中文摘要：

分析了多种精密卫星钟差的插值方法，将插值结果与JPL等IGS分析中心结果相比较，最后将钟差插值结果进行低轨卫星定轨，并对不同插值方法得出的定轨精度进行分析。结果表明，利用GPS地面跟踪站的观测数据，估计GPS卫星钟差，估计精度可达0．1～0．3ns。将其应用于CHAMP卫星定轨，其定轨精度优于10cm。

英文摘要：

Several methods to interpolate precise satellite clock bias are introduced. Then, the results obtained by interpolation are compared with that from JPL and other IGS analysis center. Finally, the clock bias results after interpolation are used in the orbit determination for LEOs, and orbit determination accuracies obtained by different methods are analyzed. Using the GPS data of ground tracking stations to estimate satellite clock bias, the estimation accuracy is up to 0.1 - 0.3 ns. When the GPS satellite clock bias is applied to orbit determination for CHAMP, the accuracy of orbit determination is better than 10cm.