考虑内尺度效应时光波闪烁的斜程传输研究

Study of the scintillation for optical wave propagation in the slant path through the atmospheric turbulence by considering the inner scale effect

根据修正Rytov方法和随高度变化的ITU R湍流大气结构常数模型 ,研究了湍流大气中光波传播的斜程问题 .在非零内尺度湍流谱模型下 ,得到了平面波和球面波入射时从弱起伏湍流区到强起伏湍流区斜程闪烁指数随斜程Rytov方差的变化规律 ,最后讨论了闪烁指数随天顶角的变化情况 .

Based on the modified Rytov method and the ITU-R turbulence structure constant model which is altitude dependent, the optical propagation along the slant path in turbulence is studied. According to the spectrum model with non-zero inner scale, the scintillation index as a function of the Rytov variance is obtained from weak to strong fluctuation regions with plane wave and sphere wave incidence respectively. Finally, the variation of scintillation index with different zenith angles is analyzed.