基于闪烁法的大气湍流廓线测量技术

Atmospheric turbulence profile measurement techniques based on scintillation method

为了研究基于闪烁效应测量湍流强度廓线技术,以SCIDAR、闪烁计阵列和多孔径闪烁测量为基础,介绍了其理论基础、技术设备、发展现状及其优缺点。根据多孔径闪烁测量的基本原理和Hufnagel-Valley5/7湍流廓线模型,采用理论模拟方法,利用奇异值分解法反演得到了湍流强度廓线随高度的分布。从反演结果可以看出:除含有100%噪声的反演结果外,其余结果的量级均为10-15～10-17,与Hufnagel-Valley5/7模型基本一致。说明奇异值分解法可以用于数据的处理,并且基本满足需要。最后,针对现有MASS的缺点提出了改进方案。

In order to research the measurement techniques of turbulence intensity profile based on scintillation effect,the theoretical base,technical plants,current development states,and advantages and disadvantages of scintillation detection and ranging（SCIDAR）,scintillometer array and multi-aperture scintillation sensor,were discussed.According to the basic principle of multi-aperture scintillation measurement and the Hufnagel-Valley 5/7 model of turbulence profile,by means of theoretical simulation,the distribution of turbulence intensity profile as altitude was inversed with singular value decomposition.It could be seen from the inversed results that except the ones with 100% noise,the others were between the order of 10^-15 and 10^-17 and basically agree with the Hufnagel-Valley 5/7 model.It is demonstrated that the singular value decomposition can be used for data processing and meet the requirement.Finally,a modified program to overcome the shortcomings of present MASS was put forward.