BDS卫星动力学参数最优解与定轨跟踪站最优分布

Optimal Estimation of Dynamic Parameters of BDS Orbit for Optimal Selection of Tracking Stations

基于动力学定轨原理与方法,给出动力学参数精度衰减因子(MDOP)的计算方法;以MDOP值为标准,分析BDS定轨中不同跟踪站的分布以及分布方案的优劣;最后,利用BDS单系统定轨进行验证。结果表明,MDOP值和定轨精度间的对应关系显著,可以作为优选定轨跟踪站分布方案的依据。

Based on the theory and method of dynamic orbit determination,the calculation method of MDOP value of dynamic parameters is given in this paper.Subsequently,the MDOP value of dynamic parameters is considered as the standard to analyze the contribution of different tracking station distribution schemes and different tracking station construction schemes for BDS orbit determination.Finally,the conclusion is verified by the BDS orbit determination.The results show that the correspondence relationship between the MDOP value of dynamic parameters and the precision of orbit determination is obvious.It can be considered the optimally selected basis of the tracking station distribution scheme.