资源三号02星双频GPS快速精密定轨

摘要

采用资源三号02星双频GPS观测数据和CODE快速星历,利用非差简化动力学方法实现卫星精密定轨.通过卫星轨道重叠弧段检验,轨道径向精度优于3.90 cm,位置精度优于5.52 cm.利用SLR观测数据检核卫星轨道,精度优于4 cm.采用轨道外推和瞬时根数方法预报轨道,12 h内切向精度优于30 m.%ZY3-02's precise orbit is determined from its satellite-borne GPS data and rapid emphasis of CODE with the zero-difference reduced-dynamic method.Overlap arcs are used to valuate satellite's orbit,the radial orbit of the accuracy is 3.90 cm and the position accuracy is around 5.52 cm.Compared with SLR data,the study shows that the accuracy approaches to 4 cm.Using an extrapolation method and osculating Kepler element to predict satellite orbit,the result shows that the radial accuracy can reach to 30 m in 12 hours.