Electronic landmark enhancement to GPS based navigation systems
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United States of America Patent
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May 5, 1998
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N/A
app pub date -
Sep 22, 1995
filing date -
Sep 22, 1995
priority date (Note) -
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Abstract
A system and apparatus for enhancing the satellite based navigation systems which includes providing an aircraft with an interrogating radar for interrogating beacons disposed at a predetermined location in front of a runway wherein the beacons are radar-activated passively powered runway beacons.
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