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Method-and-apparatus-for-improving-utility-of-automatic-dependent-surveillance

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Method and apparatus for improving utility of automatic dependent surveillance

Details

Inventors: Smith, Alexander E.; Evers, Carl;
Assignee: Rannoch Corporation (Alexandria, VA)
Primary Examiner: Phan; Dao
Assistant Examiner:
Attorney, Agent or Firm: Bell; Robert Platt

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.

DETAILED DESCRIPTION The present invention provides an improved apparatus and method for use with Automatic Dependent Surveillance--Broadcast (ADS-B).
In a method and apparatus of the present invention, each ADS-B equipped aircraft may periodically broadcast its position as derived from its navigation system.
Aircraft with ADS-B receivers may then be able to receive these broadcasts to obtain the location of proximate ADS-B equipped aircraft.
The invention provides a means to augment ADS-B transmissions with position and identification information of aircraft which may not be ADS-B equipped.
In addition, the present invention reinforces ADS-B transmissions in areas where line-of-sight or multipath issues prevent reliable ADS-B communications between two aircraft.

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