A radar beam picks out the moving target and stays with it all the time.

雷达波束能辨认出活动的目标，并一直跟踪该目标。

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When a target is locked there is a radar beam position indication on the HUD.

当目标被锁定时，在HUD上有雷达波束位置指示。

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A method of estimating the confidence interval for debris population using radar beam fence is described.

针对雷达波束篱笆空间碎片探测模式，提出了一种估计碎片数量置信区间的方法。

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Many Greyhound buses sweep the road ahead with a radar beam, which warns the driver if there is an obstacle in his path.

ECONOMIST: A safety bet

And in the image of Moscow-Sheremetyevo airport, the flat concrete surfaces of the runways appear as black lines because the radar beam has been very efficiently reflected away from the satellite.

BBC: German TanDEM-X satellite returns first images

The trailer-mounted radar is a "phased array" type - it scans the sky with a narrow beam which flicks between thousands of locations each second.

BBC: Fact file: Patriot missile defence