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雨衰减对于10GHz以上无线电系统的影响是极为严重的。本文根据我国65个站点的分钟降雨率数据，利用ITU－R最新给出的雨衰减预报模式，计算出我国未来12GHz三个轨道位置（62°E，80°E，92°E）的广播通信卫星，分别在圆极化和线极化情况下的雨衰减值。
The impact of rain attenuation on radio systems above 10GHz is extremely serious. Based on the rainfall data of 65 stations in our country, this paper calculates the broadcast communications of 62 ° E, 80 ° E and 92 ° E in the future at 12 GHz in China using the rain attenuation prediction model newly given by ITU-R Satellites, rain attenuation values respectively in case of circular polarization and linear polarization.