Therefore, in order to ensure the transmission quality, reliability and economical efficiency, we must master the rainfall attenuation influence of earth station setting areas accurately while the designing the earth-space satellite communication links. 因此,在设计地&空卫星通信线路时,为了保证通信系统传输质量、提高可靠性及经济性,就必须要准确地掌握地面站设置区域的降雨衰减所产生的影响。