| 基于再分析资料ERA5的对流层延迟估计方法及精度评估 |
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| 引用本文： | 张永林,蔡昌盛.基于再分析资料ERA5的对流层延迟估计方法及精度评估[J].大地测量与地球动力学,2020,40(1):62-65. |
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| 作者姓名： | 张永林 蔡昌盛 |
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| 作者单位： | 中南大学地球科学与信息物理学院 |
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| 基金项目： | 国家重点研发计划(2016YFB0501803);国家自然科学基金(41674039);中南大学创新创业师生共创项目(2018gczd005)~~ |
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| 摘 要： | 提出基于再分析资料ERA5的天顶对流层延迟计算方法,使用中国大陆构造环境监测网络提供的26个GNSS测站2017年全年数据,评估由该方法计算的天顶对流层延迟的精度,并与前一代再分析资料ERA-Interim的计算结果进行对比分析。结果显示,ERA5计算的天顶对流层延迟均方根误差比ERA-Interim计算结果低,表明新一代产品的精度有明显提升。
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| 关 键 词： | 全球导航卫星系统 ERA5 ERA-INTERIM 天顶对流层延迟 中国大陆构造环境监测网络 |
Method and Accuracy Assessment of Zenith Tropospheric Delay Derived from ERA5 Re-Analysis Data |
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| ZHANG Yonglin,CAI Changsheng.Method and Accuracy Assessment of Zenith Tropospheric Delay Derived from ERA5 Re-Analysis Data[J].Journal of Geodesy and Geodynamics,2020,40(1):62-65. |
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| Authors: | ZHANG Yonglin CAI Changsheng |
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| Institution: | (School of Geosciences and Info-Physics,Central South University,932 South-Lushan Road,Changsha 410083,China) |
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| Abstract: | In this paper, we present the method of calculating zenith tropospheric delay (ZTD) from ERA5. Then the accuracy of the ZTD derived from ERA5 is evaluated using GNSS data during the entire year of 2017 with a comparison to ERA-Interim. The GNSS-derived ZTD is obtained at 26 stations in crustal movement observation network of China (CMONOC). Statistics show that the root mean square (RMS) of ZTD calculated by ERA5 is lower than ERA-Interim, indicating that the ERA5 has an obvious accuracy improvement over the ERA-Interim. |
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| Keywords: | GNSS ERA5 ERA-Interim zenith tropospheric delay CMONOC |
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