Development of Wind Speed Retrieval from Cross-Polarization Chinese Gaofen-3 Synthetic Aperture Radar in Typhoons
Shao, WZ; Yuan, XZ; Sheng, YX; Sun, J; Zhou, W; Zhang, QJ; shaoweizeng@zjou.edu.cn; harley_yuan@mail.nsoas.org.cn; shengyexin@hotmail.com; sunjian77@ouc.edu.cn; zhouwei@scsio.ac.cn; ztzhangqj@163.com
2018
发表期刊SENSORS
卷号18期号:2页码:-412
摘要The purpose of our work is to determine the feasibility and effectiveness of retrieving sea surface wind speeds from C-band cross-polarization (herein vertical-horizontal, VH) Chinese Gaofen-3 (GF-3) SAR images in typhoons. In this study, we have collected three GF-3 SAR images acquired in Global Observation (GLO) and Wide ScanSAR (WSC) mode during the summer of 2017 from the China Sea, which includes the typhoons Noru, Doksuri and Talim. These images were collocated with wind simulations at 0.12 degrees grids from a numeric model, called the Regional Assimilation and Prediction System-Typhoon model (GRAPES-TYM). Recent research shows that GRAPES-TYM has a good performance for typhoon simulation in the China Sea. Based on the dataset, the dependence of wind speed and of radar incidence angle on normalized radar cross (NRCS) of VH-polarization GF-3 SAR have been investigated, after which an empirical algorithm for wind speed retrieval from VH-polarization GF-3 SAR was tuned. An additional four VH-polarization GF-3 SAR images in three typhoons, Noru, Hato and Talim, were investigated in order to validate the proposed algorithm. SAR-derived winds were compared with measurements from Windsat winds at 0.25 degrees grids with wind speeds up to 40 m/s, showing a 5.5 m/s root mean square error (RMSE) of wind speed and an improved RMSE of 5.1 m/s wind speed was achieved compared with the retrieval results validated against GRAPES-TYM winds. It is concluded that the proposed algorithm is a promising potential technique for strong wind retrieval from cross-polarization GF-3 SAR images without encountering a signal saturation problem.
部门归属[Shao, Weizeng; Sheng, Yexin] Zhejiang Ocean Univ, Marine Sci & Technol Coll, Zhoushan 316022, Peoples R China; [Yuan, Xinzhe] State Ocean Adm, Natl Satellite Ocean Applicat Serv, Beijing 100081, Peoples R China; [Sun, Jian] Ocean Univ China, CIMST, Phys Oceanog Lab, Qingdao 266100, Peoples R China; [Sun, Jian] Qingdao Natl Lab Marine Sci & Technol, Qingdao 266100, Peoples R China; [Zhou, Wei] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Zhang, Qingjun] Beijing Inst Spacecraft Syst Engn, Beijing 100076, Peoples R China
关键词Wind Speed Typhoon Cross-polarization Gaofen-3 Sar
学科领域Chemistry ; Electrochemistry ; Instruments & Instrumentation
资助项目LTO
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/17096
专题热带海洋环境国家重点实验室(LTO)
通讯作者shaoweizeng@zjou.edu.cn; harley_yuan@mail.nsoas.org.cn; shengyexin@hotmail.com; sunjian77@ouc.edu.cn; zhouwei@scsio.ac.cn; ztzhangqj@163.com
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Shao, WZ,Yuan, XZ,Sheng, YX,et al. Development of Wind Speed Retrieval from Cross-Polarization Chinese Gaofen-3 Synthetic Aperture Radar in Typhoons[J]. SENSORS,2018,18(2):-412.
APA Shao, WZ.,Yuan, XZ.,Sheng, YX.,Sun, J.,Zhou, W.,...&ztzhangqj@163.com.(2018).Development of Wind Speed Retrieval from Cross-Polarization Chinese Gaofen-3 Synthetic Aperture Radar in Typhoons.SENSORS,18(2),-412.
MLA Shao, WZ,et al."Development of Wind Speed Retrieval from Cross-Polarization Chinese Gaofen-3 Synthetic Aperture Radar in Typhoons".SENSORS 18.2(2018):-412.
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