Laser ceilometer signal processing means
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United States of America Patent
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Sep 15, 1981
Grant Date -
N/A
app pub date -
Jul 20, 1979
filing date -
Jul 20, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
For use in a pulsed-laser lidar such as a laser ceilometer, there are shown several examples of signal processing means for separating desired pulses due to targets such as clouds from strong background signals due to suspended particles causing poor visibility. The several examples belong to a class of means having the property of applying, to an electrical signal pulse waveform, a time-distributed signed electrical weighting function having negligible total weight, with alternations of sign of weights separated by intervals of the order of the width of the desired pulses.
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