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

YE Xiaomin; LIN Mingsen; XU Ying

doi:10.1007/s13131-015-0667-y

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Article Navigation > Acta Oceanologica Sinica > 2015 > 34(5): 60-67

YE Xiaomin, LIN Mingsen, XU Ying. Validation of Chinese HY-2 satellite radar altimeter significant wave height[J]. Acta Oceanologica Sinica, 2015, 34(5): 60-67. doi: 10.1007/s13131-015-0667-y

Citation:

YE Xiaomin, LIN Mingsen, XU Ying. Validation of Chinese HY-2 satellite radar altimeter significant wave height[J]. Acta Oceanologica Sinica, 2015, 34(5): 60-67. doi: 10.1007/s13131-015-0667-y

YE Xiaomin, LIN Mingsen, XU Ying. Validation of Chinese HY-2 satellite radar altimeter significant wave height[J]. Acta Oceanologica Sinica, 2015, 34(5): 60-67. doi: 10.1007/s13131-015-0667-y

Citation:

YE Xiaomin, LIN Mingsen, XU Ying. Validation of Chinese HY-2 satellite radar altimeter significant wave height[J]. Acta Oceanologica Sinica, 2015, 34(5): 60-67. doi: 10.1007/s13131-015-0667-y

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

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

Received Date: 2014-11-27
Rev Recd Date: 2015-01-29

Abstract

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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References(17)

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