CROSSWIND SPEED MEASUREMENT BY OPTICAL MEASUREMENT OF SCINTILLATION
First Claim
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1. A device for optically measuring crosswind, comprising:
- a laser transmitter adapted to illuminate a target with a laser through an atmosphere;
a receiver comprising a single photodiode and adapted to analyze a return path of the laser through the atmosphere, the receiver receiving modulated scattered laser radiation due to temperature gradients in the atmosphere; and
the device adapted to compare intensities of the received modulated scattered laser radiation from the receiver and measures a crosswind profile along a path to the target.
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Abstract
The present disclosure describes methods and systems for measuring crosswind speed by optical measurement of laser scintillation. One method includes projecting radiation into a medium, receiving, over time, with a photodetector receiver, a plurality of scintillation patterns of scattered radiation, comparing cumulative a radiation intensity for each received scintillation pattern of the received plurality of scintillation patterns, and measuring a cumulative weighted average cross-movement within the medium using the compared cumulative radiation intensities.
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Citations
20 Claims
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1. A device for optically measuring crosswind, comprising:
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a laser transmitter adapted to illuminate a target with a laser through an atmosphere; a receiver comprising a single photodiode and adapted to analyze a return path of the laser through the atmosphere, the receiver receiving modulated scattered laser radiation due to temperature gradients in the atmosphere; and the device adapted to compare intensities of the received modulated scattered laser radiation from the receiver and measures a crosswind profile along a path to the target. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A device for optically measuring a cross-movement profile within a medium to a target, comprising:
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a plurality of receivers spaced apart at a particular distance, each receiver adapted to receive, over time, a plurality of snapshots of a moving scintillation pattern of modulated scattered radiation from a substantially common direction, the movement of the scintillation pattern due to temperature gradients in a medium; and the device adapted to compare intensities of the received moving scintillation pattern snapshots from each receiver and to measure a cross-movement profile within the medium, the measurement of the cross-movement profile a function of the particular spacing between, and a size of, each of the plurality of receivers. - View Dependent Claims (12, 13, 14)
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15. A method for measuring cross-movement within a medium to a target for medium-profiling purposes, comprising:
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projecting radiation into a medium; receiving, over time, with a photodetector receiver, a plurality of scintillation patterns of scattered radiation; comparing a cumulative radiation intensity for each received scintillation pattern of the received plurality of scintillation patterns; and measuring a cumulative weighted average cross-movement within the medium using the compared cumulative radiation intensities. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification