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A transponder landing system (TLS) is an all-weather, precision landing system that uses existing airborne transponder and instrument landing system (ILS) equipment to create a precision approach at a location where an ILS would normally not be available.
Four octal digits can represent up to 4096 different codes, which is why such transponders are sometimes described as "4096 code transponders". [ 10 ] The use of the word "squawk" comes from the system's origin in the World War II identification friend or foe (IFF) system, which was code-named "Parrot".
Transponders are used on some military aircraft to ensure ground personnel can verify the functionality of a missile’s flight termination system prior to launch. Such radar-enhancing transponders are needed as the enclosed weapon bays on modern aircraft interfere with prelaunch, flight termination system verification performed by range safety ...
One such system, Transponder Landing System (TLS) precisely tracks aircraft using the mode 3/A transponder response received by antenna arrays located near the runway. These antennas are part of a measurement subsystem that is used to precisely determine the aircraft 3-dimensional position using TOA, DTOA and AOA measurement techniques.
A GBAS landing system; B LPV (APV with SBAS); C LORAN C; D DME; E1 FMC WPR ACARS; E2 D-FIS ACARS; E3 PDC ACARS; F ADF; G GNSS (If the letter G is used, the types of external GNSS augmentation, if any, are specified in Item 18 following the indicator NAV/ and separated by a space.)
Combined interrogator & transponder system: BAE Systems: AN/APX-118: Identification Friend or Foe (IFF) system: P-3 Orion: AN/APX-119: Identification Friend or Foe (IFF) system: F-15 Eagle, F-15E Strike Eagle, T-45 Goshawk: Raytheon: AN/APX-125: Combined interrogator & transponder system: BAE Systems: AN/APX-126: Combined interrogator ...
A marker beacon is a particular type of VHF radio beacon used in aviation, usually in conjunction with an instrument landing system (ILS), to give pilots a means to determine position along an established route to a destination such as a runway.
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