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	Speed ambiguity in hurricane wind retrieval from SAR imagery
	Shen, Hui2,3; He, Yijun3; Perrie, W.1
刊名	INTERNATIONAL JOURNAL OF REMOTE SENSING
	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
内容类型	期刊论文
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.

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