| FY-3C无线电掩星折射率廓线的反演及验证 |
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| 引用本文： | 徐晓华,张纪满,罗佳,高攀.FY-3C无线电掩星折射率廓线的反演及验证[J].武汉大学学报(信息科学版),2022,47(1):36-44. |
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| 作者姓名： | 徐晓华 张纪满 罗佳 高攀 |
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| 作者单位： | 1.武汉大学测绘学院，湖北 武汉，430079 |
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| 基金项目： | 国家自然科学基金41774033国家自然科学基金41774032国家重点研发计划2018YFC1503502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18-02-10重庆市基础研究与前沿探索专项cstc2018jcyjAX0015 |
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| 摘 要： | 2013年,中国发射了首颗进行全球导航卫星系统(global navigation satellite system,GNSS)无线电掩星观测的气象卫星FY-3C,其掩星数据产品已由国家卫星气象中心(national satellite meteorological center,NSMC)发布.基于FY-3C附加相位...
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| 关 键 词： | FY-3C GNSS掩星 折射率廓线 全谱反演 |
| 收稿时间： | 2019-12-10 |
Retrieval and Validation of FY-3C Radio Occultation Refractivities |
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| Institution: | 1.School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China2.Collaborative Innovation Center for Geospatial Technology, Wuhan 430079, China3.Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China4.Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China |
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| Abstract: | Objectives In 2013, the first meteorological satellite of China with global navigation satellite system (GNSS) radio occultation (RO) observation capability, FY-3C, was launched, and FY-3C RO products have been released by the National Satellite Meteorological Center (NSMC). Methods In the present study, the RO refractivity profiles are retrieved from FY-3C excess phase data during the whole year of 2017 by combing the geometric optical inversion and the full spectrum inversion (FSI) algorithms, and the quality of the retrieved refractivity profiles are evaluated with NSMC products and ERA-Interim reanalysis data. Results The success rate of our retrieval process is 82%, which is basically consistent with that of NSMC's 83.5%. With ERA-Interim reanalysis data as references, the relative biases (RBs) of the inverted refractivities are smaller than 1.5% below 25 km, which are slightly better than those of the NSMC refractivity products. While the standard deviations of the relative biases (SDRBs) of the inverted refractivities reach 3.6%, which are larger than those of the NSMC refractivity products. Conclusions Compared with ERA-Interim reanalysis data, the RBs and the SDRBs of the inverted refractivities and NSMC products are significantly lower at high latitudes than those at middle and low latitudes, and the RBs of the inverted refractivities are generally larger in summer than in winter. |
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