14 October 1996 Experimental analysis of image quality for a horizontal overwater propagation
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Abstract
The effect of atmospheric turbulence on the imaging of scenes, for a horizontal propagation of the light over a distance of 20 km, 15 meters above the sea surface, was analyzed at visible wavelength using a 20 cm telescope. Point-sources images were recorded during the night, and the fried parameter r0 was derived leading to values ranging from 1.5 to 3.6 cm. A very high level of scintillation was observed. Studies of correlations between close-by sources lead to a very small domain of isoplanatism. Daytime observations of an extended source area are also performed; an image motion of small spatial coherent length seems to be drawn by a horizontal wind producing wave-like distortion of horizontal lines and boiling-like of vertical ones.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hubert Beaumont, Claude Aime, Eric Aristidi, and Henri Lanteri "Experimental analysis of image quality for a horizontal overwater propagation", Proc. SPIE 2828, Image Propagation through the Atmosphere, (14 October 1996); doi: 10.1117/12.254172; https://doi.org/10.1117/12.254172
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