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米氏散射激光雷达测量大气湍流剖面的模拟与分析

Simulation and Analysis of Mie-Scattering Lidar-Measuring Atmospheric Turbulence Profile.

作者信息

Lu Yuqing, Mao Jiandong, Zhang Yingnan, Zhao Hu, Zhou Chunyan, Gong Xin, Wang Qiang, Zhang Yi

机构信息

School of Electrical and Information Engineering, North Minzu University, North Wenchang Road, Yinchuan 750021, China.

Key Laboratory of Atmospheric Environment Remote Sensing of Ningxia Province, North Wenchang Road, Yinchuan 750021, China.

出版信息

Sensors (Basel). 2022 Mar 17;22(6):2333. doi: 10.3390/s22062333.

DOI:10.3390/s22062333
PMID:35336504
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8954404/
Abstract

Based on the residual turbulent scintillation theory, the Mie-scattering lidar can measure the intensity of atmospheric turbulence by detecting the light intensity scintillation index of the laser return signal. In order to evaluate and optimize the reliability of the Mie-scattering lidar system for detecting atmospheric turbulence, the appropriate parameters of the Mie-scattering lidar system are selected and optimized using the residual turbulent scintillation theory. Then, the Fourier transform method is employed to perform the numerical simulation of the phase screen of the laser light intensity transformation on the vertical transmission path of atmospheric turbulence. The phase screen simulation, low-frequency optimization, and scintillation index calculation methods are provided in detail, respectively. Based on the phase distribution of the laser beam, the scintillation index is obtained. Through the relationship between the scintillation index and the atmospheric turbulent refractive index structure constant, the atmospheric turbulence profile is inverted. The simulation results show that the atmospheric refractive index structure constant profile obtained by the iterative method is consistent with the input HV model below 6500 m, which has great guiding significance to carry out actual experiments to measure atmospheric turbulence using the Mie lidar.

摘要

基于剩余湍流闪烁理论，米氏散射激光雷达可通过探测激光回波信号的光强闪烁指数来测量大气湍流强度。为了评估和优化米氏散射激光雷达系统探测大气湍流的可靠性，利用剩余湍流闪烁理论对米氏散射激光雷达系统的相关参数进行选取和优化。然后，采用傅里叶变换方法对大气湍流垂直传输路径上激光光强变换的相位屏进行数值模拟。分别详细给出了相位屏模拟、低频优化和闪烁指数计算方法。基于激光束的相位分布，得到闪烁指数。通过闪烁指数与大气湍流折射率结构常数的关系，反演得到大气湍流廓线。模拟结果表明，迭代方法得到的大气折射率结构常数廓线在6500 m以下与输入的HV模型一致，这对利用米氏激光雷达开展实际大气湍流测量实验具有重要的指导意义。

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