蒋春华,崔依琳,祝会忠,陈良,罗振宇

• 1:辽宁工程技术大学测绘与地理科学学院
• 2:山东大学空间科学与技术学院

摘要(Abstract)：

针对传统FY-4B卫星水汽反演方法精度不足、难以充分满足大气气候研究及短临降雨预报、极端天气预警需求，尤其无法为青藏高原地区提供全域不间断高精度水汽监测支持的问题，本文基于2023年全球卫星导航系统(GNSS)、探空和ERA5再分析数据，对FY-4B卫星携带的干涉式大气垂直探测仪(GIIRS)反演的大气可降水量(PWV)进行了系统评估。实验结果表明，FY-4B PWV与探空PWV具有较高的一致性，相关系数达0.88,与GNSS、探空、ERA5相比的RMS分别为2.57、3.71、4.28 mm, bias分别为0.16、—1.12、—2.43 mm。进一步分析空间分布特性表明，FY-4B PWV在青藏高原地区南部高海拔地区精度较低，北部和西部精度较高。季节性分析表明，FY-4B PWV在夏季RMS最大，春秋次之，冬季最小，呈现明显季节性变化。进一步建立FY-4B与GNSS的融合模型，经过模型校正，RMS提升了43%,有效减小了FY-4B PWV的误差。

关键词(KeyWords)： 风云4B;大气可降水量;GNSS;ERA5;无线电探空

Abstract:

Keywords:

基金项目(Foundation): 辽宁省“兴辽英才计划”项目(XLYC2203162);; 辽宁省自然科学基金联合项目(20240347,20240350);; 中国博士后科学基金项目(2025MD774095);; 自然资源部导航与位置服务重点实验室开放基金资助项目(2026NLBS0202)

作者(Author): 蒋春华,崔依琳,祝会忠,陈良,罗振宇

DOI: 10.16251/j.cnki.1009-2307.2026.11.003

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