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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 NameAffiliationE-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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