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	On SAR wind speed ambiguities and related geophysical model functions
	Shen, Hui1,2,3; Perrie, William1; He, Yijun2
刊名	CANADIAN JOURNAL OF REMOTE SENSING
	2009-06-01
卷号	35期号:3页码:310-319
关键词	C-band Ocean Hurricanes Direction Images Fields
ISSN号	1712-7971
文献子类	Article
英文摘要	Recent investigations show that normalized radar cross sections for C-band microwave sensors decrease under high wind conditions with certain incident angles instead of increase, as is the case for low to moderate wind speeds. This creates the problem of ambiguities in high wind speed retrievals from synthetic aperture radar (SAR). In the present work, four geophysical model functions (GMFs) are studied, namely the high wind C-band model 4 (CMOD4HW), C-band model 5 (CMOD5), the high wind vertical polarized GMF (HWGMF_VV), and the high wind horizontal polarized GMF (HWGMF_HH). Our focus is on model behaviours relative to wind speed ambiguities. We show that, except for CMOD4HW, the other GMFs exhibit the wind speed ambiguity problem. To consider this problem in high wind speed retrievals from SAR, we focus on hurricanes and propose a method to remove the speed ambiguity using the dominant hurricane wind structure.; Recent investigations show that normalized radar cross sections for C-band microwave sensors decrease under high wind conditions with certain incident angles instead of increase, as is the case for low to moderate wind speeds. This creates the problem of ambiguities in high wind speed retrievals from synthetic aperture radar (SAR). In the present work, four geophysical model functions (GMFs) are studied, namely the high wind C-band model 4 (CMOD4HW), C-band model 5 (CMOD5), the high wind vertical polarized GMF (HWGMF_VV), and the high wind horizontal polarized GMF (HWGMF_HH). Our focus is on model behaviours relative to wind speed ambiguities. We show that, except for CMOD4HW, the other GMFs exhibit the wind speed ambiguity problem. To consider this problem in high wind speed retrievals from SAR, we focus on hurricanes and propose a method to remove the speed ambiguity using the dominant hurricane wind structure.
学科主题	Remote Sensing
语种	英语
WOS记录号	WOS:000272151600009
公开日期	2010-12-22
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/2389]
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, Dartmouth, NS B2Y 4A2, Canada 2.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Key Lab Ocean Circulat & Waves KLOCAW, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Shen, Hui,Perrie, William,He, Yijun. On SAR wind speed ambiguities and related geophysical model functions[J]. CANADIAN JOURNAL OF REMOTE SENSING,2009,35(3):310-319.
APA	Shen, Hui,Perrie, William,&He, Yijun.(2009).On SAR wind speed ambiguities and related geophysical model functions.CANADIAN JOURNAL OF REMOTE SENSING,35(3),310-319.
MLA	Shen, Hui,et al."On SAR wind speed ambiguities and related geophysical model functions".CANADIAN JOURNAL OF REMOTE SENSING 35.3(2009):310-319.

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