海洋二号（HY-2）卫星双频全球定位跟踪系统（GPS）接收机获取的GPS数据是基于非差简化动力学方法应用于HY-2 卫星精密轨道确定。差分GPS载波相位数据可以消除钟差，同时利用GPS数据获得HY-2卫星轨道和GPS卫星轨道。GPS数据确定的轨道利用激光测距进行了检核，并与法国太空总署确定的轨道以及综合定轨策略确定的轨道进行了比较，HY-2 卫星基于GPS数据精密轨道径向成分优于3 cm。

The GPS data acquired by the HY-2A satellite GPS receiver have been used in a dynamic orbit determination, which was based on the description of the gravitational and nongravitational forces in the equations of motion. The GPS carrier data were processed in a difference mode to remove clock errors. Simultaneous estimation of the HY-2 satellite orbit and GPS orbit was performed using the data in March (2012). The resulting HY-2 satellite orbits have been compared with CNES orbits and reduced dynamic orbits for GPS/DORIS/SLR strategies, and in the meantime confirmed with SLR validation. The radical component of the GPS orbit was found to agree with better than 3 cm.