| 侯恺昕,张胜军,孔祥雪.基于验潮站资料的HY-2A测高数据质量评定[J].海洋学报,2019,41(7):136-142 |
| 基于验潮站资料的HY-2A测高数据质量评定 |
| Quality assessment of HY-2A altimeter data through tide gauge comparisons |
| 投稿时间：2018-08-02 修订日期：2018-12-10 |
| DOI：10.3969/j.issn.0253-4193.2019.07.012 |
| 中文关键词: 海洋二号 卫星测高 验潮站 质量评价 |
| 英文关键词:HY-2A satellite altimetry tide gauges quality assessment |
| 基金项目:国家自然科学基金（41804002）；中央高校基本科研业务专项资金资助项目（N170103009）；武汉大学地球空间环境与大地测量教育部重点实验室开放基金（17-01-04）。 |
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| 中文摘要: |
| 验潮站资料为评定卫星测高海面高度观测值的精度提供了有效途径。基于数据编辑准则筛选出HY-2A数据，通过引入NCEP实时大气压模型，解决了HY-2A卫星任务后期测高数据产品中部分干对流层延迟项和大气逆压校正项不可用的问题。在此基础上，将HY-2A海面高观测值与验潮站数据进行时空匹配，在选取的9个站点上进行了相关系数和标准差计算。结果表明，两者相关系数平均约为0.676 9，最优可达0.898 7，平均标准差为0.089 5 m。整体验证结果表明，HY-2A卫星测高数据质量符合设计指标，达到预期水平，为海洋重力场反演等应用研究提供了新的可靠数据源。 |
| 英文摘要: |
| The tide gauge data provide an effective way to evaluate the accuracy of satellite altimeter data. The HY-2A data are filtered based on the data edited criterion and the model of real-time atmospheric pressure provided by NCEP are used to solve the problem caused by the unavailable dry tropospheric correction and inverse barometer correction in the later stage of the HY-2A exact repeat mission (ERM). By matching the HY-2A altimeter data and the tide gauges data in temporal and spatial, the correlation coefficient and standard deviation between the two kinds of altimeter data are calculated in the nine selected tide gauges area. According to the analysis results, the average correlation coefficient is about 0.676 9, the optimum is up to 0.898 7, and the average standard deviation is 0.089 5 m. The results show that the quality of HY-2A satellite altimetry data meet the design target and achieve the expected level. It provides a new reliable data source for the application research of the marine gravity field inversion. |
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