Accuracy Assessment of HY-2A Scatterometer Wind Measurements During 2011-2017 by Comparison With Buoys, ASCAT, and ERA-Interim Data

doi:10.1109/LGRS.2018.2879909

	Accuracy Assessment of HY-2A Scatterometer Wind Measurements During 2011-2017 by Comparison With Buoys, ASCAT, and ERA-Interim Data
	Yang, Jungang; Zhang, Jie
刊名	IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
	2019-05
卷号	16 期号:5 页码:727-731
关键词	Advanced Scatterometer (ASCAT) HY-2A scatterometer (HSCAT) oceanic wind scatterometer
ISSN号	1545-598X
DOI	10.1109/LGRS.2018.2879909
英文摘要	Chinese satellite HY-2A, carrying a Ku-band scatterometer (HSCAT), was launched in August 2011. This letter validates wind vectors retrieved by the HSCAT during October 2011-July 2017 by comparing with wind data recorded by global moored buoys, the Advanced Scatterometer (ASCAT), and ERA-Interim. HSCAT wind data are collocated with moored-buoy observations made by the National Data Buoy Center, tropical atmosphere ocean/triangle trans-ocean buoy network, pilot research moored array in the Tropical Atlantic, and research moored array for African-Asian-Australian monsoon analysis and prediction. Only buoys located offshore are selected. Their spatial and temporal differences are limited to 25 km and 30 min. The results show that the HSCAT wind speed has bias of 0.09-0.28 m/s and root-mean-square error (RMSE) of 1.24-1.52 m/s, which satisfies the mission specification of less than 2 m/s. The HSCAT wind direction has bias of 0.8 degrees-0.9 degrees and RMSE of 21.5 degrees -25.8 degrees, which is close to the mission specification of less than 20 degrees. The HSCAT wind retrievals are overestimates at wind speeds lower than 5 m/s. The RMSEs of the HSCAT wind speed and direction decrease with increasing wind speed. Wind vectors from HSCAT and ASCAT are compared using spatial and temporal windows of 0.1 degrees and 10 min. Results show the consistency of the wind speed; RMSEs of wind speed and direction are 1.50 m/s and 22.90 degrees. The comparison of HSCAT and ERS-Interim wind data shows that the HSCAT provides global ocean wind data at the level required for data application.
资助项目	National Natural Science Foundation of China[41576176]
WOS关键词	SATELLITE ; PRODUCTS
WOS研究方向	Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS记录号	WOS:000466228400013
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/24747]
专题	自然资源部第一海洋研究所
通讯作者	Yang, Jungang
作者单位	State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Yang, Jungang,Zhang, Jie. Accuracy Assessment of HY-2A Scatterometer Wind Measurements During 2011-2017 by Comparison With Buoys, ASCAT, and ERA-Interim Data[J]. IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,2019,16(5):727-731.
APA	Yang, Jungang,&Zhang, Jie.(2019).Accuracy Assessment of HY-2A Scatterometer Wind Measurements During 2011-2017 by Comparison With Buoys, ASCAT, and ERA-Interim Data.IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,16(5),727-731.
MLA	Yang, Jungang,et al."Accuracy Assessment of HY-2A Scatterometer Wind Measurements During 2011-2017 by Comparison With Buoys, ASCAT, and ERA-Interim Data".IEEE GEOSCIENCE AND REMOTE SENSING LETTERS 16.5(2019):727-731.