Non-Gaussian Phase Screen Based on log-Poisson Distribution and Effect on Imaging  

作　　者：YUAN Guo-Yong CHEN Shi-Gang 

机构地区：[1]Institute of Applied Physics and Computational Mathematics, P.O. Box 8009, Beijing 100088, China [2]Department of Physics, Hebei Normal University, Shijiazhuang 05{）016, China [3]Hebei Advanced Thin Films Laboratory, Shijiazhuang 050016, China

出　　处：《Communications in Theoretical Physics》2009年第12期1093-1101,共9页理论物理通讯（英文版）

基　　金：Supported by the National Natural Science Foundation Science Foundation of China Academy of Engineering Physics (NSAF) under Grant No.10576005;the National Natural Science Foundation of China under Grant No.10647127;the Science Foundation of Hebei Education Department under Grant No.2009135;the Science Foundation of Hebei Normal University

摘　　要：Gaussian models without intermittency are extensively used in estimating the effect of turbulence,but italso brings some puzzles,for example the observed pulse shape that disagrees with the result of the standard theoryof interstellar scintillations.Indeed the property of intermittency is inherent in turbulence,i.e.,all the quantities thatcharacterize it suffer from strong fluctuations.So it is necessary to consider turbulent intermittency in many applications.In this paper we propose a non-Gaussian phase screen,which obeys log-Poisson statistics,and also offers the correspondingpoint spread function(PSF).These results describe that intermittency leads to the more extent and different directionaldistribution of PSF.Theoretical analysis is made under the hypothesis of the phase difference satisfying log-Poissonstatistics,and the average point spread function,which accord qualitatively with the result of the above generated phasescreen,is derived.

关 键 词：TURBULENCE intermittency log-Poisson distribution phase screen 

分 类 号：TN911.7[电子电信—通信与信息系统] O211.3[电子电信—信息与通信工程]