| WANG He,ZHU Jianhua,LIN Mingsen,HUANG Xiaoqi,ZHAO Yili,CHEN Chuntao,ZHANG Youguang,PENG Hailong. 2013. First six months quality assessment of HY-2A SCAT wind products using in situ measurements. Acta Oceanologica Sinica, 32(11):27－33 |
| First six months quality assessment of HY-2A SCAT wind products using in situ measurements |
| First six months quality assessment of HY-2A SCAT wind products using in situ measurements |
| Received:August 24, 2012 Revised:December 10, 2012 |
| DOI：10.1007/s13131-013-0374-5 |
| Key words:HY-2A satellite microwave scatterometer wind validation |
| 中文关键词: HY-2A satellite microwave scatterometer wind validation |
| 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. |
| Author Name | Affiliation | E-mail | | WANG He | National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China | | | ZHU Jianhua | National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China | besmile@6.net | | LIN Mingsen | National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China | | | HUANG Xiaoqi | National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China | | | ZHAO Yili | National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China | | | CHEN Chuntao | National Ocean Technology Center, State Oceanic Administration, Tianjin 300112, China | | | ZHANG Youguang | National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China | | | PENG Hailong | 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. |
| 中文摘要: |
| 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 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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