卫星测控分系统星地链路分析与建模

Analyzing and Modeling of the Satellite to the Earth Station of Satellite TTC Subsystem

分析了载波信号在卫星与地面站传输过程中产生的各种增益和空间环境所造成的各种损耗,建立了有关增益和损耗的估算模型.通过估算可以在载波频率、卫星天线、地面站天线等诸多设备参数之间进行权衡,将链路裕度控制在一个合理的范围,使之既能满足跟踪、遥控和遥测的要求,又不致造成过多的资源浪费.

Analyzing carrier wave transmitted between the satellite, the earth station and its gain brought by transmit antenna and receive antenna, and various losses brought by space environment, established models of gains and losses for estimating. Through estimation, we can make a balance between parameters such as frequency, transmit power, satellite antenna, the earth station antenna, we can control the link margin in a rational range, so it satisfies the requirement of TT&C(Tracking,Telemetry and Commanding)and wastes less resources.