导航星座的任务重构技术研究

以COMPASS卫星导航星座为对象，研究了导航任务的重构技术。首先，对COMPASS卫星导航星座的主要性能进行了分析和仿真；其次，分析了星座中部分卫星失效后对导航性能的影响；最后，提出了分别利用在轨运行的高、中、低轨卫星及临近空间飞行器进行任务重构的方法，并对重构后的导航性能进行了仿真。仿真结果表明：提出的任务重构方法对于保证导航星座的正常运行是有效的。同时，对于研究飞行器应急测控技术具有借鉴意义。

Strategy of Mission Reconfiguration of Navigation Constellation

In order to study the problem of navigation mission reconfiguration, three kinds of mission reconfiguration methods are presented for the COMPASS navigation constellation in this paper. After analyzing and simulating the main performances of COMPASS navigation constellation, the effect on navigation performance is analyzed under the situation of satellite invalidation in the constellation. Finally, the mission reconfiguration methods using on|orbit satellites or near space pseudolite are proposed. By applying these methods, the reconfigured navigation performances are simulated. The simulation results show that mission reconfiguration methods are effective for guaranteeing the navigation constellation operating normally. At the same time, it is useful for studying operational responsive space tracking, telemetry and control (TT&C).