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  2. Automatic Dependent Surveillance–Broadcast - Wikipedia

    en.wikipedia.org/wiki/Automatic_Dependent...

    Conceptual of the ADS-B system, illustrating radio links between aircraft, ground station and satellite. Automatic Dependent Surveillance–Broadcast (ADS-B) is an aviation surveillance technology and form of electronic conspicuity in which an aircraft determines its position via satellite navigation or other sensors and periodically broadcasts its position and other related data, enabling it ...

  3. Aviation transponder interrogation modes - Wikipedia

    en.wikipedia.org/wiki/Aviation_transponder...

    This is the type of transponder that is used for TCAS or ACAS II (Airborne Collision Avoidance System) functions, and is required to implement the extended squitter broadcast, one means of participating in ADS-B systems. A TCAS-equipped aircraft must have a Mode S transponder, but not all Mode S transponders include TCAS.

  4. Mode C veil - Wikipedia

    en.wikipedia.org/wiki/Mode_C_veil

    The name refers to the mode of transponder operation which is required within this airspace — that is, with very limited exceptions, all aircraft operating within this airspace must have an altitude-reporting Mode C transponder in operation. An additional requirement for the transponder to have ADS-B Out became effective January 1, 2020. [2]

  5. Traffic collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Traffic_collision...

    Also, since ADSB messages can be received at greater range than TCAS normally operates, aircraft can be acquired earlier by the TCAS tracking algorithms. The identity information present in ADSB messages can be used to label other aircraft on the cockpit display (where present), painting a picture similar to what an air traffic controller ...

  6. Airport surveillance and broadcast systems - Wikipedia

    en.wikipedia.org/wiki/Airport_surveillance_and...

    The data that ASDE-X uses comes from a surface movement radar located on the airport traffic control tower or remote tower, multilateration sensors, ADS-B (Automatic Dependent Surveillance-Broadcast) sensors, terminal radars, the terminal automation system, and from aircraft transponders. By fusing the data from these sources, ASDE-X is able to ...

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  8. Future Air Navigation System - Wikipedia

    en.wikipedia.org/wiki/Future_Air_Navigation_System

    The application is known as ADS-C (automatic dependent surveillance, contract). In this system, an air traffic controller can set up a "contract" (software arrangement) with the airplane's navigational system, to automatically send a position report on a specified periodic basis – every 5 minutes, for example.

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