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radar
- Sinônimos - Inglês
- radio detecting and ranging
- Definição1
- An electronic device which, by measuring the time interval between transmission and reception of radio pulses and correlating the angular orientation of the radiated antenna beam or beams in azimuth and/or elevation, provides information on range, azimuth, and/or elevation of objects in the path of the transmitted pulses. Radar, an acronym for Radio Detecting And Ranging, was developed as a military system during World War II. A pulse of high-frequency electrical energy is transmitted from a highly directional antenna. The pulse travels until it strikes an object, then bounces back and is received by the antenna. The return pulse causes a bright spot to appear on the screen of a cathode-ray tube. Radar is used for detecting precipitation, for navigation, and for detecting obstructions to flight. Simplified radar is used for measuring the speed of vehicles on our highways.
- Fonte1
- CRANE, Dale (ed.). Dictionary of aeronautical terms. 2nd ed. Renton: ASA, 1991.
- Fonte2
- INTERNATIONAL MARITIME ORGANIZATION; INTERNATIONAL CIVIL AVIATION ORGANIZATION. IAMSAR manual: international aeronautical and maritime search and rescue manual. Volume III: mobile facilities. Montréal, 2005. (Doc. 9731)
- Fonte3
- ARAÚJO, João Richard Barcelos. Inglês técnico: técnicos em manutenção de aeronaves. [S.l]: [s.n.], [200-]. 100 p.
- Contexto
- The signal appears on the interrogating radar screen and gives the bearing and distance of the transponder from the interrogating radar for search and rescue purposes.
- Subárea
- Aeronautical Telecommunications
- Related Term
- radar display
- radar surveillance
- Narrower Term
- precision-approach radar
- primary radar
- primary surveillance radar
- secondary radar
- secondary surveillance radar
- Français
- radar
- Imagem
Long distance detection radar.
Fonte: http://commons.wikimedia.org/wiki/File:Radar_antenna.jpg?uselang=es
