Strong radarechoes and positive-negative velocity and head wind area are indicative to the heavy rainfall event.
强雷达回波和正负速度对、逆风区等特征对强降水具有指示意义。
2
When winds are blowing hard, the radarechoes are fainter, giving a measure of how strong the wind is blowing over the oceans.
当风吹得越来越强时，雷达回波会变弱。这可以用来测量越过海洋的风强度。
3
The ionosphere contamination imposing on the High-frequency(HF) radarechoes has to be suppressed since it severely degrades the detection performance of HF radar.