Speed ambiguity in hurricane wind retrieval from SAR imagery
文献类型：期刊论文
| 作者 | Shen, Hui2,3; He, Yijun3; Perrie, W.1 |
| 刊名 | INTERNATIONAL JOURNAL OF REMOTE SENSING
 |
| 出版日期 | 2009 |
| 卷号 | 30期号:11页码:2827-2836 |
| 关键词 | Tropical Cyclones System |
| ISSN号 | 0143-1161 |
| DOI | 10.1080/01431160802555879 |
| 文献子类 | Article |
| 英文摘要 | Under strong ocean surface wind conditions, the normalized radar cross section of synthetic aperture radar (SAR) is dampened at certain incident angles, compared with the signals under moderate winds. This causes a wind speed ambiguity problem in wind speed retrievals from SAR, because two solutions may exist for each backscattered signal. This study shows that the problem is ubiquitous in the images acquired by operational space-borne SAR sensors. Moreover, the problem is more severe for the near range and range travelling winds. To remove this ambiguity, a method was developed based on characteristics of the hurricane wind structure. A SAR image of Hurricane Rita (2005) was analysed to demonstrate the wind speed ambiguity problem and the method to improve the wind speed retrievals. Our conclusions suggest that a speed ambiguity removal algorithm must be used for wind retrievals from SAR in intense storms and hurricanes.; Under strong ocean surface wind conditions, the normalized radar cross section of synthetic aperture radar (SAR) is dampened at certain incident angles, compared with the signals under moderate winds. This causes a wind speed ambiguity problem in wind speed retrievals from SAR, because two solutions may exist for each backscattered signal. This study shows that the problem is ubiquitous in the images acquired by operational space-borne SAR sensors. Moreover, the problem is more severe for the near range and range travelling winds. To remove this ambiguity, a method was developed based on characteristics of the hurricane wind structure. A SAR image of Hurricane Rita (2005) was analysed to demonstrate the wind speed ambiguity problem and the method to improve the wind speed retrievals. Our conclusions suggest that a speed ambiguity removal algorithm must be used for wind retrievals from SAR in intense storms and hurricanes. |
| 学科主题 | Remote Sensing ; Imaging Science & Photographic Technology |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000267263000007 |
| 公开日期 | 2010-12-22 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/2391]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 作者单位 | 1.Fisheries & Oceans Canada, Bedford Inst Oceanog, Maritimes Reg, Dartmouth, NS B2Y 4A2, Canada 2.Chinese Acad Sci, KLOCAW, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shen, Hui,He, Yijun,Perrie, W.. Speed ambiguity in hurricane wind retrieval from SAR imagery[J]. INTERNATIONAL JOURNAL OF REMOTE SENSING,2009,30(11):2827-2836. |
| APA | Shen, Hui,He, Yijun,&Perrie, W..(2009).Speed ambiguity in hurricane wind retrieval from SAR imagery.INTERNATIONAL JOURNAL OF REMOTE SENSING,30(11),2827-2836. |
| MLA | Shen, Hui,et al."Speed ambiguity in hurricane wind retrieval from SAR imagery".INTERNATIONAL JOURNAL OF REMOTE SENSING 30.11(2009):2827-2836. |
入库方式： OAI收割
来源：海洋研究所
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