基于伪距和观测量的地球同步卫星动力学定轨研究

利用伪距和观测量对同步卫星进行了动力学定轨的研究，给出了伪距和观测量的测量方程和修正方法，采用国内4个监测站的模拟数据进行了仿真计算．结果表明，采用7天弧长伪距和数据进行轨道改进及轨道外推的精度，与5天弧长数据的计算结果相当，但远优于3天数据的计算结果．在观测随机误差为3m时，7天弧长数据定轨精度约为5m，预报7天径向精度优于20m．

RESEARCH ON DYNAMIC ORBIT DETERMINATION FOR GEOSTATIONARY SATELLITE USING TWO-WAY PSEUDORANGE

In this paper, a study on the dynamic orbit determination for geostationary statellite using two-way pseudorange observations are presented. The satellite observation equation and the method for correcting the observations in term of the two-way pseudorange are given. The simulating calculations are performed by using the observation data set of the four monitor stations in China. The results show that the precision of the orbit improvement and extrapolation using seven days two-way pseudorange observation data set are same as those of five days are, but much better than three days' data set under the condition of random error in 3 m. Using seven days observation, the precision of the orbit improvement is about 5 m and the radial precision of the orbit predication is about 20 m.