Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
The validation of HY-2 altimeter measurements of a significant wave height based on buoy data | |
Wang Jichao1,2,4; Zhang Jie3; Yang Jungang3; 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 | |
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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