vertical fading

例句：

1. 1. The signal strength is decreasing due to the increasing distance between the transmitter and receiver.
   由于发射器和接收器之间的距离增加，信号强度正在下降。
2. 2. The radio wave will experience vertical fading as it travels through the atmosphere.
   无线电波在穿过大气层时将经历垂直衰减。
3. 3. The satellite communication system suffers from vertical fading due to the high altitude of its orbit.
   由于卫星轨道的高海拔，卫星通信系统遭受了垂直衰减。