基于多孔径闪烁的湍流强度廓线反演方法研究

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

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-Valley5/7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1km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.

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^-4 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.