GF-3 SAR Ocean Wind Retrieval: The First View and Preliminary Assessment

doi:10.3390/rs9070694

	GF-3 SAR Ocean Wind Retrieval: The First View and Preliminary Assessment
	Wang, He 1; Yang, Jingsong 2; Mouche, Alexis 3; Shao, Weizeng 4; Zhu, Jianhua 1; Ren, Lin 2; Xie, Chunhua 5
刊名	REMOTE SENSING
	2017-07
卷号	9 期号:7
关键词	GF-3 synthetic aperture radar (SAR) ocean surface wind validation
ISSN号	2072-4292
DOI	10.3390/rs9070694
英文摘要	Gaofen-3 (GF-3) is the first Chinese civil C-band synthetic aperture radar (SAR) launched on 10 August 2016 by the China Academy of Space Technology (CAST), which operates in 12 imaging modes with a fine spatial resolution up to 1 m. As one of the primary users, the State Oceanic Administration (SOA) operationally processes GF-3 SAR Level-1 products into ocean surface wind vector and plans to officially release the near real-time SAR wind products in the near future. In this paper, the methodology of wind retrieval at C-band SAR is introduced and the first results of GF-3 SAR-derived winds are presented. In particular, the case of the coastal katabatic wind off the west coast of the U.S. captured by GF-3 is discussed. The preliminary accuracy assessment of wind speed and direction retrievals from GF-3 SAR is carried out against in situ measurements from National Data Buoy Center (NDBC) buoy measurements of National Oceanic and Atmospheric Administration (NOAA). Only the buoys located inside the GF-3 SAR wind cell (1 km) were considered as co-located in space, while the time interval between observations of SAR and buoy was limited to less the 30 min. These criteria yielded 56 co-locations during the period from January to April 2017, showing the Root Mean Square Error (RMSE) of 2.46 m/s and 22.22 degrees for wind speed and direction, respectively. Different performances due to geophysical model function (GMF) and Polarization Ratio (PR) are discussed. The preliminary results indicate that GF-3 wind retrievals are encouraging for operational implementation.
资助项目	Dragon-4 project[32249]
WOS关键词	SYNTHETIC-APERTURE RADAR ; C-BAND ; POLARIZATION-RATIO ; SURFACE ; SEA ; RESOURCE ; SPEED ; ENVISAT ; IMAGERY ; FIELDS
WOS研究方向	Remote Sensing
语种	英语
出版者	MDPI AG
WOS记录号	WOS:000406676800057
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25478]
专题	自然资源部第一海洋研究所
通讯作者	Wang, He
作者单位	1.State Ocean Adm, Natl Ocean Technol Ctr, Tianjin 300112, Peoples R China 2.State Ocean Adm, Inst Oceanog 1, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China 3.IFREMER, Lab Oceanog Phys & Spatiale, F-29280 Plouzane, France 4.Zhejiang Ocean Univ, Marine Acoust & Remote Sensing Lab, Zhoushan 316000, Peoples R China 5.State Ocean Adm, Natl Satellite Ocean Applicat Serv, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Wang, He,Yang, Jingsong,Mouche, Alexis,et al. GF-3 SAR Ocean Wind Retrieval: The First View and Preliminary Assessment[J]. REMOTE SENSING,2017,9(7).
APA	Wang, He.,Yang, Jingsong.,Mouche, Alexis.,Shao, Weizeng.,Zhu, Jianhua.,...&Xie, Chunhua.(2017).GF-3 SAR Ocean Wind Retrieval: The First View and Preliminary Assessment.REMOTE SENSING,9(7).
MLA	Wang, He,et al."GF-3 SAR Ocean Wind Retrieval: The First View and Preliminary Assessment".REMOTE SENSING 9.7(2017).