光学学报, 2014, 34 (s2): s201003, 网络出版: 2014-12-02
两种大气相干长度测量方法对比分析
Comparison and Analysis about Two Measuring Methods of Atmospheric Coherence Length
大气光学 大气相干长度 光强闪烁 差分像运动测量 atmospheric optics atmospheric coherence length light intensity scintillation differential image motion measure
摘要
大气相干长度是大气光学研究领域中定量描述大气湍流介质的重要参量之一。分别介绍了大气相干长度的光强闪烁法和差分像运动测量法,并利用边界层闪烁仪和大气相干长度仪同时间同地点测量了戈壁某地近地面一公里传输路径上的大气相干长度,通过实验观测对比发现利用闪烁法测量的结果比利差分像运动法测量大气相干长度的值略小,但其量级和时间变化趋势基本一致。
Abstract
Atmospheric coherence length is one of the important parameters of describing atmospheric turbulence in atmospheric optics. The methods of atmospheric coherence length measurement light intensity scintillation and differential image motion measure (DIMM) are introduced. The atmospheric coherence length along level propagation path is synchronously measured by boundary layer scintillometer (BLS900) and DIMM in gobi area. The result of light intensity scintillation measurement is smaller than the value of DIMM, but the magnitude and time variations are similar.
李志朝, 宗飞, 徐云岫, 强希文. 两种大气相干长度测量方法对比分析[J]. 光学学报, 2014, 34(s2): s201003. Li Zhichao, Zong Fei, Xu Yunxiu, Qiang Xiwen. Comparison and Analysis about Two Measuring Methods of Atmospheric Coherence Length[J]. Acta Optica Sinica, 2014, 34(s2): s201003.