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C²_n(λ₁,...)和C²_n(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.

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.