Wind farm turbines create a Doppler effect as they rotate, creating a potential radar blackout zone.

风力涡轮机在旋转过程中产生多普勒效应，形成一个潜在的雷达中断区。

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As an example, the operation frequency of TT&C and data transmission(TTC&DT) and the attenuation constant of electromagnetic wave through the blackout zone are estimated.

作为一次练习，估算了测控通信系统的工作频率、电波穿过“黑障”区的衰减常数；

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Here, we finally encountered the blackout zone.

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