低轨卫星通信网络星间链路几何参数动态特性

Dynamic characters of inter-satellite links in LEO networks

为了建立稳定的LEO网络星间链路 ,在星间链路及星载设备设计过程中必须考虑由于LEO网络中卫星处于不断运动中 ,在卫星处于不同位置时 ,星间链路几何参数随时间变化率等动态指标的变化规律 ,包括星间链路距离时间变化率 ,链路指向方位角时间变化率 ,链路指向仰角的时间变化率 .这些参数对分析星间链路的整体性能和星间链路设备设计是很重要 ,因此 ,详细阐述了星间链路几何参数的动态特性变化规律 。

In order to establish an efficient inter-satellite link (ISL) in the LEO network, it is necessary to take into consideration during the design of the ISLs and the devices on the LEO satellite the variation of geometric parameters of ISLs with time due to the continuous movement of the satellite in the LEO network, including the variation of ISLs length, azimuth and elevation with time, which are very important for the analysis of the overall performance of ISLs and the design of ISL devices. The variation of dynamic characteristics of ISLs is detailed, and their effect on the design of satellite antennas tracking systems and satellite transmitter's power adjusting systems is also presented.