基于星间测量的异构星座自主导航方法研究

随着星座逐渐向多功能、大型化方向发展，异构星座成为研究的热点。为了解决卫星数目较多，地面设备进行定位和测控难度较大的问题，研究了基于星间测量的异构星座的自主导航方法，该方法充分利用星座中卫星的相对运动规律构成的约束条件，利用有条件的参数加权平差方法，解决星间测距网的基准秩亏问题，并针对异构星座中卫星的位置分布和初始精度的不同，进行分组观测，采用分组平差方法进行定位解算。仿真结果表明：该方法能够有效的降低定位解算的时间，并通过合理的约束，提高定位的精度。

Autonomous Navigation Method of Heterogeneous Constellation Using Inter-Satellite Measurement

With constellation developing towards multi - function and largeness, heterogeneous constellation became hot. In order to resolve the problem of too many satellites and the difficulty of position determination and measurement and control for ground equipment, an autonomous navigation method of heterogeneous constellation which was based on inter - satellite measurement was studied in this paper. Using the restrictions composed of relative movement rules of satellites in constellation and the estimation method with conditional parameters added weights, the problem of rank- short reference in net of inter-satellite measurement was resolved. And according to the difference in position distribution and initial prenision of satellites in constellation, the grouping estimation method was used to determine position. Simulation results showed that the method in this paper could reduce the time of position determination effectively and improve the precision of position determination with reasonable restrictions.