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Determination of internal wave properties from X-Band radar observations

机译：从X波段雷达观测确定内波特性

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摘要

The application of nautical X-Band radars to measure internal wave (IW) properties is investigated. A methodology based on the use of Radon transform (RT) techniques to detect internal wave related features from backscatter image sequences is introduced to compute properties such as direction of propagation, non-linear velocity (c_o), distance between solitons (L_(cc)) and number of solitons per packet. The proposed methodology was applied to several events recorded by a ship-mounted X-Band radar system (WaMoS) during the NLIWI experiment in 2006. Results from the comparisons to simultaneous measurements taken at neighboring oceanographic moorings indicated that c_o can be estimated with a RMS error of 0.06 ms~(-1), which corresponds to a mean relative error of -1.4%. Similarly, L_(cc) can be estimated with a RMS error of 98 m, which is associated with a mean relative error of 14.6%. This latter error estimate however is likely to be overestimated, because it reflects strongly the separation between sampling stations as L_(cc) was shown to be highly dependent on propagation distance. The accuracy of the results shows that X-Band systems are well suited to measure internal wave properties offering some advantages over SAR and other in situ devices.
机译：研究了航海X波段雷达在测量内波（IW）特性方面的应用。介绍了一种基于Radon变换（RT）技术从后向散射图像序列中检测与内部波相关的特征的方法，以计算诸如传播方向，非线性速度（c_o），孤子之间的距离（L_（cc） ）和每个数据包的孤子数。拟议的方法应用于2006年NLIWI实验期间由船载X波段雷达系统（WaMoS）记录的多个事件。比较结果与邻近海洋系泊处同时进行的测量结果表明，可以用RMS估算c_o误差为0.06 ms〜（-1），对应于-1.4％的平均相对误差。类似地，可以估计出L_（cc）的RMS误差为98 m，其平均相对误差为14.6％。但是，后一种误差估计可能会被高估，因为它强烈反映了采样站之间的距离，因为L_（cc）被证明高度依赖于传播距离。结果的准确性表明，X波段系统非常适合测量内部波属性，与SAR和其他现场设备相比，它们具有一些优势。

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  • 来源
    《Ocean Engineering》 |2009年第14期|1039-1047|共9页
  • 作者

    Rafael J. Ramos; Bjoern Lund; Hans C. Graber;

  • 作者单位

    Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Cswy, Miami, FL 33149, USA;

    Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Cswy, Miami, FL 33149, USA;

    Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Cswy, Miami, FL 33149, USA;

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  • 正文语种 eng
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  • 关键词

    internal waves; X-band radar; remote sensing; radon transform; image processing;

    机译：内部波浪X波段雷达;遥感;don变换图像处理;

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