Estimation of Sea Surface Current from X-Band Marine Radar Images by Cross-Spectrum Analysis
文献类型：期刊论文
| 作者 | He, Yijun; Chen, Zhongbiao; Zhang, Biao; Kudryavtsev, Vladimir1; Chu, Xiaoqing2 |
| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2019 |
| 卷号 | 11期号:9页码:1031 |
| 关键词 | X-band marine radar sea surface current nearshore cross-spectrum |
| ISSN号 | 2072-4292 |
| DOI | 10.3390/rs11091031 |
| 英文摘要 | The cross-spectral correlation approach has been used to estimate the wave spectrum from optical and radar images. This work aims to improve the cross-spectral approach to derive current velocity from the X-band marine radar image sequence, and evaluate the application conditions of the method. To reduce the dependency of gray levels on range and azimuth, radar images are preprocessed by the contrast-limited adaptive histogram equalization. Two-dimensional cross-spectral coherence and phase are derived from neighboring X-band marine radar images, and the phases with large coherences are used to estimate the phase velocity and angular frequency of waves, which are first fitted with the theoretical dispersion relation by different least square models, and then the current velocity can be determined. Compared with the current velocities measured by a current meter, the root-mean-square error, correlation coefficient, bias, and relative error are 0.15 m/s. 0.88, -0.05 m/s, and 7.79% for the north-south velocity, and 0.14 m/s, 0.86, 0.06 m/s, and 10.75% for the east-west velocity in the experimental area, respectively. The preprocessing, critical coherence, and the number of images for applying the cross-spectral approach, are discussed. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17726]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 作者单位 | 1.Nanjing Univ Informat Sci & Technol, Jiangsu Engn Technol Res Ctr Marine Environm Dete, Sch Marine Sci, Nanjing 210044, Jiangsu, Peoples R China 2.Russian State Hydrometeorol Univ, Satellite Oceanog Lab, St Petersburg 195196, Russia 3.Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China |
| 推荐引用方式 GB/T 7714 | He, Yijun,Chen, Zhongbiao,Zhang, Biao,et al. Estimation of Sea Surface Current from X-Band Marine Radar Images by Cross-Spectrum Analysis[J]. REMOTE SENSING,2019,11(9):1031. |
| APA | He, Yijun,Chen, Zhongbiao,Zhang, Biao,Kudryavtsev, Vladimir,&Chu, Xiaoqing.(2019).Estimation of Sea Surface Current from X-Band Marine Radar Images by Cross-Spectrum Analysis.REMOTE SENSING,11(9),1031. |
| MLA | He, Yijun,et al."Estimation of Sea Surface Current from X-Band Marine Radar Images by Cross-Spectrum Analysis".REMOTE SENSING 11.9(2019):1031. |
入库方式： OAI收割
来源：南海海洋研究所
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