Calculating structure function constant from measured Cn 2 in non-Kolmogorov and anisotropic turbulence including inner scale effects.
Calculating structure function constant from measured Cn 2 in non-Kolmogorov and anisotropic turbulence including inner scale effects.
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DOI：
10.1364/ao.58.006813
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发表时间：
2019-09
期刊：
影响因子：
1.9
通讯作者：
Melissa Beason;L. Andrews;I. Toselli
中科院分区：
文献类型：
--
作者：
Melissa Beason;L. Andrews;I. Toselli
用于表征湍流的光学湍流计基于各向同性的假设，遵循κ-11/3谱功率定律的Kolmogorov湍流。然而，实验数据表明，湍流有时可能是各向异性和非柯尔莫哥洛夫。在这项工作中，考虑到转换的结构函数常数，Cn 2，基于各向同性，柯尔莫哥洛夫统计的广义各向异性，非柯尔莫哥洛夫形式，Cn 2，点接收器和大口径接收器的检波器。结果表明，C_（？）n_2不仅与幂律和各向异性参数有关，而且还是内尺度的函数.大口径微波辐射计对幂律和内尺度的敏感性低于点口径接收机。作为这些行为的实际例子，两个领域的光电探测器的光学参数建模。
Optical scintillometers used to characterize turbulence are based on assumptions of isotropic, Kolmogorov turbulence following a κ-11/3 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.