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汉语拼音：tiān bō

通常指射向空中经电离层反射或散射而返回地面的无线电波。由于电离层经常变化，天波传播情况不很稳定，但传播距离可以很远。天波传播是目前短波无线电通信和广播所采用的主要传播方式。

• The next day, to everyone's surprise, Mr. Potts turned up with his hat in its normal position.

  使没个人吃惊的是，第二天波茨先生戴着帽子出现了，帽子在以往相同的位置上。

• A simulation of sky-wave interference suppression in HF ground wave radar system is realized to explain its application in reality.

  还利用该方法对高频地波雷达中天波干扰的极化抑制进行了仿真，证明了算法的有效性。

• The Skywave Over-the-Horizon Radar (OTHR), working in the HF band, has strong exterior noise.

  工作在高频波段的天波超视距雷达（OTHR），其外部噪声非常强；

• So the direction of arrival (DOA) estimation is very important in the OTHR.

  因此信号波达方向（DOA）估计方法在天波超视距雷达中起到至关重要的作用。

• The interference has bad effect on the range and the Doppler information of target that may lead to the OTHR not working normally.

  流星余迹干扰会对天波超视距雷达探测目标的距离和多普勒信息造成负面影响，严重时会影响到天波超视距雷达的正常工作。

• The Ship Detection of Sky Wave over-the-Horizon Radar with Short Coherent Integration Time

  短相干积累条件下天波超视距雷达的舰船检测

• Sky-wave Reconnaissance Efficiency Evaluation of a Ship-board Short-wave Reconnaissance System

  舰载短波侦察系统对天波的侦察效能评估

• Study of interference nulling using horizontal dipole antennas

  用水平天线消除天波干扰的算法研究

• Application of Optical Cable Communication in Sky-wave Over-the-horizontal Radar

  光纤通信在天波超视距雷达中的应用