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ADS-B (Automatic Dependent Surveillance - Broadcast) is a surveillance technology that works by broadcasting GNSS position, velocity and identity to interested parties. It can be used as a supplement to or alternative to radar systems for tracking aircraft. It is a component of the FAA's NextGen ATC improvements, as well as the European SESAR programme.

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there is already something like that, the primary and secondary radars allows for positional data to be received by the controller, so adding this is superfluous from FAA's standpoint. To do this volu …
answered Mar 12 '14 by ratchet freak