基于双星定位系统的两类联合定轨模型及其等价性分析

Two Kinds of Combined Orbit Determination Models and Analysis of Equality Based on Bi-satellite Positioning System

对于基于双星定位系统的近地卫星精密定轨而言,定位星的轨道误差成为制约近地卫星定轨精度的瓶颈,一般采取定位星与用户星联合定轨策略来改善用户星的定轨精度。为此讨论了仅仅利用星间相对测量信息的自主定轨的亏秩问题,然后从测量几何关系的距离和测距数据2个不同角度建立了基于双星定位系统的近地卫星联合定轨模型,并对两类模型的等价性进行了分析和证明。

For LEO ＇ s precision orbit determination based on Bi-satellite Positioning System （ BPS）, trajectory error of positioning satellite is bottle-neck which improves precision of LEO, so we can take combined orbit determination strategy of positioning satellites and user satellites to ameliorate precision. This paper firstly discusses satellite autonomous orbit determination deficient-rank which is only based on satellite-to-satellite relative measurement information, then it constructs two kinds of combined orbit determination models from the angle of measure geometry relation and range-sum data. Finally this paper analyzes and proves the equality of this two kinds of models.