On SAR wind speed ambiguities and related geophysical model functions

IOCAS-IR > 海洋环流与波动重点实验室

	On SAR wind speed ambiguities and related geophysical model functions
	Shen, Hui 1,2,3; Perrie, William 1; He, Yijun 2
	2009-06-01
发表期刊	CANADIAN JOURNAL OF REMOTE SENSING
ISSN	1712-7971
卷号	35 期号:3 页码:310-319
文章类型	Article
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.
关键词	C-band Ocean Hurricanes Direction Images Fields
学科领域	Remote Sensing
收录类别	SCI
语种	英语
WOS记录号	WOS:000272151600009
引用统计	被引频次：7[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/337002/2388
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, 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
第一作者单位	中国科学院海洋研究所; 海洋环流与波动重点实验室
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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