3 October 2014 Visualizing the effects of distributed volume non-Kolmogorov and anisotropic turbulence on incoherent long horizontal-path imaging
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Abstract
Video imagery is extremely useful in developing an intuitive sense for the effects of atmospheric turbulence in long, horizontal-path imaging. This is especially true when attempting to understand the effects of Non-Kolmogorov and anisotropic turbulence. We have created simulated video sequences featuring a static scene where parameters such as turbulence strength, power-law exponent, direction and degree of anisotropy are varied. Because these image sequences are simulated, it is possible to explore the effects of these parameters using non-subjective measures such as the Mean Squared Error. We find that changing the power-law exponent while leaving the Fried parameter fixed results in more blurring but less anisoplantic tip-tilt distortions at lower power laws. Images have subjectively less blurring and more global tip-tilt distortion when the power law is higher than the Kolmogorov value. We also observe that Mean Squared Error increases approximately linearly with the degree of anisotropy.
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Jeremy P. Bos, Jeremy P. Bos, V. S. Rao Gudimetla, V. S. Rao Gudimetla, } "Visualizing the effects of distributed volume non-Kolmogorov and anisotropic turbulence on incoherent long horizontal-path imaging", Proc. SPIE 9224, Laser Communication and Propagation through the Atmosphere and Oceans III, 92240K (3 October 2014); doi: 10.1117/12.2062086; https://doi.org/10.1117/12.2062086
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