... 衰减效应 attenuation effect 衰减信号 deamplification signal 衰减因数 attenuation factor; damping factor ...
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Due to satellite communication's long channel, far distance transmission and its wave through troposphere and ionosphere often brings the signal deamplification, noise and wrong code.
由于卫星通信信道长，传输距离远，电波要穿过对流层和电离层，易使信号衰减，引入噪声，造成误码。
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