摘要
根据湍流大气弱起伏区中的经典Rytov解 ,利用修正的湍流谱 ,将光波的强度起伏看成是由小尺度湍流起伏乘以大尺度湍流起伏的调制所决定的 ,在非零内尺度湍流模型下 ,得到了平面波和球面波入射时从弱湍流区到强湍流区闪烁指数随Rytov方差的变化规律 .最后讨论了零内尺度模型下归一化强度协方差函数随湍流强度的变化情况 .
Based on the conventional Rytov method in a weakly atmospheric turbulence and by using the modified spectrum, the fluctuation of optical wave can be modeled as a modulation process in which small scale fluctuations are multiplicatively modulated by large scale fluctuations, and the scintillation index as a function of the Rytov variance is obtained from weak to strong fluctuation regions by using the non zero inner model with plane wave or spherical wave incidence. Finally, the variation of the normalized covariance function of intensity with different strengths of turbulence under zero inner model is discussed in detail.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2001年第3期273-277,共5页
Journal of Xidian University
基金
教育部高等学校优秀青年教师教学和科研奖励基金资助项目
关键词
湍流大气
光波闪烁
电波传播
atmospheric turbulence
optical scintillation
propagation
modification of the Rytov method
covariance function of intensity
