| YE Xiaomin,LIN Mingsen,XU Ying. 2015. Validation of Chinese HY-2 satellite radar altimeter significant wave height. Acta Oceanologica Sinica, 34(5):60－67 |
| Validation of Chinese HY-2 satellite radar altimeter significant wave height |
| 中国HY-2卫星雷达高度计有效波高真实性检验 |
| Received:November 27, 2014 Revised:January 29, 2015 |
| DOI：10.1007/s13131-015-0667-y |
| Key words:significant wave height validation Chinese HY-2 satellite radar altimeter |
| 中文关键词: 有效波高 真实性检验 中国HY-2卫星雷达高度计 |
| 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. |
| Author Name | Affiliation | E-mail | | YE Xiaomin | 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 | | | LIN Mingsen | 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 | mslin@mail.nsoas.org.cn | | XU Ying | 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 | |
|
| Hits: 2324 |
| Download times: 2026 |
| 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. |
| 中文摘要: |
| 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。 |
|
HTML
View Full Text
View/Add Comment Download reader |
| Close |
|
|
|
