| HY-2C卫星海面高度数据的质量分析 |
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| 引用本文： | 孟菊,于方杰,庄志远,齐娟娟,陈戈.HY-2C卫星海面高度数据的质量分析[J].海洋学报,2022,44(10):173-181. |
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| 作者姓名： | 孟菊 于方杰 庄志远 齐娟娟 陈戈 |
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| 作者单位： | 1.中国海洋大学 信息科学与工程学部 海洋技术学院，山东 青岛 266100 |
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| 基金项目： | “观澜二号”（GL-2）敏捷编队高度计小卫星工程项目（2021WHZZB1602）；“观澜号”海洋科学卫星校飞试验项目（2021WHZZB1705）；基于人工智能的孪生海洋关键技术与应用示范项目（2022QNLM050301-4）。 |
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| 摘 要： | 卫星海面高度数据对于监测全球海面高度具有重要的意义，所以卫星高度数据的定标和检验变得至关重要。海洋二号C（HY-2C）卫星是继海洋二号B卫星后的第二颗业务卫星，于2020年成功发射升空。然而，目前对HY-2C卫星高度计的数据质量了解甚少，所以对HY-2C卫星的海面高度数据进行质量分析具有重要的意义。本文以同期观测的HY-2B卫星和Jason-3卫星的地球物理数据（GDR）为参考，对HY-2C卫星遥感地球物理数据（SGDR）中的海面高度数据进行质量分析。结果显示，在星星交叉定标中使用3种常见的交叉定标插值方法对HY-2C卫星的海面高度异常数据进行自交叉点分析时，HY-2C卫星海面高度异常数据质量分析的结果不同。其中使用三次样条插值方法进行质量分析的结果最优，得到海平面高度异常差的平均值为0.03 cm，标准差为6.17 cm。此外，对HY-2C卫星和HY-2B卫星互交叉点海面高度异常差异的平均值为?0.47 cm，标准差为5.32 cm；HY-2C卫星SGDR与Jason-3卫星GDR的海面高度异常数据进行互交叉点分析，得到海平面高度异常差的平均值为?0.3 cm，标准差为5.32 cm，这些数据表明HY-2C卫星的测高精度与HY-2B卫星、Jason-3卫星一致。因此HY-2C高度计产品数据质量稳定，能满足海洋应用和科学研究的需要。
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| 关 键 词： | HY-2C卫星 高度计 海面高度 交叉点分析 |
| 收稿时间： | 2022-05-04 |
Quality analysis of sea level height data of HY-2C satellite |
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| Institution: | 1.Department of Marine Technology, Faculty of Information Science and Engineering, Ocean University of China, Qingdao 266100, China2.Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China |
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| Abstract: | As an important part of monitoring oceanic phenomenon, it is essential to calibrate altimeter sea level height data. In 2020, the Haiyang-2C (HY-2C) satellite was sent to orbit as a follow-up mission of the HY-2B satellite. However, the quality of HY-2C sea level height is not fully known yet. In this paper, the quality and accuracy of HY-2C sensor geophysical data records (SGDR) of the latest version were assessed through the comparison with the HY-2B geophysical data records (GDR) and Jason-3 GDR measured at the same time. According to the results: self-crossover points analysis is carried out by star cross calibration of HY-2C satellite. The quality analysis results of sea level anomaly data of HY-2C SGDR are different. Through the comparison results, the optimal cubic spline interpolation method has the best quality analysis performance, with mean value is 0.03 cm and the standard deviation is 6.17 cm. The mean and standard deviation of sea level anomaly at the dual-crossing calibration of HY-2C and HY-2B satellites are ?0.47 cm and 5.32 cm. The mean and standard deviation of sea level anomaly at the intersection of HY-2C and Jason-3 satellites are ?0.3 cm and 5.32 cm. These results show that HY-2C has the same precision as HY-2B satellite and Jason-3 satellite. Data quality of HY-2C satellite is enough to meet the requirements of marine scientific research and application. |
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