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- VHF_omnidirectional_range abstract "VHF Omni Directional Radio Range (VOR) is a type of short-range radio navigation system for aircraft, enabling aircraft with a receiving unit to determine their position and stay on course by receiving radio signals transmitted by a network of fixed ground radio beacons. It uses frequencies in the very high frequency (VHF) band from 108 to 117.95 MHz. Developed in the US beginning in 1937 and deployed by 1946, VOR is the standard air navigational system in the world, used by both commercial and general aviation. By 2000 there were about 3000 VOR stations around the world including 1033 in the US, reduced to 967 by 2013 with more stations being decommissioned with the widespread adoption of GPS. A VOR ground station sends out an omnidirectional master signal, and a highly directional second signal is propagated by a phased antenna array and rotates clockwise in space 30 times a second. This signal is timed so that its phase (compared to the master) varies as the secondary signal rotates, and this phase difference is the same as the angular direction of the 'spining' signal, (so that when the signal is being sent 90 degrees clockwise from north, the signal is 90 degrees out of phase with the master). By comparing the phase of the secondary signal with the master, the angle (bearing) to the aircraft from the station can be determined. This bearing is then displayed in the cockpit of the aircraft, and can be used to take a fix as in earlier radio direction finding (RDF) systems. This line of position is called the "radial" from the VOR. The intersection of two radials from different VOR stations on a chart gives the position of the aircraft. VOR stations are fairly short range: the signals are useful for up to 200 miles.VOR stations broadcast a VHF radio composite signal including the navigation signal, station's identifier and voice, if so equipped. The navigation signal allows the airborne receiving equipment to determine a bearing from the station to the aircraft (direction from the VOR station in relation to Magnetic North). The station's identifier is typically a two- or three-letter string in Morse code. The voice signal, if used, is usually the station name, in-flight recorded advisories, or live flight service broadcasts. At some locations, this voice signal is a continuous recorded broadcast of Hazardous Inflight Weather Advisory Service or HIWAS.".
- VHF_omnidirectional_range thumbnail D-VOR_PEK.JPG?width=300.
- VHF_omnidirectional_range wikiPageExternalLink navaids.
- VHF_omnidirectional_range wikiPageExternalLink aim0101.html.
- VHF_omnidirectional_range wikiPageExternalLink Learning_VOR_Sim.aspx.
- VHF_omnidirectional_range wikiPageExternalLink vor-simulator.html.
- VHF_omnidirectional_range wikiPageExternalLink navaids.
- VHF_omnidirectional_range wikiPageExternalLink nav.
- VHF_omnidirectional_range wikiPageID "351899".
- VHF_omnidirectional_range wikiPageRevisionID "605605444".
- VHF_omnidirectional_range hasPhotoCollection VHF_omnidirectional_range.
- VHF_omnidirectional_range subject Category:Aeronautical_navigation_systems.
- VHF_omnidirectional_range subject Category:Aircraft_instruments.
- VHF_omnidirectional_range subject Category:Avionics.
- VHF_omnidirectional_range subject Category:Radio_navigation.
- VHF_omnidirectional_range type AeronauticalNavigationSystems.
- VHF_omnidirectional_range type AircraftInstruments.
- VHF_omnidirectional_range type Artifact100021939.
- VHF_omnidirectional_range type Device103183080.
- VHF_omnidirectional_range type Instrument103574816.
- VHF_omnidirectional_range type Instrumentality103575240.
- VHF_omnidirectional_range type Object100002684.
- VHF_omnidirectional_range type PhysicalEntity100001930.
- VHF_omnidirectional_range type System104377057.
- VHF_omnidirectional_range type Whole100003553.
- VHF_omnidirectional_range comment "VHF Omni Directional Radio Range (VOR) is a type of short-range radio navigation system for aircraft, enabling aircraft with a receiving unit to determine their position and stay on course by receiving radio signals transmitted by a network of fixed ground radio beacons. It uses frequencies in the very high frequency (VHF) band from 108 to 117.95 MHz.".
- VHF_omnidirectional_range label "Drehfunkfeuer".
- VHF_omnidirectional_range label "Radiofaro omnidireccional VHF".
- VHF_omnidirectional_range label "VHF Omnidirectional Range".
- VHF_omnidirectional_range label "VHF Omnidirectional Range".
- VHF_omnidirectional_range label "VHF omnidirectional range station".
- VHF_omnidirectional_range label "VHF omnidirectional range".
- VHF_omnidirectional_range label "VOR".
- VHF_omnidirectional_range label "VOR".
- VHF_omnidirectional_range label "Всенаправленный азимутальный радиомаяк".
- VHF_omnidirectional_range label "甚高频全向信标".
- VHF_omnidirectional_range label "超短波全方向式無線標識".
- VHF_omnidirectional_range sameAs VOR_(radiomaják).
- VHF_omnidirectional_range sameAs Drehfunkfeuer.
- VHF_omnidirectional_range sameAs VOR.
- VHF_omnidirectional_range sameAs Radiofaro_omnidireccional_VHF.
- VHF_omnidirectional_range sameAs VHF_Omnidirectional_Range.
- VHF_omnidirectional_range sameAs VHF_Omnidirectional_Range.
- VHF_omnidirectional_range sameAs 超短波全方向式無線標識.
- VHF_omnidirectional_range sameAs 초단파_전방향_무선표지.
- VHF_omnidirectional_range sameAs VHF_omnidirectional_range_station.
- VHF_omnidirectional_range sameAs VOR.
- VHF_omnidirectional_range sameAs VOR.
- VHF_omnidirectional_range sameAs m.01zd2h.
- VHF_omnidirectional_range sameAs Q820036.
- VHF_omnidirectional_range sameAs Q820036.
- VHF_omnidirectional_range sameAs VHF_omnidirectional_range.
- VHF_omnidirectional_range wasDerivedFrom VHF_omnidirectional_range?oldid=605605444.
- VHF_omnidirectional_range depiction D-VOR_PEK.JPG.
- VHF_omnidirectional_range isPrimaryTopicOf VHF_omnidirectional_range.
