Validation of Chinese HY-2 satellite radar altimeter significant wave height

YE Xiaomin; LIN Mingsen; XU Ying

doi:10.1007/s13131-015-0667-y

中国HY-2卫星雷达高度计有效波高真实性检验

doi: 10.1007/s13131-015-0667-y

1.
College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China;State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China
2.
National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China
3.
College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China

基金项目: The Public Science and Technology Research Funds Projects of Ocean under contract Nos 201105032, 201305032 and 201005030; the National High Technology Research and Development Program (863 Program) of China under contract No. 2013AA09A505; Global Change and Air-Sea Interaction Project of China under contract No. GASI-03-03-01-01; the International Science & Technology Cooperation Program of China under contract No. 2011DFA22260; the Open funds of State Key Laboratory of Satellite Ocean Environment Dynamics under contract No. SOED1411.

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- 收稿日期: 2014-11-27
- 修回日期: 2015-01-29

Validation of Chinese HY-2 satellite radar altimeter significant wave height

1.
College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China;State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China
2.
National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China
3.
College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China

摘要

摘要: 海洋二号(HY-2)卫星是中国第一颗海洋动力环境卫星。搭载于HY-2上的双频(Ku和C波段)雷达高度计有效地提供了超过3年(2011年10月1日至今)的业务化有效波高产品。本文利用美国国家浮标中心(NDBC)实测数据对HY-2高度计沿轨Ku波段有效波高数据进行了检验, 均方根误差和平均偏差分别为0.38 m和-0.13±0.35m;利用Jason-2对HY-2卫星高度计有效波高进行了交叉检验, 均方根误差和平均偏差分别为0.36 m和-0.22±0.28 m。为比较HY-2和Jason-2的检验统计结果, 在相同的方法下, 利用NDBC数据对Jason-2卫星高度计沿轨Ku波段有效波高进行了检验, 均方根误差和平均偏差分别为0.26 m和0.00±0.26 m, 该结果表明本文使用的检验方法是科学合理的。本文对逐月的HY-2和Jason-2有效波高分别进行了检验, Jason-2有效波高的平均偏差任何时段均接近于零;在2013年4月以前, HY-2有效波高平均偏差不低于-0.31 m, 之后也接近于零。这些检验结果表明:HY-2高度计沿轨有效波高的检验统计结果是可靠的, 且过去3年的有效波高均为高质量数据;HY-2有效波高质量在2013年4月得到了改善且具有了和Jason-2相当的精度。HY-2卫星雷达高度计提供的有效波高产品是有效的且可用于业务化应用。
- 有效波高 /
- 真实性检验 /
- 中国HY-2卫星雷达高度计
Abstract: Chinese Haiyang-2(HY-2) satellite is the first Chinese marine dynamic environment satellite. The dual-frequency (Ku and C band) radar altimeter onboard HY-2 has been working effective to provide operational significant wave height (SWH) for more than three years (October 1, 2011 to present).We validated along-track Ku-band SWH data of HY-2 satellite against National Data Buoy Center (NDBC) in-situ measurements over a time period of three years from October 1, 2011 to September 30, 2014, the root mean square error (RMSE) and mean bias of HY-2 SWH is 0.38 m and (-0.13±0.35) m, respectively. We also did cross validation against Jason-2 altimeter SWH data,the RMSE and the mean bias is 0.36m and (-0.22±0.28) m, respectively. In order to compare the statistical results between HY-2 and Jason-2 satellite SWH data, we validated the Jason-2 satellite radar altimeter along-track Ku-band SWH data against NDBC measurements using the same method. The results demonstrate the validation method in this study is scientific and the RMSE and mean bias of Jason-2 SWH data is 0.26 m and (0.00±0.26) m, respectively. We also validated both HY-2 and Jason-2 SWH data every month, the mean bias of Jason-2 SWH data almost equaled to zero all the time, while the mean bias of HY-2 SWH data was no less than -0.31m before April 2013 and dropped to zero after that time. These results indicate that the statistical results for HY-2 altimeter SWH are reliable and HY-2 altimeter along-track SWH data were steady and of high quality in the last three years. The results also indicate that HY-2 SWH data have greatly been improved and have the same accuracy with Jason-2 SWH data after April, 2013. SWH data provided by HY-2 satellite radar altimeter are useful and acceptable for ocean operational applications.
- significant wave height /
- validation /
- Chinese HY-2 satellite radar altimeter

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参考文献(17)

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文章访问数: 1575
HTML全文浏览量: 72
PDF下载量: 1378
被引次数: 0

中国HY-2卫星雷达高度计有效波高真实性检验

doi: 10.1007/s13131-015-0667-y

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Validation of Chinese HY-2 satellite radar altimeter significant wave height

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