radio direction finder

radio direction finder
a navigational aid establishing a fix by means of the bearings of two known radio stations. Abbr.: RDF
[1920-25]

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also called  Radio Compass,  

      radio receiver and directional antenna system used to determine the direction of the source of a signal. It most often refers to a device used to check the position of a ship or aircraft, although it may also direct a craft's course or be used for military or investigative purposes.

      The antenna, usually a loop antenna, rotates and pinpoints the direction from which a radio signal is strongest. This is the direction of the broadcasting station, the position of which is already known. Using the directions and positions of several radio stations, a navigator can use triangulation to determine the position of his craft. Corrections must, however, be made in the readings from the radio direction finder to account, for example, for the effect on radio transmissions of the craft's magnetic field.

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Universalium. 2010.

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Look at other dictionaries:

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  • Radio direction finder — Civil Air Patrol members practice using a handheld radio direction finder to locate an emergency locator transmitter …   Wikipedia

  • Radio direction finder — Ein Radiokompass, auch ADF (engl. automatic direction finder ), RDF (engl. radio direction finder), oder Funkkompass ist eine bordseitige Empfangsanlage zur Funknavigation mittels Funkpeilung zu einem NDB (dtsch. ungerichtetes Funkfeuer ) oder zu …   Deutsch Wikipedia

  • radio direction finder — noun : direction finder * * * a navigational aid establishing a fix by means of the bearings of two known radio stations. Abbr.: RDF [1920 25] * * * radio direction finder, = radiocompass. (Cf. ↑radiocompass) …   Useful english dictionary

  • radio direction finder — radiopelengatorius statusas T sritis fizika atitikmenys: angl. radio direction finder vok. Funkpeiler, m; Funkpeilgerät, n rus. радиопеленгатор, m pranc. radiogoniomètre, m …   Fizikos terminų žodynas

  • radio direction-finder — /reɪdioʊ dəˈrɛkʃən faɪndə/ (say raydeeoh duh rekshuhn fuynduh) noun See direction finder …  

  • direction finder — direction finding. Radio. a receiver with a loop antenna rotating on a vertical axis, used to ascertain the direction of incoming radio waves. [1910 15] * * * ▪ instrument or  radio direction finder        radio receiver and antenna system for… …   Universalium

  • direction finder — Synonyms and related words: Bourdon tube, Gyropilot, Gyrosin compass, HFDF, Mach meter, RDF, absolute altimeter, accelerometer, aerial reconnaissance camera, aerometer, aeroscope, air log, altigraph, altimeter, ammeter, anemograph, anemometer,… …   Moby Thesaurus

  • direction finder — n. a device for finding out the direction from which radio waves or signals are coming, as a loop antenna that can be rotated freely on a vertical axis …   English World dictionary

  • Automatic Direction Finder — Ein Radiokompass, auch ADF (engl. automatic direction finder ), RDF (engl. radio direction finder), oder Funkkompass ist eine bordseitige Empfangsanlage zur Funknavigation mittels Funkpeilung zu einem NDB (dtsch. ungerichtetes Funkfeuer ) oder zu …   Deutsch Wikipedia

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