Relationships Between Ku-Band Radar Backscatter and Integrated Wind and Wave Parameters at Low Incidence Angles
Chu, XQ; He, YJ; Karaev, VY; yjhe@nuist.edu.cn
2012
发表期刊IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
ISSN0196-2892
卷号50期号:11页码:4599-4609
摘要By using ten years of collocated Precipitation Radar and buoy data, the relationships between Ku-band normalized radar cross section (sigma(o)) and integrated wind and wave parameters (e. g., significant wave height, wave period, wave steepness, and wave age) at low incidence angles are analyzed for different sea states using correlation and dependence analysis. The results show that the relationships are significantly different for different sea states. Second, the potential for inverting these parameters directly from a single sigma(o) is investigated. The results reveal that the retrieval of wind speed above 10 m (U-10) is most suitable for a nonpure-swell sea and that the performance of significant wave height (H-s) retrieval decreases with the ratio of swell to wind waves. For wave period and wavelength, a feasible inversion can only be performed for a wind-wave-dominated sea. Wave steepness (delta(a)) is strongly correlated with sigma(o) in all sea states and can even be higher than that for U-10 in pure-swell seas. It is suggested from the present data set that real wave age (beta) may be retrieved from a swell-dominated sea and, therefore, has a low-value cutoff. Furthermore, the extent to which U-10 retrieval depends on sea state is examined by calculating the correlation coefficient between sigma(o) residuals and various standard wave parameters and, then, by determining the partial correlation coefficient between sigma(o) and each wave parameter controlled by U-10. Both results indicate that wind direction is better taken into account above 13.5 degrees. Moreover, an auxiliary parameter related to wave slope, such as wave steepness, would help to improve retrieval performance. Significant wave height data are of secondary use, but an implementation with real wave age information might not significantly improve wind speed retrieval. To improve the performance of H-s and wave period retrieval, auxiliary information, such as wind speed, wave steepness, or wave age, is needed. Finally, multivariable empirical models are proposed.
部门归属[Chu, Xiaoqing] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [He, Yijun] Nanjing Univ Informat Sci & Technol, Sch Marine Sci, Nanjing 210044, Jiangsu, Peoples R China; [Karaev, V. Yu] Russian Acad Sci, Lab Radiophys Methods Res Ocean, Inst Appl Phys, Nizhnii Novgorod 603950, Russia
关键词Integral Wave Parameter Low-incidence-angle Remote Sensing Radar Cross Section Radar Signal Analysis
学科领域Geochemistry & Geophysics ; Engineering, Electrical & Electronic ; Remote Sensing
语种英语
资助项目LTO
WOS记录号WOS:000310888600005
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10081
专题热带海洋环境国家重点实验室(LTO)
通讯作者yjhe@nuist.edu.cn
推荐引用方式
GB/T 7714
Chu, XQ,He, YJ,Karaev, VY,et al. Relationships Between Ku-Band Radar Backscatter and Integrated Wind and Wave Parameters at Low Incidence Angles[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,2012,50(11):4599-4609.
APA Chu, XQ,He, YJ,Karaev, VY,&yjhe@nuist.edu.cn.(2012).Relationships Between Ku-Band Radar Backscatter and Integrated Wind and Wave Parameters at Low Incidence Angles.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,50(11),4599-4609.
MLA Chu, XQ,et al."Relationships Between Ku-Band Radar Backscatter and Integrated Wind and Wave Parameters at Low Incidence Angles".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 50.11(2012):4599-4609.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Relationships Betwee(1436KB) 开放获取--请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。