一种导航星座星间链路拓扑设计方法  

An Toplogy Design Method of Navigation Satellite Constellation Inter-satellite Links

作　　者：李振东[1] 何善宝[1] 刘崇华[1] 王海红[1] 

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《航天器工程》2011年第3期32-37,共6页Spacecraft Engineering

摘　　要：利用星间测距和通信实现卫星自主导航是下一代导航星座的发展方向之一。为了确定星间测距和通信链路的网络拓扑结构,对walker24/3/2星座的卫星之间几何可见性、卫星天线之间的可见性进行了研究,给出了可见性判断条件,并针对三条轨道相互垂直的情况,推导了星间几何距离随时间变化的公式。对天线扫描区域为±60°对地圆锥的情况进行了理论分析和卫星仿真工具包(Satellite Tool Kit,STK)仿真,理论分析和仿真结果均表明:星座中任意一颗卫星相对于其相邻的两个轨道面,存在各有两颗可见时间达到100%的卫星时,可以建立轨道面间永久星间链路,在间歇可见的卫星之间可以建立动态星间链路。最后,根据可见性结果,针对导航星座设计了一种静态无需切换的网络拓扑结构和一种动态带切换的网络拓扑。It is a trend that inter-satellites links are used to achieve autonomous navigation of satellite constellation.To design crosslink topology,inter-satellite antenna visibility of walker24/3/2 satellite constellation is investigated and several conditions of visibility are analyzed.The relationship between inter-satellite range and time is deduced with three orbits upright each other.Theoretical analysis and satellite tool kit（STK） simulation are given when the antenna scan bound is a cone pointing to earth with ±60°angle.The results show that if two satellites can be seen in each adjacent orbit for every satellite in the whole orbit period,permanent inter-satellite links can be established.Finally,a static network topology and a dynamic network topology of navigation satellite network are put forward.

关 键 词：导航卫星星座 自主导航 星间链路 星座网络 设计 仿真 

分 类 号：V474.25[航空宇航科学与技术—飞行器设计]