Method and apparatus for improving utility of automatic dependent surveillance
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United States of America Patent
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-
May 20, 2003
Grant Date -
Feb 21, 2002
app pub date -
Oct 9, 2001
filing date -
Mar 5, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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