Relationships Between Ku-Band Radar Backscatter and Integrated Wind and Wave Parameters at Low Incidence Angles
文献类型：期刊论文
| 作者 | Chu, XQ ; He, YJ ; Karaev, VY |
| 刊名 | IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
 |
| 出版日期 | 2012 |
| 卷号 | 50期号:11页码:4599-4609 |
| 关键词 | Integral wave parameter low-incidence-angle remote sensing radar cross section radar signal analysis |
| ISSN号 | 0196-2892 |
| 通讯作者 | yjhe@nuist.edu.cn |
| 中文摘要 | 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. |
| 学科主题 | Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote Sensing |
| 语种 | 英语 |
| WOS记录号 | WOS:000310888600005 |
| 公开日期 | 2013-08-28 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/10081]  |
| 专题 | 南海海洋研究所_热带海洋环境国家重点实验室(LTO) |
| 推荐引用方式 GB/T 7714 | Chu, XQ,He, YJ,Karaev, VY. 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.(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. |
入库方式： OAI收割
来源：南海海洋研究所
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