The validation of HY-2 altimeter measurements of a significant wave height based on buoy data

doi:10.1007/s13131-013-0382-5

IOCAS-IR > 海洋环流与波动重点实验室

	The validation of HY-2 altimeter measurements of a significant wave height based on buoy data
	Wang Jichao 1,2,4; Zhang Jie3 ; Yang Jungang 3; Zhang, J
	2013-11-01
发表期刊	ACTA OCEANOLOGICA SINICA
ISSN	0253-505X
卷号	32 期号:11 页码:87-90
文章类型	Article
摘要	HY-2 has been launched by China on August 16, 2011 which assembles multi-microwave remote sensing payloads in a body and has the ability of monitoring ocean dynamic environments. The HY-2 satellite data need to be calibrated and validated before being put into use. Based on the in-situ buoys from the National Data Buoy Center (NDBC), Ku-band significant wave heights (SWH, hs) of HY-2 altimeter are validated. Eleven months of HY-2 altimeter Level 2 products data are chose from October 1, 2011 to August 29, 2012. Using NDBC 60 buoys yield 902 collocations for HY-2 by adopting collocation criteria of 30 min for temporal window and 50 km for a spatial window. An overall RMS difference of the SWH between HY-2 and buoy data is 0.297 m. A correlation coefficient between these is 0.964. An ordinary least squares (OLS) regression is performed with the buoy data as an independent variable and the altimeter data as a dependent variable. The regression equation of hs is h (s)(HY-2)=0.891xh (s)(NDBC)+0.022. In addition, 2016 collocations are matched with temporal window of 30min at the crossing points of HY-2 and Jason-2 orbits. RMS difference of Ku-band SWH between the two data sets is 0.452 m.; HY-2 has been launched by China on August 16, 2011 which assembles multi-microwave remote sensing payloads in a body and has the ability of monitoring ocean dynamic environments. The HY-2 satellite data need to be calibrated and validated before being put into use. Based on the in-situ buoys from the National Data Buoy Center (NDBC), Ku-band significant wave heights (SWH, hs) of HY-2 altimeter are validated. Eleven months of HY-2 altimeter Level 2 products data are chose from October 1, 2011 to August 29, 2012. Using NDBC 60 buoys yield 902 collocations for HY-2 by adopting collocation criteria of 30 min for temporal window and 50 km for a spatial window. An overall RMS difference of the SWH between HY-2 and buoy data is 0.297 m. A correlation coefficient between these is 0.964. An ordinary least squares (OLS) regression is performed with the buoy data as an independent variable and the altimeter data as a dependent variable. The regression equation of hs is h (s)(HY-2)=0.891xh (s)(NDBC)+0.022. In addition, 2016 collocations are matched with temporal window of 30min at the crossing points of HY-2 and Jason-2 orbits. RMS difference of Ku-band SWH between the two data sets is 0.452 m.
关键词	Altimeter Buoy Significant Wave Height Validation Regression Analysis
学科领域	Oceanography
DOI	10.1007/s13131-013-0382-5
URL	查看原文
收录类别	SCI
语种	英语
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000327079700012
WOS关键词	WIND-SPEED ; ALGORITHMS ; PERIOD
WOS标题词	Science & Technology ; Physical Sciences
引用统计	被引频次：17[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/337002/16445
专题	海洋环流与波动重点实验室
通讯作者	Zhang, J
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China 4.China Univ Petr, Coll Sci, Qingdao 266580, Peoples R China
第一作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Wang Jichao,Zhang Jie,Yang Jungang,et al. The validation of HY-2 altimeter measurements of a significant wave height based on buoy data[J]. ACTA OCEANOLOGICA SINICA,2013,32(11):87-90.
APA	Wang Jichao,Zhang Jie,Yang Jungang,&Zhang, J.(2013).The validation of HY-2 altimeter measurements of a significant wave height based on buoy data.ACTA OCEANOLOGICA SINICA,32(11),87-90.
MLA	Wang Jichao,et al."The validation of HY-2 altimeter measurements of a significant wave height based on buoy data".ACTA OCEANOLOGICA SINICA 32.11(2013):87-90.

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