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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]
IFF Mark X was the NATO standard military identification friend or foe transponder system from the early 1950s until it was slowly replaced by the IFF Mark XII in the 1970s. It was also adopted by ICAO, with some modifications, as the civilian air traffic control (ATC) secondary radar (SSR) transponder. The X in the name does not mean "tenth ...
The aviation transponder interrogation modes are the standard formats of pulsed sequences from an interrogating Secondary Surveillance Radar (SSR) or similar Automatic Dependent Surveillance-Broadcast (ADS-B) system. The reply format is usually referred to as a "code" from a transponder, which is used to determine detailed information from a ...
Mode 3/A is used to identify each aircraft in the radar's coverage area. Mode C is used to request/report an aircraft's altitude. Two other modes, mode 4 and mode S, are not considered part of the ATCRBS system, but they use the same transmit and receive hardware. Mode 4 is used by military aircraft for the Identification Friend or Foe (IFF ...
Sounds of Silence is the second studio album by the American folk rock duo Simon & Garfunkel, released on January 17, 1966. The album's title is a slight modification of the title of the duo's first major hit, "The Sound of Silence", which originally was released as "The Sounds of Silence". [ 2] The song had earlier been released in an acoustic ...
Gillham code is a zero-padded 12-bit binary code using a parallel nine- [ 1] to eleven-wire interface, [ 2] the Gillham interface, that is used to transmit uncorrected barometric altitude between an encoding altimeter or analog air data computer and a digital transponder. It is a modified form of a Gray code and is sometimes referred to simply ...
IFF has only one mode (Mode 4). There is a new Mode 5, but this isn't the IFF we are talking about here. Mode 5 is really a crypto Mode S and ADS-B. I would get rid of all the references to SIF (selective identification feature). OK, did that, hope it works for you. Note: IFF is Mode 4 and 5, there are no other operational modes.
Ultra is the ninth studio album by English electronic music band Depeche Mode, released on 14 April 1997 by Mute Records. It was the band's first album following the departure of Alan Wilder . Wilder's departure and lead singer Dave Gahan 's drug problems, which culminated in a near-fatal overdose, had caused speculation that Depeche Mode was ...