Calibration of HY-2A satellite significant wave heights with in situ observation

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• 作者：Hailong Peng ; Mingsen Lin
• 关键词：total least squares ; NDBC buoys ; HY ; 2A altimeter ; significant wave height
• 刊名：Acta Oceanologica Sinica
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：35
• 期：3
• 页码：79-83
• 全文大小：1,567 KB
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• 作者单位：Hailong Peng (1) (2) (3)
  Mingsen Lin (2) (3)
  
  1. College of Information Science and Engineering, Ocean University of China, Qingdao, 266100, China
  2. Nation Satellite Ocean Application Service, State Oceanic Administration, Beijing, 100081, China
  3. Key Laboratory of Space Ocean Remote Sensing and Application, State Oceanic Administration, Beijing, 100081, China
  
• 刊物主题：Oceanography; Climatology; Ecology; Engineering Fluid Dynamics; Marine & Freshwater Sciences; Environmental Chemistry;
• 出版者：Springer Berlin Heidelberg
• ISSN：1869-1099

文摘

Significant wave height (SWH) can be computed from the returning waveform of radar altimeter, this parameter is only raw estimates if it does not calibrate. But accurate calibration is important for all applications, especially for climate studies. HY-2a altimeter has been operational since April 2012 and its products are available to the scientific community. In this work, SWH data from HY-2A altimeters are calibrated against in situ buoy data from the National Data Buoy Center (NDBC), Distinguished from previous calibration studies which generally regarded buoy data as “truth”, the work of calibration for HY-2A altimeter wave data against in situ buoys was applied a more sophisticated statistical technique—the total least squares (TLS) method which can take into account errors in both variables. We present calibration results for HY-2A radar altimeter measurement of wave height against NDBC buoys. In addition, cross-calibration for HY-2A and Jason-2 wave data are talked over and the result is given.