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同步测量大气湍流折射率结构常数和内尺度的光学方法
引用本文:朱文越,赵柱灵,马晓珊,饶瑞中.同步测量大气湍流折射率结构常数和内尺度的光学方法[J].强激光与粒子束,2005,17(10):1461-1464.
作者姓名:朱文越  赵柱灵  马晓珊  饶瑞中
作者单位:中国科学院 安徽光学精密机械研究所,安徽 合肥 230031
基金项目:国家863计划项目资助课题
摘    要: 基于不同波长的光闪烁,采用修正的大气湍流Hill谱模型,提出了一种同时反演大气湍流内尺度及折射率结构常数的方法。假定内尺度在某一个范围内取值,对于不同波长的闪烁指数,如果当内尺度取某一定值时,由光传输理论计算的C2n1,…)和C2n (λ2,…)相等,反演成功。根据此原理设计了三波长闪烁计并在某地进行了外场测量。近地面大气湍流的内尺度一般在2~10 mm之间,且随折射率结构常数(其量级为10-16~10-13)的变化而变化,两者之间存在一定的正相关;任意两波长组合进行反演得到的内尺度(或折射率结构常数)值具有自洽性,其相关系数的最小值为0.81,因此证明了该方法的可行性。

关 键 词:内尺度  折射率结构常数  修正Hill谱  光闪烁  大气湍流
文章编号:1001-4322(2005)10-1461-04
收稿时间:2005-01-20
修稿时间:2005-06-17

Optical method for simultaneously measuring refractive-index structure parameter and inner scale of atmospheric turbulence
ZHU Wen-yue,ZHAO Zhu-ling,MA Xiao-shan,RAO Rui-zhong.Optical method for simultaneously measuring refractive-index structure parameter and inner scale of atmospheric turbulence[J].High Power Laser and Particle Beams,2005,17(10):1461-1464.
Authors:ZHU Wen-yue  ZHAO Zhu-ling  MA Xiao-shan  RAO Rui-zhong
Institution:Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O.Box 1125, Hefei 230031, China
Abstract:The principle is as follows: Supposing the inner scale has a specific value,the refractive-index structure parameters areequal for different wavelengths,which is based on the optical-propagation theory using the modified Hill spectrum with the inner scaleeffect.According to the proposed inversion principle,a three-wavelength scintillometer was designed for the reliability verification in thelaser propagation trials.The results showthat the inner scale near the land surface is generally between 2 and 10 mm,and it will vary ac-cordingly as the refractive-index structure parameter changes.Moreover,some experiments also demonstrate that the method is reliable bythe inverted values of any two wavelengths,of which the minimum correlation coefficient is 0.81.
Keywords:Inner scale  Refractive-index structure parameter  Modified Hill spectrum  Optical scintillation  Atmos0pheric turbulence
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