| 一种改进的卫星高度计绝对定标方法:以中国黄海海上试验为例 |
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| 作者姓名： | LIU Yalong TANG Junwu ZHU Jianhu LIN Mingsen ZHAI Wanlin CHEN Chuntao |
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| 作者单位： | Ocean University of China, Qingdao 266100, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Ocean University of China, Qingdao 266100, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China |
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| 基金项目： | The Marine Public Welfare Projects of China under contract No. 201105032; the National High-Tech Project of China under contract No. 2008AA09A403. |
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| 摘 要： | An improved absolute calibration technology based on indirect measurements was developed through two probative experiments, the performance of which was evaluated by applying the approach to in situ sea surface height(SSH) at the Tianheng Island(tidal gauge) and the satellite nadir(GPS buoy). Using Geoid/MSS(mean sea surface) data, which accounted for a constant offset between nadir and onshore tidal gauge water levels, and TMD(tidal model driver), which canceled out the time-varying offsets, nadir SSH(sea surface height) could be indirectly acquired at an onshore tidal gauge instead of from direct offshore observation. The approach extrapolated the onshore SSH out to the offshore nadir with an accuracy of(1.88±0.20) cm and a standard deviation of 3.3 cm, which suggested that the approach presented was feasible in absolute altimeter calibration/validation(Cal/Val), and the approach enormously facilitated the obtaining SSH from the offshore nadir.
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| 关 键 词： | 卫星高度计 绝对校准 大地水准面 黄海 案例 中国 间接测量 GPS浮标 |
| 收稿时间： | 2013/4/16 0:00:00 |
| 修稿时间： | 2013/10/8 0:00:00 |
An improved method of absolute calibration to satellite altimeter: A case study in the Yellow Sea,China |
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| LIU Yalong,TANG Junwu,ZHU Jianhu,LIN Mingsen,ZHAI Wanlin,CHEN Chuntao.An improved method of absolute calibration to satellite altimeter: A case study in the Yellow Sea,China[J].Acta Oceanologica Sinica,2014,33(5):103-112. |
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| Authors: | LIU Yalong TANG Junwu ZHU Jianhu LIN Mingsen ZHAI Wanlin and CHEN Chuntao |
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| Institution: | Ocean University of China, Qingdao 266100, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;Ocean University of China, Qingdao 266100, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China;National Satellite Ocean Application Service, State Oceanic Administration, Beijing 100081, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China;National Ocean Technological Center, State Oceanic Administration, Tianjin 300112, China |
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| Abstract: | An improved absolute calibration technology based on indirect measurements was developed through two probative experiments, the performance of which was evaluated by applying the approach to in situ sea surface height (SSH) at the Tianheng Island (tidal gauge) and the satellite nadir (GPS buoy). Using Geoid/MSS (mean sea surface) data, which accounted for a constant offset between nadir and onshore tidal gauge water levels, and TMD (tidal model driver), which canceled out the time-varying offsets, nadir SSH (sea surface height) could be indirectly acquired at an onshore tidal gauge instead of from direct offshore observation. The approach extrapolated the onshore SSH out to the offshore nadir with an accuracy of (1.88±0.20) cm and a standard deviation of 3.3 cm, which suggested that the approach presented was feasible in absolute altimeter calibration/validation (Cal/Val), and the approach enormously facilitated the obtaining SSH from the offshore nadir. |
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| Keywords: | radar altimeter absolute calibration Yellow Sea |
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