interpolation is not good enough for high-precise applications. Finally, a new interpolation method which based on high/low orders to solve this problem is put forth.%采用Lagrange插值与线性逐次Neville插值两种方法对GPS卫星轨道进行了插值,比较了两种方法的特性及插值精度,结果表明两种方法虽然简单易实现,但当进行高阶插值时,边缘插值区间的精度较低.为解决该问题提出利用高次插值与低次插值相结合的方法进行轨道插值,算例证明,该插值方法可以改善插值精度.
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