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  2. Flightradar24 - Wikipedia

    en.wikipedia.org/wiki/Flightradar24

    Flightradar24 ADS-B receiver based on jetvision Radarcape [22]. Flightradar24 aggregates data from six sources: [23] Automatic dependent surveillance – broadcast (ADS-B). The principal source is a large number of ground-based ADS-B receivers, which collect data from any aircraft in their local area that are equipped with an ADS-B transponder and feed this data to the internet in real time.

  3. Boeing E-3 Sentry - Wikipedia

    en.wikipedia.org/wiki/Boeing_E-3_Sentry

    Number built. 68. Developed from. Boeing 707. The Boeing E-3 Sentry is an American airborne early warning and control (AEW&C) aircraft developed by Boeing. E-3s are commonly known as AWACS (Airborne Warning and Control System). Derived from the Boeing 707 airliner, it provides all-weather surveillance, command, control, and communications, and ...

  4. Radar warning of Pearl Harbor attack - Wikipedia

    en.wikipedia.org/wiki/Radar_warning_of_Pearl...

    On the morning of 7 December 1941 the SCR-270 radar at the Opana Radar Site on northern Oahu detected a large number of aircraft approaching from the north. This information was conveyed to Fort Shafter ’s Intercept Center. The report was dismissed by Lieutenant Kermit Tyler who assumed that it was a scheduled flight of aircraft from the ...

  5. Lockheed EC-121 Warning Star - Wikipedia

    en.wikipedia.org/wiki/Lockheed_EC-121_Warning_Star

    Second PO-1W prototype at NAS Barbers Point 1952. Third production WV-2 in flight 1954. The Lockheed EC-121 Warning Star is an American airborne early warning and control radar surveillance aircraft operational in the 1950s in both the United States Navy (USN) and United States Air Force (USAF). The military version of the Lockheed L-1049 Super ...

  6. Boeing E-7 Wedgetail - Wikipedia

    en.wikipedia.org/wiki/Boeing_E-7_Wedgetail

    The Boeing E-7 Wedgetail, also marketed as the Boeing 737 AEW&C, is a twin-engine airborne early warning and control aircraft based on the Boeing 737 Next Generation design. It has a fixed, active electronically scanned array radar antenna instead of a rotating one as with the 707-based Boeing E-3 Sentry. [2][3] The E-7 was designed for the ...

  7. Identification friend or foe - Wikipedia

    en.wikipedia.org/wiki/Identification_friend_or_foe

    Identification, friend or foe (IFF) is a combat identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. IFF systems usually use radar frequencies, but other electromagnetic frequencies, radio or infrared, may be used. [1]

  8. Grumman E-2 Hawkeye - Wikipedia

    en.wikipedia.org/wiki/Grumman_E-2_Hawkeye

    The Northrop Grumman E-2 Hawkeye is an American all-weather, carrier-capable tactical airborne early warning (AEW) aircraft. This twin-turboprop aircraft was designed and developed during the late 1950s and early 1960s by the Grumman Aircraft Company for the United States Navy as a replacement for the earlier, piston-engined E-1 Tracer, which was rapidly becoming obsolete.

  9. Radar - Wikipedia

    en.wikipedia.org/wiki/Radar

    Radar is a system that uses radio waves to determine the distance (ranging), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method [1] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.