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Direction finding

Direction finding (DF), radio direction finding (RDF), or radiogoniometry is the use of radio waves to determine the direction to a radio source. The source may be a cooperating radio transmitter or may be an inadvertent source, a naturally occurring radio source, or an illicit or enemy system. Radio direction finding differs from radar in that only the…

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History

Equipment

Applications

Astronomy

Direction finding at microwave frequencies

DF by amplitude comparison

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Map overview Semantic statistics

Direction finding

Nodes180
Edges179
Triples140
Avg. degree1.99
Density0.011111
Components1

How this topic connects Entity context

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Direction finding

Top relations

related to Location of illegal, secret or hostile transmitters – SIGINT · 23
Direction finding → Adcock HF DF, By, DF, Europe, Even, General Post Office, German, HF Adcock, If, In, In World War II, Initially, Many, MI5, MI6, MI8, One, Radio Security Service, RSS, The
related to Huff-duff · 17
Direction finding → Adcock, Bellini-Tosi, British, By, Development, Germans, He, However, In, Met Office, RDF, Robert Watson-Watt, The Germans, To, U-boat, UK, When
related to Sport · 17
Direction finding → Aerial, Aircraft, Another, ARDF, Emergency, Events, Galeta Island, GT-302, Many, Maritime RDF, MHz, Pelengator, RDF, T-hunting, The, VORTAC, World War II
related to Radio navigation · 14
Direction finding → Appleyard, Beacons, Due, GPS, NDB, NDBs, Radio, Range, RDF, Similar, Since, Starting, Very, VOR
related to Operation · 12
Direction finding → AM, At, By, In, Later, LW, On, One, RDF, This, While, World War II
see also · 9
Direction finding → Amplitude, AN/FRD-10, Battle, BeamsElectric, DMEWullenweber, FLR-9, Phase, US Air Force HF, US Navy HF
related to Antennas for DF · 8
Direction finding → Although, Antennas, DF, Gaussian, However, In, Preferably, The
related to Equipment · 8
Direction finding → AM, An, DF, For, RDF, The, These, Using
related to 21st century · 6
Direction finding → DGPS, GMDSS, GPS, Loran, Modern, The
related to Emergency aid · 6
Direction finding → Avalanche, Emergency, GPS, Historically, Modern, Since

Important terminology Word statistics

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Important terminology

direction antenna radio signal used antennas systems df finding rdf bearing signals system two aircraft receiver use loop radar may

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
GPSinstance ofThe striking cross frame antenna with attached auxiliary antenna can only be found on the signal masts of some older ships because they do not interfere there and dismantling wo…0.80text
DGPSinstance ofThe striking cross frame antenna with attached auxiliary antenna can only be found on the signal masts of some older ships because they do not interfere there and dismantling wo…0.80text
radarinstance ofThe striking cross frame antenna with attached auxiliary antenna can only be found on the signal masts of some older ships because they do not interfere there and dismantling wo…0.80text
the now-outdated Loran C have radio direction finding methods that are imprecise for today's needs.Radio direction finding networks also no longer existinstance ofThe striking cross frame antenna with attached auxiliary antenna can only be found on the signal masts of some older ships because they do not interfere there and dismantling wo…0.80text
phased arrays are generally used for highly accurate direction finding systemsinstance ofwith the parabolic shape directing received signals from a very narrow angle into a small receiving element mounted at the focus of the parabola.Electronic analysis of two anten…0.80text
phased arrays are generally used for highly accurate direction finding systemsinstance ofElectronic analysis of two antennas' signalsMore sophisticated techniques0.80text
Direction findingrelated to 21st centuryThe0.60section
Direction findingrelated to 21st centuryGMDSS0.60section
Direction findingrelated to 21st centuryModern0.60section
Direction findingrelated to 21st centuryGPS0.60section
Direction findingrelated to 21st centuryDGPS0.60section
Direction findingrelated to 21st centuryLoran0.60section

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