中文摘要：

通过对GPS卫星轨道运动特征的研究，提出了一种顾及轨道凹凸性的标准化方法。该方法在拟合区间划分、最佳拟合阶数确定和拟合系数求解三方面进行了改进。将现有Chebyshev拟合方法与该方法进行了实例比较，研究结果表明，所提出方法在数据处理效率与精度方面均优于前者。

英文摘要：

Through analyzing and investigating the concave-convex features of dynamic GPS orbits, the improved standardization method based on Chebyshev polynomial fitting is presented. The novel method effectively improves fitting interval division, optimal order determination and weighted fitting coefficients calculation. Finally, a case is studied from precise orbits of 32 GPS satellites using existing methods and the novel method respectively and results show that the presented method is superior to the traditional methods in efficiency and accuracy.