中继卫星与用户航天器之间星间链路的研究

Research on inter-satellites links between relay satellites and user spacecrafts

中继卫星在地球同步静止轨道上运行,既能直视中低轨道用户航天器,又能直视地面站,是沟通用户航天器与地面站的桥梁。如果考虑中继卫星星座,则中低轨道用户航天器基本上在中继卫星星座的覆盖范围内,因此只考虑单颗中继卫星与用户航天器之间的星间链路情形。中继卫星与中低轨道用户航天器之间的星间链路可以用中继卫星与用户航天器之间的时间窗口个数、平均时间窗口长度、最大和最小的时间窗口长度等参数描述。利用STK,采用模拟仿真的方法,分析了中继卫星与用户航天器之间的星间链路特性。

The relay satellites, circulating on the GEO （geographic earth orbit）, can view the user spacecrafts on the LEO （low earth orbit） and the MEO （middle earth orbit） directly, and view the ground stations directly. The relay satellites can be seen as the bridge between the user spacecrafts and the ground stations. As the user spacecrafts on the LEO and the MEO are covered within the TDRSS constellation, the inter-satellites links are researched between a single relay satellite and the user spacecrafts, The inter-satellites links can be described with the number of time windows, the mean length of time windows, the maximal and minimal lengths of time windows between the relay satellite and the user spacecrafts, etc. The characteristics of the inter-satellites links are simulated with STK,