湍流大气中光波闪烁的斜程问题研究

Study on the scintillation of optical wave propagation in the slant path through the atmospheric turbulence

根据光波斜程传输理论以及随高度变化的ITU R湍流大气结构常数模型 ,将水平传输的修正Rytov方法扩展到了斜程传输问题中。在零内尺度湍流谱模型下 ,得到了平面波入射时从弱起伏湍流区到强起伏湍流区闪烁指数随斜程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 theory of optical wave propagation in the slant path and the ITU R turbulence structure constant model which is altitude dependent,the modified Rytov method,which is applicable to the propagation in the horizontal path,is extended to the propagation in the slant path. According to the zero inner scale spectrum model,the scintillation index as a function of the Rytov variance is obtained in the weak to strong fluctuation regions with plane wave incidence. Finally, the scintillation index with different zenith angles is discussed in detail