Simulation of Centimeter-Level Precise Orbit Determination for HY-2 Satellite Using DORIS and SLR

In order to achieve the centimeter-level precise orbit determination for the HY-2 satellite,the methods of orbit determination based on DORIS and SLR are discussed.We have simulated DORIS and SLR observation data for the HY-2 satellite,defined the methods and processes of precise orbit determination.In addition we have discussed the orbit determination accuracy using simulated data given different observation errors,and analyzed the impact of different distribution of ground beacons on orbit determination accuracy and consuming time.In order to obtain more accuracy results,we also analyzed the effect of two observation technique weights on orbit determination accuracy.Experiment results indicate that the optimization of beacon stations can significantly improve the orbit determination precision and save consuming time.Reasonable weights on a variety of technology measurements can make the accuracy of result to achieve the best during the integrated technology orbit determination,if we give DORIS and SLR observations 0.3 mm/s and 10 mm weights respectively,and the obit determination accuracy can achieve centimeter level.