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On SAR wind speed ambiguities and related geophysical model functions
Shen, Hui1,2,3; Perrie, William1; He, Yijun2
2009-06-01
发表期刊CANADIAN JOURNAL OF REMOTE SENSING
ISSN1712-7971
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
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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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