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  2. Transponder (aeronautics) - Wikipedia

    en.wikipedia.org/wiki/Transponder_(aeronautics)

    A transponder (short for trans mitter-res ponder [1] and sometimes abbreviated to XPDR, [2] XPNDR, [3] TPDR [4] or TP [5]) is an electronic device that produces a response when it receives a radio-frequency interrogation. Aircraft have transponders to assist in identifying them on air traffic control radar. Collision avoidance systems have been ...

  3. Air traffic control radar beacon system - Wikipedia

    en.wikipedia.org/wiki/Air_traffic_control_radar...

    The air traffic control radar beacon system ( ATCRBS) is a system used in air traffic control (ATC) to enhance surveillance radar monitoring and separation of air traffic. It consists of a rotating ground antenna and transponders in aircraft. The ground antenna sweeps a narrow vertical beam of microwaves around the airspace.

  4. 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]

  5. York and Adams County property transfers: See recent home ...

    www.aol.com/york-adams-county-property-transfers...

    8905 Maple Grove Rd, Paradise Twp: Sensenig Real Estate to Darby Wisner, $299,900. 6181 York Rd, Heidelberg Twp: 500 Inc to Daniel Darling, $230,000. 58 E George St, New Salem: Joshua Barker to ...

  6. Traffic information service – broadcast - Wikipedia

    en.wikipedia.org/wiki/Traffic_information_service...

    Traffic information service – broadcast. Traffic information service – broadcast ( TIS–B) is an aviation information service that allows pilots to see aircraft that are not emitting ADS-B data but have a basic transponder . As aircraft are discovered by primary radar and respond with encoded altitude information, this information is ...

  7. Why the Pentagon’s overtures to the private space industry ...

    www.aol.com/finance/why-pentagon-overtures...

    The Pentagon’s overtures to the private sector provide further proof that future conflicts will be decided not only on the ground but also in space. Satellites are already essential military ...

  8. York & Adams County property transfers: See what $998K gets ...

    www.aol.com/york-adams-county-property-transfers...

    Dallastown Area School District. 161 W Crestlyn Dr, York Twp: Grant Yell to Matthew Hoertz, $539,900. 449 Dartha Dr, York Twp: Carson Rohrbaugh to Martin Buddenbohn, $325,000. 2702 Steeple Chase ...

  9. Rebecca/Eureka transponding radar - Wikipedia

    en.wikipedia.org/wiki/Rebecca/Eureka...

    The Rebecca/Eureka transponding radar was a short-range radio navigation system used for the dropping of airborne forces and their supplies. It consisted of two parts, the Rebecca airborne transceiver and antenna system, and the Eureka ground-based transponder. Rebecca calculated the range to the Eureka based on the timing of the return signals ...