【摘要】 拉格朗日等插值算法是处理GNSS精密钟差数据的常用方法,但通过实际计算发现,在目前卫星原子钟性能和钟差产品精度越来越高的情况下,传统多项式插值法并未比简单线性插值法更好,在分析其原因后,提出了基于对插值样本进行线性评估的数据预处理方法,根据评估结果选择合适的插值模型,才能更好提高GNSS精密钟差数插值精度。更多还原

【Abstract】 Lagrange polynomials is the common method in GNSS precise clock error data processing,the actual comparison shows that Lagrange interpolation is not better than simple linear interpolation under the current conditions that new satellites atomic clock and IGS clock products are more and more accurately. Especially when the satellite clock linear change,Lagrange interpolation maybe amplify the error. Considering the simplicity,practicality and robustness,Lagrange interpolation is not recommended in GNSS precise clock error data processing as much as possible.更多还原