The surveillance system provides a means to augment Automatic Dependent Surveillance-Broadcast
(ADS-B) with "look alike ADS-B" or "pseudo ADS-B" surveillance transmissions for
aircraft which may not be ADS-B equipped. The system uses ground based surveillance
to determine the position of aircraft not equipped with ADS-B, then broadcasts
the identification/positional information over the ADS-B data link. ADS-B equipped
aircraft broadcast their own position over the ADS-B data link. The system enables
aircraft equipped with ADS-B and Cockpit Display of Traffic Information (CDTI)
to obtain surveillance information on all aircraft whether or not the proximate
aircraft are equipped with ADS-B.
