Planes must zigzag from one ground beacon to the next, and ascend and descend in steps at each stage obtaining permission from the ground.
飞机从一个地面信标到下一个信标曲折飞行，在每一阶段都要经过地面的许可才能上升和下降。
It can be used in developing the short range radio navigation ground beacon and testing the performance of its transmitter.
该平台可在近程无线电导航地面导航设备的研制中确定发射机参数和检验性能时使用。
Instead of flying straight, planes must zigzag from one ground beacon to the next, and ascend and descend in steps, at each stage obtaining permission from the ground.
客机必须曲折地从一个信号站飞到下一个，而不是直线飞行；每一步上升或下降都需要得到地面的许可。
But he can use a robot too: a football-sized drone, hovering several metres off the ground, follows a beacon stashed in the little boy's school bag.
但他也可以选择使用机器人：在小男孩的书包里放入一个信标台，足球大小的无人飞机会盘旋在距地面几米高的地方，一直跟着信号。
The laser signal combined with a closed - loop control system can be used in automatic level flatting of the ground. It is a dynamic application of laser beacon.
自准水平激光仪的激光信号与闭环控制系统的结合，实现地面的水平平整，它是自准水平激光仪的一种动态应用。
Three satellites cluster for time-difference localization is applied to find the radar beacon position on the ground.
三星时差定位星座是用于地面雷达辐射源定位的星座。
Three satellites cluster for time-difference localization is applied to find the radar beacon position on the ground.
三星时差定位星座是用于地面雷达辐射源定位的星座。
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