Vol. 3, issue 11, article # 6

Abstract:

This paper presents the results of theoretical study of the random displacement of an optical image in a turbulent atmospheric layer under precipitation conditions. The variance of the image displacement is calculated on the basis of a solution of the equation for the fourth-order field coherence function using a perturbation technique. The conditions under which the contribution of atmospheric precipitation to the fluctuations of the displacement of the optical image centroid exceeds that of the atmospheric turbulence have been found. It is shown that atmospheric precipitation has a significant effect on the fluctuations of the displacement of the IR image centroid for virtually any size of the receiving aperture.

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