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针对低地球轨道(LEO)卫星对全球卫星定位系统(GPS)卫星的掩星观测任务,在考虑LEO和GPS卫星几何关系及掩星观测天线视场的条件下,建立轨道模拟系统,对全球和区域内的掩星事件进行了模拟。对单颗卫星,用分离变量法讨论了卫星轨道参数对掩星事件数量和时空分辨率的影响,比较了大气层与电离层掩星事件的差别,并根据分析结果用混合蚁群算法优化了单颗卫星的轨道参数。对LEO卫星星座,用混合蚁群算法优化了星座的轨道和构型参数。给出了可供参考的较优单颗LEO卫星的轨道参数和星座构型参数。
In view of the low-earth orbit (LEO) satellite’s occultation observation mission of the global satellite positioning system (GPS) satellite, the orbital simulation system is established considering the geometrical relationship between LEO and GPS satellites and the occultation observation antenna field of view. Occultation events in the area were simulated. For a single satellite, the influence of satellite orbit parameters on the number of occultation events and temporal-spatial resolution is discussed by using the method of separation variables. The differences between the atmospheric and ionospheric occultation events are compared. Based on the analysis results, the hybrid ant colony algorithm Satellite orbit parameters. For LEO satellite constellations, the orbit and configuration parameters of the constellation are optimized using a hybrid ant colony algorithm. The orbital parameters and constellation configuration parameters of the preferred single LEO satellite are given.