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| COSMIC-2掩星反演数据质量分析 |
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薛子悦1,2, 鲍艳松1,2, 唐歌实3, 成巍4, 朱孟斌4, 袁帅3
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1. 南京信息工程大学气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室/气象环境卫星工程与应用联合实验室，江苏 南京 210044;2. 南京信息工程大学大气物理学院，江苏 南京 210044;3.南京信息工程大学，江苏 南京 210044;4.北京应用气象研究所，北京 100029
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| 摘要: |
| 为评价COSMIC-2掩星反演数据精度，利用探空站点资料，对比验证了基于COSMIC-2附加相位数据由无线电掩星数据处理软件ROPP计算得到的大气折射率及温湿廓线。实验结果表明：COSMIC-2数据经反演后的大气廓线质量较高，大气折射率相对偏差标准差为1.5%～4.3%，大气温度和相对湿度均方根误差分别为1.3～2.2 K、10%～15%；低纬地区样本精度总体优于中纬地区；季节性差异不明显，但冬春季样本精度总体略优于夏秋季。反演数据与COSMIC-2二级产品相比，折射率与温度在部分高度层精度更优，相对湿度在总体上精度更优。 |
| 关键词: COSMIC-2 GNSS掩星反演 ROPP 大气廓线 质量分析 |
| DOI：Doi：10.16032/j.issn.1004-4965.2022.041 |
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| QUALITY ANALYSIS OF COSMIC-2 RADIO OCCULTATION RETRIEVAL DATA |
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XUE Ziyue1,2, BAO Yansong1,2, TANG Geshi3, CHENG Wei4, ZHU Mengbin4, YUAN Shuai3
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1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/ Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration/ Joint Laboratory of Meteorological Environment Satellite Engineering and Application, Nanjing University of Information Science & Technology, Nanjing 210044, China;2. School of Atmospheric Physics, Nanjing University of Information Science & Technology, Nanjing 210044, China;3.Nanjing University of Information Science & Technology, Nanjing 210044, China;4.Beijing Institute of Applied Meteorology, Beijing 100029, China
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| Abstract: |
| To evaluate the precision of COSMIC-2 radio occultation (RO) retrieval data, we compared and verified the atmospheric refractivity, temperature and relative humidity profiles calculated by the Radio Occultation Processing Package based on the COSMIC-2 excess phase data. The results are evaluated with the radiosonde data. The experimental results show that the atmospheric profiles retrieved from COSMIC-2 data have high precision, in which standard deviations of relative biases of atmospheric refractivity are 1.5%~4.3%, and root mean squared errors of atmospheric temperature and relative humidity are 1.3 ~ 2.2 K and 10%~15%, respectively. The precision of samples in low latitude area is better than that in middle latitude area. The seasonal difference is not obvious, but the sample precision in winter and spring is slightly better than that in summer and autumn. Compared with the wetPf2 products of COSMIC-2, the precision of retrieved refractivity and temperature in some height layers is better, and the precision of retrieved relative humidity in general is better. |
| Key words: COSMIC-2 GNSS occultation retrieval Radio Occultation Processing Package atmospheric profile quality analysis |