| First six months quality assessment of HY-2A SCAT wind products using in situ measurements |
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| 作者姓名： | WANG He ZHU Jianhu LIN Mingsen HUANG Xiaoqi ZHAO Yili CHEN Chuntao ZHANG Youguang PENG Hailong |
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| 作者单位： | National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China;National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China;National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China;National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China |
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| 基金项目： | The Marine Public Welfare Project of China under contract No. 201105032;the National High-Tech Project of China under contract No. 2008AA09A403;and the fund of State Administration for Science, Technology and Industry for National Defense. |
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| 摘 要： | The first Chinese microwave ocean environment satellite HY-2A, carrying a Ku-band scatteromenter （SCAT）, was successfully launched in August 2011. The first quality assessment of HY-2A SCAT wind products is presented through the comparison of the first 6 months operationally released SCAT products with in situ data. The in situ winds from the National Data Buoy Center （NDBC） buoys, R/V Polarstern, Aurora Australis, Roger Revelle and PY30-1 oil platform, were converted to the 10 m equivalent neutral winds. The temporal and spatial differences between the HY-2A SCAT and the in situ observations were limited to less than 5 min and 12.5 km. For HY-2A SCAT wind speed products, the comparison and analysis using the NDBC buoys yield a bias of-0.49 m/s, a root mean square error （RMSE） of 1.3 m/s and an increase negative bias with increasing wind speed observation above 3 m/s. Although less accurate of HY-2A SCAT wind direction at low winds, the RMSE of 19.19° with a bias of 0.92° is found for wind speeds higher than 3 m/s. These results are found consistent with those from R/Vs and oil platform comparisons. Moreover, the NDBC buoy comparison results also suggest that the accuracy of HY-2A SCAT winds is consistent over the first half year of 2012. The encouraging assessment results over the first 6 months show that wind products from HY-2A SCAT will be useful for scientific community.
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| 关 键 词： | 质量评估 产品 原位测量 均方根误差 资料浮标 风速观测 石油平台 环境卫星 |
| 收稿时间： | 2012/8/24 0:00:00 |
| 修稿时间： | 2012/12/10 0:00:00 |
First six months quality assessment of HY-2A SCAT wind products using in situ measurements |
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| WANG He,ZHU Jianhu,LIN Mingsen,HUANG Xiaoqi,ZHAO Yili,CHEN Chuntao,ZHANG Youguang,PENG Hailong.First six months quality assessment of HY-2A SCAT wind products using in situ measurements[J].Acta Oceanologica Sinica,2013,32(11):27-33. |
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| Authors: | WANG He ZHU Jianhu LIN Mingsen HUANG Xiaoqi ZHAO Yili CHEN Chuntao ZHANG Youguang and PENG Hailong |
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| Affiliation: | 1.National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China2.National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China |
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| Abstract: | The first Chinese microwave ocean environment satellite HY-2A, carrying a Ku-band scatteromenter (SCAT), was successfully launched in August 2011. The first quality assessment of HY-2A SCAT wind products is presented through the comparison of the first 6 months operationally released SCAT products with in situ data. The in situ winds fromtheNationalData Buoy Center (NDBC) buoys, R/V Polarstern, Aurora Australis, Roger Revelle and PY30-1 oil platform, were converted to the 10 m equivalent neutral winds. The temporal and spatial differences between the HY-2A SCAT and the in situ observations were limited to less than 5 min and 12.5 km. For HY-2A SCAT wind speed products, the comparison and analysis using the NDBC buoys yield a bias of -0.49 m/s, a root mean square error (RMSE) of 1.3 m/s and an increase negative bias with increasing wind speed observation above 3m/s. Although less accurate of HY-2A SCAT wind direction at low winds, the RMSE of 19.19° with a bias of 0.92° is found for wind speeds higher than 3 m/s. These results are found consistent with those fromR/Vs and oil platformcomparisons. Moreover, the NDBC buoy comparison results also suggest that the accuracy of HY-2A SCAT winds is consistent over the first half year of 2012. The encouraging assessment results over the first 6 months show that wind products from HY-2A SCAT will be useful for scientific community. |
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| Keywords: | HY-2A satellite microwave scatterometer wind validation |
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