Determination of wind velocity using a non-vertical LIDAR scan

Details Determination of wind velocity using a non-vertical LIDAR scan Determination of wind velocity using a non-vertical LIDAR scan

1994-06-22

1998-03-03

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

356 501, 342107, 342109, G01P 336, G01S 1358

Patent

active

057241252

ABSTRACT:
A system and method for determining wind velocity. The LIDAR 104 transmits a plurality of laser pulses. The paths of the laser pulses surround a center line (206) that does not coincide with a vertical axis (706) intersecting the LIDAR (104), i.e., an off-vertical scan. Each laser pulse reflects off particles in the air at a given location. This location is the intersection of the path of each LIDAR pulse and the target altitude. The target altitude is the altitude at which the wind velocity is to be determined. The reflected pulses are received by the LIDAR (104). The invention groups the received LIDAR pulses according to the altitude at which they were reflected, as opposed to the distance each pulse travels. Grouping the received pulses in this manner enables the invention to perform an off-vertical scan that accurately determines the wind velocity at a target altitude. The received laser pulses have an associated Doppler shift. The Doppler shift is a measure of the relative radial wind velocity at the target location. The invention measures the Doppler shift from a plurality of received laser pulses reflected from the target altitude. These measurements enable the invention to determine the wind velocity at the target location.

REFERENCES:
patent: 3984685 (1976-10-01), Fletcher et al.
patent: 4167329 (1979-09-01), Jelalian et al.
patent: 4652122 (1987-03-01), Zincone et al.
patent: 4875770 (1989-10-01), Rogers et al.
patent: 5048951 (1991-09-01), Combe et al.
patent: 5170218 (1992-12-01), Keene
patent: 5313263 (1994-05-01), Abbiss et al.

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