Passive target detection and identification system
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United States of America Patent
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Aug 14, 2001
Grant Date -
N/A
app pub date -
Apr 3, 1984
filing date -
Apr 3, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A passive target positioning system utilizes three stations positioned on a linear baseline with a central master station positioned predetermined distances from two slave stations. Angle to the target is determined from the time differences of arrival at the master station and each of the slave stations. Range to the target, in one embodiment, is determined from the difference of the two time difference of arrival measurements and the angle-to-target, while in a second embodiment from the time differences of arrival. A scannable antenna with frequency selection capability provides a spatial sector and frequency band selectivity.
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