POSITION DETERMINING METHOD AND SYSTEM USING SURVEILLANCE GROUND STATIONS
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United States of America Patent
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N/A
Issued Date -
Nov 29, 2012
app pub date -
Apr 24, 2012
filing date -
May 27, 2011
priority date (Note) -
Abandoned
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Abstract
An aircraft avionics system and method for automatically determining an aircraft position. The system and method determine distances to UAT ground stations based on timing signals in transmissions from the UAT ground stations and determines one or more possible positions for the aircraft at which the aircraft is at the determined distances from respective UAT ground stations. The system and method may use three or more UAT ground stations to reduce the possible positions for the aircraft to a single possible position. The system and method also may use dead reckoning or VOR or ADF signals to reduce the possible positions for the aircraft to a single possible position. The system and method may also determine the position of an aircraft by determining true bearings to SSR ground stations and determining the possible positions for the aircraft at which the aircraft is at respective bearings to each SSR ground station.
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