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FM radio altimeter
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FM radio altimeter
Encyclopedia
工学
无线电频率导航
释
FM radio altimeter
调频式无线电高度表
利用频率调制的无线电信号,通过测量发射信号和经地面反射信号间的差拍频率,获得飞行载体相对地面的垂直距离(即相对高度)的无线电频率测高设备。
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spherical Hankel function of the first kind
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