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国际GNSS组织(IGS)中心提供的GPS卫星精密星历的时间间隔为15 min,在GPS的实际应用中必须要对GPS轨道进行插值。常规的GPS轨道插值方法有Lagrange插值、Neville插值和Chebyshev拟合。对上述3种插值方法进行了详细分析,并用于GPS轨道插值;然后利用美国国家大地测量局(NGS)提供的GPS精密卫星星历进行计算。结果表明,当插值阶数为9阶时,插值精度最高,随着阶数进一步地增加,插值精度反而会下降。 更多还原

【Abstract】 International GNSS Service(IGS) provides the GPS orbits in 15 min;however,it is needed to be interpolated during GPS data processing.There are the conventional methods used for Standardization of GPS satellite orbits such as Lagrange Interpolation,Neville Interpolation,and Chebyshev Fitting.In this paper,the methods were used to interpolate the orbits provided by National Geodetic Survey.Results showed that the interpolating methods performs best with the 9 order,it performed worse with the orde... 更多还原