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Restoring atmospheric-turbulence-degraded images
Applied Optics, 2016Image data experiences geometric distortions and spatial-temporal varying blur due to the strong effects of random spatial and temporal variations in the optical refractive index of the communication path. Simultaneously removing these effects from an image is a challenging task.
Md Hasan, Furhad +2 more
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In-flight investigations of atmospheric turbulence
Aerospace Science and Technology, 1998Abstract One of the key technologies in aeronautics offering substantial improvements in the fields of economy and ecology is the laminar flow technology. The sensitivity of the laminar boundary layer flow over aerodynamically smooth surfaces to the effects of disturbances like noise, vibration and insect contamination as well as the atmospheric ...
Riedel, H., Sitzmann, M.
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Atmospheric turbulence mitigation based on turbulence extraction
2016 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2016A video taken under the influence of atmospheric turbulence suffers from serious distortion caused by the variation of optical refractive index. In order to reduce geometric distortion and time-space-varying blur, and recover both coarse structure and fine details, a novel turbulence extraction based approach for recovering a latent image from an ...
Renjie He +3 more
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2008
This book, authored by a well-known researcher and expositor in meteorology, focuses on the direct link between molecular dynamics, turbulence theory, fluid mechanics and non equilibrium statistical mechanics, it is relevant to the fields of applied mathematics, physics and atmospheric sciences, and focuses on fluid flow and turbulence, as well as on ...
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This book, authored by a well-known researcher and expositor in meteorology, focuses on the direct link between molecular dynamics, turbulence theory, fluid mechanics and non equilibrium statistical mechanics, it is relevant to the fields of applied mathematics, physics and atmospheric sciences, and focuses on fluid flow and turbulence, as well as on ...
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Fiber-optic atmospheric turbulence sensor
Optics Letters, 1995A novel dual-air-gap fiber-optic Mach - Zehnder interferometer is proposed for the direct measurement of the atmospheric optical turbulence structure constant C(n)(2). The shot-noise-limited minimum detectable structure constant is estimated to be 4.5 x 10(-20) m(-2/3), which is more than 2 orders of magnitude below a typical value of 10(-17) m(-2/3 ...
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Atmospheric Turbulence Measurement System
SPIE Proceedings, 1985Since the summer of 1983, Georgia Tech and NOAA have been engaged in a program whose purpose is to measure, the effects of atmospheric turbulence on the propagation of millimeter waves (MMW). Five different measurement sessions have been conducted, and observations have been made in clear air, rain, fog, and snow at frequencies of 116, 118, 142, 173 ...
R. W. McMillan +8 more
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The Structure of Atmospheric Turbulence
Theory of Probability & Its Applications, 1958Theoretical and experimental data are given for the statistical characteristics of random fields of wind velocity and turbulent fluctuations of temperature in the lowest layer of the atmosphere. Fluctuations are considered at one and two space time points.
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Holography through the Atmospheric Turbulence
1972It is well known that the velocity of propagation of an e.m. wave in the vacuum is c = 3 108 m/sec.
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Spectrum of Atmospheric Turbulence
Nature, 1951DR. E. C. S. MEGAW1 opens his valuable contribution to this subject with a challenging remark. He says, “knowledge of the average properties of turbulence in the free atmosphere is almost totally lacking”. Actually, so many meteorologists have published observations that it would be impossible here to give an adequate list of them. As long ago as 1926,
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Atmospheric Turbulence and Diffusion
1951The Nature of Turbulent Flow. A particle in a stream of fluid can never follow a perfectly smooth path because of minute random disturbances arising from the molecular structure of the fluid (Brownian motion), but observation shows that, in certain circumstances, oscillations appear in the path which are much too large to be ascribed to molecular ...
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