radio altimeter


radio altimeter
Altimeters employing radio waves to measure the height of the aircraft above the surface. The frequency of the transmitted and received signal is the same but the transmitted frequency is continuously changed. The time difference between the transmitted and the received signals is converted into height and indicated in feet or meters on the indicator. Most radio altimeters do not indicate height when an aircraft is above a certain distance from the ground. Some errors are likely when an aircraft is banked.

Aviation dictionary. 2014.

Look at other dictionaries:

  • radio altimeter — noun : an altimeter utilizing the lag between the time of transmission of a radio wave from an airplane and the time of reception of the same wave after reflection from the ground * * * radio altimeter see under ↑altimeter • • • Main Entry:… …   Useful english dictionary

  • radio altimeter — radijo aukščiamatis statusas T sritis Standartizacija ir metrologija apibrėžtis Skrendančiame objekte (orlaivyje, raketoje, dirbtiniame palydove) įrengtas radionavigacinis įrenginys skridimo aukščiui matuoti. atitikmenys: angl. radio altimeter… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • radio altimeter — radijo aukščiamatis statusas T sritis fizika atitikmenys: angl. radio altimeter vok. radioelektrischer Höhenmesser, m; Radiohöhenmesser, m rus. радиоальтиметр, m; радиовысотомер, m pranc. altimètre radio électronique, m; radioaltimètre, m …   Fizikos terminų žodynas

  • radio altimeter — /ˌreɪdioʊ ˈæltəmitə/ (say .raydeeoh altuhmeetuh) noun an electronic altimeter which indicates the height of an aircraft by measuring the time taken for an emitted radio wave to travel to the ground and back again …   Australian English dictionary

  • low-range radio altimeter system — The system used to measure the height of the aircraft from the ground when on a low level approach. It measures the aircraft height from 0 to 2500 ft (8 km). The frequency of operation is 4300 MHz. It is essentially a radio altimeter …   Aviation dictionary

  • altimeter — /al tim i teuhr, al teuh mee teuhr/, n. 1. a sensitive aneroid barometer that is graduated and calibrated, used chiefly in aircraft for finding distance above sea level, terrain, or some other reference point by a comparison of air pressures. 2.… …   Universalium

  • Altimeter — An altimeter is an instrument used to measure the altitude of an object above a fixed level. The measurement of altitude is called altimetry, which is related to the term bathymetry, the measurement of depth underwater. Aircraft Instrumentation… …   Wikipedia

  • altimeter — An instrument to indicate the height of an aircraft above a predetermined datum, normally sea level. Specifically, an instrument similar to an aneroid barometer that utilizes the change of atmospheric pressure with altitude to indicate the… …   Aviation dictionary

  • altimeter — al•tim•e•ter [[t]ælˈtɪm ɪ tər, ˈæl təˌmi tər[/t]] n. aer. an aneroid or radio barometer used chiefly in aircraft to ascertain flight altitude • Etymology: 1820–30 …   From formal English to slang

  • altimeter — /ˈæltəmitə / (say altuhmeetuh) noun 1. a sensitive aneroid barometer calibrated and graduated to measure altitudes by the decrease of atmospheric pressure with height, used in aircraft for finding distance above sea level, terrain, or some other… …   Australian English dictionary


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