极轨气象卫星数传链路雨衰影响

极轨气象卫星通信系统受自身特点的限制和环境影响,存在各种不可避免的干扰,其中,降雨衰减对卫星链路传输的影响尤为重要。在对我国极轨气象卫星数传链路预算原理充分分析的基础上,按照ITU-R建议,构建了相应的雨衰模型,通过对国内各个地面接收站降雨衰减情况的MATLAB仿真,逐一讨论了降雨强度、天线仰角、频率、极化倾角等影响降雨衰减特性的相关因素,得出了一些有益结论,为极轨气象卫星数传链路和地面接收系统的设计提供有益参考。

Influence of Rainfall Attenuation on Communication Link of Polar Orbit Meteorological Satellite Data Transmission

There are some inevitable interferences in the polar orbit meteorological satellites link budget, among which rainfall attenuation plays a vital role. On the basis of communication link design theory, a rainfall attenuation simulation model is presented. Through MATLAB simulation for national polar orbit meteorological satellite receiving ground stations, the factors influencing rainfall attenuation are discussed, such as rainfall intensity, antenna elevation, frequency, and polarization angle. The results can be used as references in solving the problems about the communication link and the design of ground data receiving system.