Calculating structure function constant from measured C n 2 in non-Kolmogorov and anisotropic turbulence including inner scale effects

Optical scintillometers used to characterize turbulence are based on assumptions of isotropic, Kolmogorov turbulence following a κ spectral power law. However, experimental data suggest that the turbulence may at times be anisotropic and non-Kolmogorov. In this work, consideration is given to conver...

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Bibliographic Details
Published in:Applied optics (2004) 2019-09, Vol.58 (25), p.6813
Main Authors: Beason, Melissa, Andrews, Larry, Toselli, Italo
Format: Article
Language:English
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Summary:Optical scintillometers used to characterize turbulence are based on assumptions of isotropic, Kolmogorov turbulence following a κ spectral power law. However, experimental data suggest that the turbulence may at times be anisotropic and non-Kolmogorov. In this work, consideration is given to converting from the structure function constant, Cn2, based on isotropic, Kolmogorov statistics to its generalized anisotropic, non-Kolmogorov form, C˜n2, for point receiver and large-aperture receiver scintillometers. It is found that C˜n2 is dependent not only on power law and anisotropy parameters but that it is also a function of inner scale. The large-aperture scintillometer is found to be less sensitive to power law and inner scale than the point-aperture receiver. The optical parameters of two-fielded scintillometers are modeled as practical examples of these behaviors.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.58.006813