GPS水汽含量自动处理系统的研究及应用

Research and application on GPS water vapor auto processing system

随着北京全球定位系统（GPS）综合网的建设，以及地基GPS水汽反演技术的不断成熟，建立实时GPS数据下载和水汽自动处理系统．可提供气象科学研究所需的数据资料，为地基GPS气象学的业务化提供技术支持。本文介绍地基GPS反演水汽的基本原理及北京市GPS综合网的水汽含量自动处理系统，并利用该系统对2004年7月10日北京的一次强降水过程的大气水汽含量进行了反演。结果表明：在暴雨发生前3～4小时左右，GPS测量的气柱水汽含量在两小时内突增了6—7mm，很好地预示了其后的降水过程。可见该系统反演的全天候大气水汽场．可为准确监测和预报突发性强降水提供有意义的指标。

With the establishment of Beijing GPS network and the retrieval advancement of GPS/MET technology,we set up an auto-process system to download the GPS data and retrieve the Precipitable Water Vapor,which will be the great potential in weather forecast and application in numeric weather model.In this paper,we mainly introduce the construction of GPS water vapor auto-process system and the process which retrieve the atmospheric Precipitable Water Vapor.We also analyze the atmospheric Precipitable Water Vapor at Shijingshan and Daxing in July 10,2004.It suggests that the Water Vapor produced by this auto processing system can provide scientific reference for rainstorm monitoring and forecast.