Significant wave height estimation from shipborne marine radar data using convolutional and self-attention network

IF 2.2 3区 地球科学 Q2 OCEANOGRAPHY Ocean Dynamics Pub Date : 2023-12-28 DOI:10.1007/s10236-023-01591-7
Fupeng Wang, Xiaoliang Chu, Baoxue Zhang
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Abstract

In this paper, a fusion model based on convolution and self-attention with multi-subimage input model (CNN-SA-MS) is proposed to estimate significant wave height (SWH) from shipborne X-band radar images. The model takes multiple radar subimages as input simultaneously, which not only improves the accuracy of SWH inversion by including more information, but also avoids the restriction of selecting a single subimage in the upwind direction and dependence on external devices for wind data provision. Based on the characteristics of radar images and computational efficiency considerations, this paper selects three radar subimages as the input for the model. The comparison data from buoys and ECMWF are used for training and testing. After averaging the results of 64 radar images, the root mean square error (RMSE) and correlation coefficient (CC) of the CNN-SA-MS model are 0.197 m and 0.903, respectively. The results show that the CNN-SA-MS model improves the accuracy and stability of SWH estimation compared to single-subimage CNN regression model. For the two time periods with significant discrepancies between radar data and ECMWF predictions, we introduce satellite altimeter information as a source of reference for evaluation. The resulting analysis indicates that the significant wave height estimates generated by CNN-SA-MS model are more reliable.

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利用卷积和自我关注网络从船载海洋雷达数据中估算波高
本文提出了一种基于卷积和自注意的多子图像输入模型(CNN-SA-MS)融合模型,用于从船载 X 波段雷达图像估算显著波高(SWH)。该模型将多个雷达子图像同时作为输入,不仅通过包含更多信息提高了 SWH 反演的准确性,而且避免了只选择上风方向单个子图像的限制和风数据提供对外部设备的依赖。基于雷达图像的特点和计算效率的考虑,本文选择三个雷达子图像作为模型的输入。来自浮标和 ECMWF 的对比数据用于训练和测试。对 64 幅雷达图像的结果取平均值后,CNN-SA-MS 模型的均方根误差(RMSE)和相关系数(CC)分别为 0.197 m 和 0.903。结果表明,与单子图像 CNN 回归模型相比,CNN-SA-MS 模型提高了 SWH 估计的精度和稳定性。对于雷达数据与 ECMWF 预测值差异较大的两个时段,我们引入了卫星高度计信息作为评估的参考源。结果分析表明,CNN-SA-MS 模型生成的显著波高估计值更为可靠。
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来源期刊
Ocean Dynamics
Ocean Dynamics 地学-海洋学
CiteScore
5.40
自引率
0.00%
发文量
37
审稿时长
6-12 weeks
期刊介绍: Ocean Dynamics is an international journal that aims to publish high-quality peer-reviewed articles in the following areas of research: Theoretical oceanography (new theoretical concepts that further system understanding with a strong view to applicability for operational or monitoring purposes); Computational oceanography (all aspects of ocean modeling and data analysis); Observational oceanography (new techniques or systematic approaches in measuring oceanic variables, including all aspects of monitoring the state of the ocean); Articles with an interdisciplinary character that encompass research in the fields of biological, chemical and physical oceanography are especially encouraged.
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