UDC 504.3
The backscatter enhancement (BSE) effect of laser radiation in a turbulent atmosphere was investigated. The primary objective was to determine the dependence of the backscatter enhancement factor (BSE) distribution along a horizontal or inclined path on the spatial distribution of the structural characteristic of the refractive index Cn2(z). Using numerical simulation, BSE distributions were obtained for a number of characteristic inhomogeneous turbulence profiles (homogeneous background, localized layers, and zones without disturbances). It was established that BSE behavior depends not only on the integrated turbulence intensity but also on its derivative and the location of inhomogeneities in the path. It was shown that at a high background level or in the presence of sharp layered inhomogeneities, the existing analytical model by Vorobiev does not coincide with the actual BSE behavior.
optical turbulence, refractive index constant, backscatter enhancement effect, lidar, remote sensing
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