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Measurements of the atmospheric turbulence spectrum and intermittency using laser scintillation

机译:使用激光闪烁法测量大气湍流谱和间歇性

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Abstract: Simultaneous measurements of the spatial intensity covariance of laser scintillation and the variance of integrated intensity collected by multiple circular apertures provide sufficient information to determine the form of the atmospheric turbulence spectrum over short spatial and temporal scales. This ensures local stationary of the turbulence. The estimated parameters of the turbulence spectrum (level of turbulence C$+2$/$-n$/ and inner scale) over these stationary events provide accurate estimates of the intermittency of atmospheric turbulence. The advantages of laser scintillation measurements include spatial averaging that improves statistical accuracy, true measurements of spatial statistics without the need to convert temporal statistics to spatial using Taylor's hypothesis, remote sensing of atmospheric turbulence which reduces contamination by support structures, and rugged instrumentation for reliable measurements. New uses of laser scintillation measurements will be discussed.!
机译:摘要:同时测量激光闪烁的空间强度协方差和由多个圆形孔收集的积分强度的方差可提供足够的信息来确定短时空尺度上大气湍流谱的形式。这确保了湍流的局部静止。在这些静止事件上的湍流频谱估计参数(湍流水平C $ + 2 $ / $-n $ /和内部尺度)提供了大气湍流间歇性的准确估计。激光闪烁测量的优势包括提高平均统计精度的空间平均,无需使用泰勒假设将时间统计转换为空间的真实空间统计测量,减少支撑结构污染的大气湍流遥感以及用于可靠测量的坚固仪器。将讨论激光闪烁测量的新用途。

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