Internal wave detection and wavelength estimation
Internal wave detection and wavelength estimation
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DOI：
10.1109/igarss.1999.773434
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发表时间：
1999-06
期刊：
影响因子：
--
通讯作者：
M. Marghany
中科院分区：
文献类型：
--
作者：
M. Marghany
遥感技术被认为是利用遥感数据研究海洋内波的潜力。TOPSAR极化数据能够映射内波，因为TOPSAR极化数据对小尺度表面粗糙度的变化很敏感。本研究的目的是模拟内波的速度，方向和波长。在这项研究中，使用二维（2-D）小波变换内波检测和波长估计小波分析的效用进行了研究。连续小波变换也被用来估计能量和孤子峰值内的波长从检测到的内波。多普勒雷达被用来估计内波的速度。由TOPSAR极化数据得到的结果与等温剖面相似。结果表明，小波变换与多普勒模型的结合是一种很好的内波检测方法。与C波段相比，极化的L波段更适合检测内波。内波的等温线表明，不规则的海底地形和潮流是南海内波产生的主要原因。
Remote sensing techniques are recognized as the potential of using remotely sensed data for studying oceanic internal waves. TOPSAR polarised data are able to map internal waves because TOPSAR polarised data are sensitive to changes in the small-scale surface roughness. The aim of this study is to model internal wave speed, direction and wavelength. In this study, the utility of wavelet analysis is examined using two-dimensional (2-D) wavelet transform for internal wave detection and wavelength estimation. The continuous wavelet transforms is also used to estimate energies and wavelengths within soliton peaks from the detect internal wave. The Doppler radar was used to estimate the speed of the internal wave. The results obtained from TOPSAR polarised data are similar to isothermal profile. It can be concluded that the integration between the wavelet transform and Doppler model is an excellent tool to detect internal wave. The polarised L-band is more suitable for detection of internal waves compared to C-band. The isothermal profile of the internal wave suggested that the irregular bottom topography and tidal flow are a main reason for generating internal waves in the South China Sea.