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  2. VHF omnidirectional range - Wikipedia

    en.wikipedia.org/wiki/VHF_omnidirectional_range

    DVOR (Doppler VOR) ground station, collocated with DME. On-board VOR display with CDI MCT DVOR, Manchester Airport, United Kingdom.. Very High Frequency Omnidirectional Range Station (VOR) [1] is a type of short-range VHF radio navigation system for aircraft, enabling aircraft with a VOR receiver to determine the azimuth (also radial), referenced to magnetic north, between the aircraft to/from ...

  3. VOR/DME - Wikipedia

    en.wikipedia.org/wiki/VOR/DME

    In radio navigation, a VOR/DME is a radio beacon that combines a VHF omnidirectional range (VOR) with a distance-measuring equipment (DME). [1] The VOR allows the receiver to measure its bearing to or from the beacon, while the DME provides the slant distance between the receiver and the station.

  4. Radio navigation - Wikipedia

    en.wikipedia.org/wiki/Radio_navigation

    VHF omnidirectional range, or VOR, is an implementation of the reverse-RDF system, but one that is more accurate and able to be completely automated. [ citation needed ] The VOR station transmits two audio signals on a VHF carrier – one is Morse code at 1020 Hz to identify the station, the other is a continuous 9960 Hz audio modulated at 30 ...

  5. Direction finding - Wikipedia

    en.wikipedia.org/wiki/Direction_finding

    This is because the signal strength at the DF receiver, due to a radar transmission, is proportional to 1/R 2 whereas that at the radar receiver from the reflected return is proportional to σ/R 4, where R is the range and σ is the radar cross-section of the DF system. [36]

  6. Low-frequency radio range - Wikipedia

    en.wikipedia.org/wiki/Low-frequency_radio_range

    Low-frequency radio range audio signals: N stream, A stream and combined uniform tone (simulated sounds) The low-frequency radio range, also known as the four-course radio range, LF/MF four-course radio range, A-N radio range, Adcock radio range, or commonly "the range", was the main navigation system used by aircraft for instrument flying in the 1930s and 1940s, until the advent of the VHF ...

  7. Transponder landing system - Wikipedia

    en.wikipedia.org/wiki/Transponder_Landing_System

    The entire system can be transported in a standard 20' Conex container which can also be used as the center of operations, or on a single 463L master pallet. The system can be transported by truck, ship, or any suitable transport aircraft such as a C-130 or C-17, and can also be airlifted by helicopter. The transportable systems can be unpacked ...

  8. Doppler radio direction finding - Wikipedia

    en.wikipedia.org/wiki/Doppler_radio_direction...

    The Bellini-Tosi system still has moving parts, albeit small ones, but has the more major limitation that it requires the operator to hunt for the signal, which may take several minutes. HF/DF provides a direct and immediate indication of the signal direction, but only at the cost of requiring an oscilloscope or similar display system with an ...

  9. Very high frequency - Wikipedia

    en.wikipedia.org/wiki/Very_high_frequency

    Very high frequency (VHF) is the ITU designation [1] for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra high frequency ...

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