Check anchor position by radar.

用雷达检查锚位。

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A spaceship's position can be located by following its radio signal, or by using telescopes and radar.

宇宙飞船的位置可以根据追踪它的无线电信号来确定，也可以用望远镜和雷达来确定。

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The red line shows the Lander's true position, the blue line the position measured by radar.

红线显示了登月舱的实际位置，蓝线显示了雷达度量的位置。

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The Patriot missile homes on an electronic signal "painted" on the target by the radar, and relays its position in relation to the target back to the radar and on to the control centre.

BBC: Fact file: Patriot missile defence