radar altimeter

radar altimeter
An altimeter that uses radar to find the exact height of the aircraft above the surface. There are basically two types of radar altimeters—those employing pulse radar and others that are frequency-modulated continuous wave radar. The time interval between the transmitted and the received signals is measured in terms of feet or meters above the surface.

Aviation dictionary. 2014.

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  • radar altitude control mode — In an automatic flight control system, a control mode in which the height of an aircraft is maintained by referencing signals from a radar altimeter …   Aviation dictionary

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