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Processing of turbulence-layer wind speed with Generalized SCIDAR through wavelet analysis

机译:基于小波分析的广义SCIDAR处理湍流层风速

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摘要

We describe a new method involving wavelet transforms for deriving the wind velocity associated with atmospheric turbulence layers from Generalized SCIDAR measurements. The algorithm analyses the cross-correlation of a series of scintillation patterns separated by lapses of Dt, 2Dt, 3Dt, 4Dt and 5Dt using wavelet transforms. Wavelet analysis provides the position, direction and altitude of the different turbulence layers detected in each cross-correlation. The comparison and consistency of the turbulent layer displacements in consecutive cross-correlations allow the determination of their velocities and avoid misidentifications associated with noise and/or overlapping layers. To validate the algorithm, we have compared the velocity of turbulence layers derived on four nights with the wind vertical profile provided by balloon measurements. The software is fully automated and is able to analyse huge amounts of Generalized SCIDAR measurements.
机译:我们描述了一种涉及小波变换的新方法,用于从广义SCIDAR测量值推导与大气湍流层相关的风速。该算法使用小波变换分析了一系列由Dt,2Dt,3Dt,4Dt和5Dt的间隔分开的闪烁模式的互相关。小波分析提供了在每个互相关中检测到的不同湍流层的位置,方向和高度。连续互相关中湍流层位移的比较和一致性允许确定其速度,并避免与噪声和/或重叠层相关的错误识别。为了验证该算法,我们将四个晚上得出的湍流层速度与气球测量值提供的垂直风廓线进行了比较。该软件是完全自动化的,能够分析大量的广义SCIDAR测量。

著录项

  • 作者

    Fuensalida, B G L J J;

  • 作者单位
  • 年度 2006
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  • 原文格式 PDF
  • 正文语种 eng
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