| 京津冀地区FY-4A水汽校正模型研究CSCD |
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| 引用本文： | 王勇,姜诺涵,刘严萍,刘晓,占伟.京津冀地区FY-4A水汽校正模型研究CSCD[J].全球定位系统,2022,47(3):119-126. |
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| 作者姓名： | 王勇 姜诺涵 刘严萍 刘晓 占伟 |
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| 作者单位： | 1.天津城建大学 地质与测绘学院, 天津 300384 |
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| 基金项目： | 中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室开放基金资助项目(SKLGED-2021-2-4)；天津市科技计划项目(21KPHDRC00070)；天津市教委科研计划项目 (2021ZD001) |
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| 摘 要： | 融合全球卫星导航系统(GNSS)与风云气象卫星FY-4A可获得高精度高空间分辨率的水汽分布信息.利用中国大陆构造环境监测网络(CMONOC)提供的GNSS观测资料开展京津冀地区FY-4A水汽校正研究.首先对京津冀地区进行区域划分,按区域分季节开展GNSS水汽与FY-4A水汽的相关性分析;其次分区域、分季节选择不同的函数模型结合GNSS水汽资料构建FY-4A水汽校正模型;然后采取区域模型、单站点模型与实测GNSS水汽开展模型的可靠性检验;最后通过分区域FY-4A水汽校正和图像叠加,获得校正后的京津冀地区FY-4A水汽分布.研究表明:FY-4A水汽与GNSS水汽的相关性较好,区域FY-4A水汽校正模型精度与单站点模型精度相当,可取代单站点模型用于FY-4A的水汽校正.基于CMONOC的分区域函数模型在一定程度上提高FY-4A水汽精度,为短期天气预报和合成孔径雷达(InSAR)大气校正提供参考.
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| 关 键 词： | 中国大陆构造环境监测网络 全球卫星导航系统(GNSS) 风云气象卫星 水汽 校正模型 |
| 收稿时间： | 2021-09-26 |
Study on FY-4A PWV correction model in Beijing-Tianjin-Hebei region |
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| Affiliation: | 1.School of Geology and Geomatics, Tianjin Chengjian University, Tianjin 300384, China2.State Key Laboratory of Geodesy and Earth’s Dynamics, Innovation Academy for Precision Measurement Science and Technology, CAS, Wuhan 430077, China3.School of Economics and Management, Tianjin Chengjian University, Tianjin 300384, China4.The First Monitoring and Application Center, China Earthquake Administration, Tianjin 300180, China |
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| Abstract: | Integrating Global Navigation Satellite System (GNSS) and Fengyun meteorological satellite FY-4A can obtain high-precision and high-spatial resolution water vapor distribution information. This paper used the GNSS observation data from crustal movement observation network of China (CMONOC) to carry out the FY-4A water vapor correction study in the Beijing-Tianjin-Hebei region. Firstly, the Beijing-Tianjin-Hebei region was divided into four regions, and the correlation analysis between GNSS precipitable water vapor (PWV) and FY-4A PWV was carried out by regions and seasons. Secondly, different function models were selected by region and season and combined with GNSS PWV data to construct the FY-4A PWV correction models. Then, the GNSS PWV was compared with the results of the regional model and the single-site model respectively to carry out the reliability test of the model. Finally, the corrected FY-4A PWV distribution in the Beijing-Tianjin-Hebei region was obtained through regional FY-4A PWV correction and mosaiced. Research shows that the FY-4A PWV has a good correlation with GNSS PWV, and the accuracy of the regional FY-4A PWV correction model is equivalent to that of the single-site model, which can replace the single-site model for the FY-4A PWV correction. The regional model based on CMONOC GNSS PWV can improve the accuracy of FY-4A PWV to a certain extent, and provide references for the short-term weather forecast and InSAR atmospheric correction. |
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