| HY-2A卫星海面高度数据质量评估 |
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| 引用本文： | 杨光,宋清涛,蒋兴伟,王兆徽.HY-2A卫星海面高度数据质量评估[J].海洋学报,2016,38(11):90-96. |
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| 作者姓名： | 杨光 宋清涛 蒋兴伟 王兆徽 |
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| 作者单位： | 国家卫星海洋应用中心, 北京 100081;国家海洋局空间海洋遥感与应用研究重点实验室, 北京 100081 |
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| 基金项目： | 基金面上项目（41276019）；海洋公益性行业科研专项（201305032）；广东省科技计划项目（20BB020200013）。 |
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| 摘 要： | 对HY-2A卫星雷达高度计数据进行筛选获取有效的观测点，利用HY-2A卫星第18~23周期数据和同时在轨的Jason-2数据进行交叉点选取，对两颗卫星在交叉点海面高度异常值的差值进行统计与分析，提出了基于交叉点差值统计特征的筛除HY-2A轨道数据方法，评估了HY-2A卫星雷达高度数据质量。结果显示，HY-2A卫星18~23周期阈值筛选去除的点个数占总海洋观测点约12%，HY-2A海面高度异常与Jason-2海面高度异常的标准偏差在7.0 cm，数据精度满足设计精度要求。
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| 关 键 词： | HY-2A 雷达高度计 海面高度 HY-2A质量评估 |
| 收稿时间： | 2015/5/16 0:00:00 |
| 修稿时间： | 9/5/2015 12:00:00 AM |
Preliminary assessment of the quality of HY-2A satellite sea surface height data |
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| Yang Guang,Song Qingtao,Jiang Xinwei and Wang Zhaohui.Preliminary assessment of the quality of HY-2A satellite sea surface height data[J].Acta Oceanologica Sinica (in Chinese),2016,38(11):90-96. |
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| Authors: | Yang Guang Song Qingtao Jiang Xinwei and Wang Zhaohui |
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| Affiliation: | National Satellite Ocean Application Service, Beijing 100081, China;Key Laboratory of Ocean Space Remote Sensing and Application, State Oceanic Administration, Beijing 100081, China |
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| Abstract: | The HY-2A radar altimeter effective measurements of the sea surface height (SSH) were selected using the IGDR editorial criteria. The crossover points of HY-2A satellite SSH data from cycle 18 to 23 and Jason-2 data within 5 days were determined. The erroneous measurement orbits were removed based on crossover statistics of HY-2A and Jason-2. The quality of the HY-2A SSH data is evaluated using statistics of crossover difference analysis. The cross calibration results show that the number of HY-2A data points removed by the editorial criteria is about 12% of the total HY-2A SSH observations. It is found in this study the standard deviation of SSH between HY-2A satellite and Jason-2 is 7.0 cm for the HY-2A cycles used in this study, and the accuracy of SSH measurements of HY-2A meets the requirements of sensor design. |
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| Keywords: | HY-2A radar altimeter sea surface height HY-2A quality assessment |
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