HY-2A卫星雷达高度计数据的全球统计评价及质量分析
Global statistical evaluation and performance analysis of HY-2A satellite radar altimeter data
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摘要: 自HY-2A卫星发射以来,针对HY-2A卫星雷达高度计产品的交叉定标、真实性检验及质量评估工作一直在持续开展.本文主要以HY-2A卫星高度计第44周期的IGDR产品数据为例,通过使用全球分布图、二维直方图和每日均值统计的方法完成了与Jason-2 IGDR产品的比对验证,同时对主要环境校正参数及地球物理产品的数据质量稳定性进行了分析,结果显示高度计产品数据质量较稳定,此外利用HY-2A卫星升降轨交叉点海面高度差、与Jason-2卫星交叉点海面高度差以及沿轨海平面异常数据分析的方法进行了HY-2A卫星高度计观测系统的性能评估,结果显示,HY-2A卫星海面高度精度约为7.48 cm,精度接近Jason-2,能满足海洋应用与科学研究的需要.Abstract: Since the satellite launched,the cross-calibration,validation and quality assessment for HY-2A satellite radar altimeter product have been ongoing. In this paper,we finish the verification work that HY-2A satellite altimeter 44th cycle IGDR product data was compared with Jason-2 IGDR through global distribution,two-dimensional histogram and the daily average methods. While the main environmental parameters and geophysical product data quality analysis showed that data quality are stable. In addition,the analysis of the SSH differences at crossovers between HY-2A ascending and descending tracks,the SSH differences at HY-2A and Jason-2 and sea Level Anomaly (SLA) along track have been done to evaluate performance of HY-2A satellite altimeter observation system,the results showed that sea surface height accuracy is about 7.48 cm,close to Jason-2. It can meet the needs of marine applications and scientific research.
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Key words:
- HY-2A /
- altimeter /
- global statistic /
- sea level abnormal /
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