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中文摘要：
Jason-2卫星为测高卫星，需要cm级的轨道精度。利用Jason-2星载GPS数据，采用简化动力学法进行了Jason-2卫星精密定轨。对简化动力学轨道进行重叠轨道对比，径向精度达到1．19cm；与CLASS提供的POE结果对比，径向精度达到5．54cm；与SLR数据进行对比，整体精度达到6．63cm。因此，简化动力学轨道达到了cm级要求，定轨精度良好。
英文摘要：
The Jason-2 satellite is an altimeter satellite, which means orbit precision must reach cm level. Jason-2＇s precise orbit is determined from Jason-2~s satellite-borne GPS data using the zero- difference reduced-dynamic method, introduced for the processing of precise orbit determination, it analyzes the precision of orbit determination. An experiment for precise orbit determination is done with actual data to compare the overlap orbits from the reduced-dynamic method, the radial accuracy reaches 1.19 era, and result compares with POE provided by CLASS, and analyse the difference in RTN. The study shows that the radial accuracy reaches 5.54cm. Comparing with SLR data, the study shows that overall accuracy reaches 6.63cm. In general, the accuracy of the computed orbit is at centimeter level. ,and it reaches the required standard.
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