中文摘要：

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7.0cm,数据精度满足设计精度要求。

英文摘要：

The HY-2Aradar altimeter effective measurements of the sea surface height（SSH）were selected using the IGDR editorial criteria.The crossover points of HY-2Asatellite SSH data from cycle 18 to 23and Jason-2data within 5days were determined.The erroneous measurement orbits were removed based on crossover statistics of HY-2Aand Jason-2.The quality of the HY-2ASSH data is evaluated using statistics of crossover difference analysis.The cross calibration results show that the number of HY-2Adata points removed by the editorial criteria is about 12% of the total HY-2ASSH observations.It is found in this study the standard deviation of SSH between HY-2Asatellite and Jason-2is 7.0cm for the HY-2Acycles used in this study,and the accuracy of SSH measurements of HY-2A meets the requirements of sensor design.