Measurement of Non-Kolmogorov Turbulence Characteristic Parameter in Atmospheric Surface Layer

Xiaoqing, 吴晓庆 Wu; Yinbo, 黄印博 Huang; Haiping, 梅海平 Mei; Shiyong, 邵士勇 Shao; Honghua, 黄宏华 Huang; Xianmei, 钱仙妹 Qian; Chaolong, 崔朝龙 Cui

doi:10.3788/aos201434.0601001

Cited by 9 publications

(3 citation statements)

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“…This paper grows out of a number of experiments which confirm significant deviations of the turbulence statistics from the classical models in certain portions of the atmosphere [2,28,29,38]. In particular, a strong deviation would imply that the underlying assumption regarding the turbulence statistics in the second SLODAR-based approach is violated and can lead to inaccurate profiling.…”

Section: Introductionmentioning

confidence: 94%

Atmospheric turbulence profiling with unknown power spectral density

et al. 2018

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Adaptive optics (AO) is a technology in modern ground-based optical telescopes to compensate for the wavefront distortions caused by atmospheric turbulence. One method that allows to retrieve information about the atmosphere from telescope data is so-called SLODAR, where the atmospheric turbulence profile is estimated based on correlation data of Shack-Hartmann wavefront measurements. This approach relies on a layered Kolmogorov turbulence model. In this article, we propose a novel extension of the SLODAR concept by including a general non-Kolmogorov turbulence layer close to the ground with an unknown power spectral density. We prove that the joint estimation problem of the turbulence profile above ground simultaneously with the unknown power spectral density at the ground is illposed and propose three numerical reconstruction methods. We demonstrate by numerical simulations that our methods lead to substantial improvements in the turbulence profile reconstruction compared to the standard SLODAR-type approach. Also, our methods can accurately locate local perturbations in non-Kolmogorov power spectral densities.

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Section: Introductionmentioning

confidence: 94%

Atmospheric turbulence profiling with unknown power spectral density

et al. 2018

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“…The Kolmogorov turbulence model is used extensively in considering the turbulence effect of the atmosphere for its simple mathematical structure and usability for numerical calculation [4][5][6]. However, with the increase of theoretical discussion and experimental research [7][8][9], it has been found that Kolmogorov's theory could not always describe the characteristics of actual turbulence, and the non-Kolmogorov turbulence model has been widely applied to evaluate the performance of FSO terminals. Linyan Cui studied the influence of moderate-to-strong non-Kolmogorov turbulence on the imaging system based on the atmospheric turbulence modulation transfer function [10].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Analysis on Statistical Properties of Coupling Efficiency for Single-Mode Fiber in Free-Space Optical Communication Link Based on Non-Kolmogorov Turbulence

Gao

Chen

et al. 2022

Applied Sciences

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Non-Kolmogorov turbulence has been widely observed in free-space optical communication links and should be used to evaluate the system performance. We calculated the wavefront residual variance in the condition of the non-Kolmogorov turbulence model and deduced the mathematical expression of the probability density function (PDF) for the coupling efficiency (CE) of a single-mode fiber (SMF). The PDF was simulated, and the results showed its robustness and rationality. Moreover, an experiment was set up to verify the PDF with experimental distribution. The correlation coefficients are above 0.95 in all cases, which means the statistical model of the CE fitted the experimental distribution well.

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“…n 是一个与海拔高度相关的量。本文使用 Hufnagel-Valley 折射率结构常数模型来分析激光传输的闪烁效应 [7][8] 。 C 2 n (h) = 0.00594(v v /27) 2 (10 -5 h) 10 exp(-h/1000) + 2.7 × 10 -16 exp(-h/1500) + A hv exp(-h/100) ,…”

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Atmosphere Impact and Ground Station Selection for Satellite-to-Ground Laser Communication

Yan¹,

Yi-wu²,

Chunyi³

2014

激光与光电子学进展

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A multiple ground stations scheme satellite-to-ground laser communication is proposed with the geographical distribution of cloud cover and climatic features considered. The effect of attenuation caused by atmospheric scattering and atmospheric turbulence is analyzed for different paths from geosynchronous earth orbit (GEO) satellites to five ground stations. Link characteristics between the GEO satellite and the five ground stations are simulated using the satellite tool kit (STK) software. The results show that Ali region in Tibet has the best longitude and latitude conditions with a horizontal angle of 52°, which is most beneficial to laser satelliteto-ground communications. The power attenuation shows a decreasing trend as the wavelength increases due to scattering under the same weather conditions. The optical power attenuation is intensified as visibility falls. The average power attenuation caused by atmosphere decreases along with the rise of horizontal angle. The longer the wavelength λ , the smaller the scintillation index; the scintillation index decreases rapidly when the diameter of receiving aperture increases; the scintillation variance is improved as altitude increases. The analysis is helpful with field experiments of satellite-to-ground laser communication.

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Measurement of Non-Kolmogorov Turbulence Characteristic Parameter in Atmospheric Surface Layer

Cited by 9 publications

References 0 publications

Atmospheric turbulence profiling with unknown power spectral density

Atmospheric turbulence profiling with unknown power spectral density

Theoretical and Experimental Analysis on Statistical Properties of Coupling Efficiency for Single-Mode Fiber in Free-Space Optical Communication Link Based on Non-Kolmogorov Turbulence

Atmosphere Impact and Ground Station Selection for Satellite-to-Ground Laser Communication

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