基于多孔径闪烁的湍流强度廓线反演方法研究

以多孔径闪烁方法的理论为基础,分别讨论了孔径滤波函数和光谱响应函数对权重函数的影响.根据包括边界层项的Hufnagel-Valley 5/7模型得到的闪烁指数,采用奇异值分解法反演了垂直方向的湍流强度廓线,结果的量级介于10~(-15)~10~(-17)之间,并随高度的增加不断减小,在量级和趋势上与理论模型基本一致;同时结合Shack-Hartman的实际测量结果,反演了水平方向1 km传输路径上的湍流强度分布状况.水平方向反演结果的量级在10~(-14)~10~(-15)之间,随传播距离的变化趋势与实验场地的实际情况较为符合,随时间的变化趋势与合肥地区同期的统计结果基本一致.

Inversion Method for Turbulence Profile Based upon Multi-aperture Scintillation Sensor

Based on the theory of multi-aperture scintillation sensor,the contribution of aperture filter function and spectral response function to weighting function are discussed,respectively.According to simulation results of scintillation with Hufnagel-Valley 5/7 model included bounding layer,vertical turbulence profile is inversed with the method of singular value decomposition.The magnitudes of the vertical inversion results are between and ,and decreases with height increased,which are all in accord with academic model.Using the measuring results of Shack-Hartman,horizontal turbulence profile is inversed,the transmission distance of which is 1 km.The magnitudes of horizontal inversion results are between 10~(-14) and 10~(-15),and the tendency accords the practice condition of experimental site depending on propagation distance,and accords the ensemble average depending on time.