Speed ambiguity in hurricane wind retrieval from SAR imagery

doi:10.1080/01431160802555879

IOCAS-IR > 海洋环流与波动重点实验室

	Speed ambiguity in hurricane wind retrieval from SAR imagery
	Shen, Hui 2,3; He, Yijun 3; Perrie, W.1
	2009
发表期刊	INTERNATIONAL JOURNAL OF REMOTE SENSING
ISSN	0143-1161
卷号	30 期号:11 页码:2827-2836
文章类型	Article
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.
关键词	Tropical Cyclones System
学科领域	Remote Sensing ; Imaging Science & Photographic Technology
DOI	10.1080/01431160802555879
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000267263000007
引用统计	被引频次：31[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2390
专题	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
第一作者单位	海洋环流与波动重点实验室; 中国科学院海洋研究所
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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