"They can also become invisible. They can go in and out of MOD radar. They can change speed, direction and height in seconds.
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In this paper, the polar coordinate error equations on side, direction and height in the circular control worknet are derived making good use of the circular character of circular worknet.
针对环形控制网的网形特点，推导了各类观测量：测边、测方向和测高的极坐标误差方程式。
It is, however, fitted with a camera and is able to use information from that camera to adjust its height and direction.
但是它可以利用身载摄像机收集到的信息对自身的飞行高度和方向进行调整。
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