Vol. 29, issue 04, article # 5

Abstract:

Simultaneous crosswind and strength of atmospheric turbulence are estimated by the classical laser scintillation method and passive optical method from analysis of the light scattered by a natural or man-made topographic objects in natural daylight illumination conditions. The passive sensing method does not require artificial light sources a consists in the formation of incoherent images of topographic objects in the natural sunlight and analysis of image distortions induced by turbulence between the object and the plane of observation. The estimates of integral crosswind and index of refraction structure constant of air were compared in atmospheric experiments at the same measuring optical path by both methods. The comparison with lidar data was made. Optical measurements of integral characteristics were accompanied by independent local acoustic measurements using a sonic anemometer.

Keywords:

wind velocity, turbulence, optical imaging, spatio-temporal correlation

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