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首页> 外文期刊>Journal of Physical Oceanography >Directional Wavelet Analysis of Inhomogeneity in the Surface Wave Field from Aerial Laser Scanning Data
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Directional Wavelet Analysis of Inhomogeneity in the Surface Wave Field from Aerial Laser Scanning Data

机译：基于航空激光扫描数据的表面波场不均匀性的定向小波分析

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摘要

Modern measurement techniques such as aerial laser scanning allow for rapid determination of the spatial variation of sea surface elevation. Wave fields obtained from such data show spatial inhomogeneity associated with the presence of wave groups. A method based on two-dimensional directional wavelet analysis is described by which such inhomogeneity can be characterized in the spatial and wavenumber domains. The directional wavelet method has been applied to aerial laser scanning measurements of nearshore wave conditions off the east coast of New Zealand's South Island. A high level of spatial variability was observed, with evidence of ensembles of wave-group envelopes of quasi-Gaussian form. These envelopes occur, with variations in spatial location, across a range of wavelet scales and directions.
机译：诸如航空激光扫描的现代测量技术可以快速确定海平面高程的空间变化。从此类数据获得的波场显示出与波群的存在相关的空间不均匀性。描述了一种基于二维方向小波分析的方法，通过这种方法可以在空间域和波数域中表征这种不均匀性。定向小波方法已被用于对新西兰南岛东海岸近岸波浪条件进行空中激光扫描测量。观察到高水平的空间变异性，并有类似准高斯型波群包络的证据。这些包络在一系列小波尺度和方向上随空间位置的变化而发生。

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