Process and apparatus for finding stealthcraft
First Claim
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1. An apparatus for detecting both stealth-modified and conventional targets where background returns are detectable, and comprising:
- (a) means for producing a first steerable narrow beam,(b) means for receiving the returns from said first steerable narrow beam,(c) sequence dependent distinguishing means for distinguishing the background returns from said first steerable narrow beam from the returns from said targets,(d) means for constructing background images from said background returns, and(e) means for finding the dark patches in said background images that result when said first steerable narrow beam is at least one of absorbed, reflected and refracted by said targets.
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Abstract
Stealthcraft are detected by illuminating backgrounds with narrow radar or sonar beams and monitoring this background illumination for the changes that result when these beams are absorbed by such targets, and are ranged by triangulation using two such beams.
63 Citations
15 Claims
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1. An apparatus for detecting both stealth-modified and conventional targets where background returns are detectable, and comprising:
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(a) means for producing a first steerable narrow beam, (b) means for receiving the returns from said first steerable narrow beam, (c) sequence dependent distinguishing means for distinguishing the background returns from said first steerable narrow beam from the returns from said targets, (d) means for constructing background images from said background returns, and (e) means for finding the dark patches in said background images that result when said first steerable narrow beam is at least one of absorbed, reflected and refracted by said targets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A process for confirming detection of conventional radar and sonar targets from target returns, and comprising:
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(a) scanning a target area by transmitting a first coded beam, (b) scanning the target area by transmitting a second coded beam that scans at least a portion of, and produces returns distinguishably different from, those from said first coded beam, (c) receiving the returns from said first and said second coded beams, (d) comparing the codes of said returns with suitably delayed replicas of the codes of the signals transmitted to find target-return pairs corresponding to points of intersection of said first and said second coded beams, and (e) confirming the detection of said targets from said target-return pairs.
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Specification