不同IGS星历产品对地基GPS反演水汽的影响  

Influence of different IGS ephemeris products on GPS of precipitable water vapor inversion

作　　者：刘盼 刘智敏[1] 张明敏 郭金运[1] LIU Pan;LIU Zhimin;ZHANG Mingmin;GUO Jinyun(College of Geomatics,Shandong University of Science and Technology,Qingdao,Shandong 266590,China)

机构地区：[1]山东科技大学测绘科学与工程学院

出　　处：《测绘科学》2018年第12期17-22,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41374009);青岛市博士后研究人员应用研究项目(2015186)

摘　　要：为了研究不同国际GNSS服务(IGS)星历产品对地基GPS反演可降水汽精度的影响,评估超快星历用于实时水汽反演的精度,该文借助Bernese5.2软件获取不同IGS星历产品解算的IGS跟踪站天顶总延迟,结合GPT2模型估算的气象参数反演得到大气可降水,最后与探空站资料计算的大气可降水进行对比分析。结果表明,利用超快速星历预报部分反演大气可降水结果的RMS在±8mm内波动,优于1cm,有助于实时探测大气可降水量的变化,进一步有效促进地基GPS在短临天气预报中的应用。In order to study the influence of different International GNSS Service(IGS)ephemeris products on perceptible water vapor(PWV)inversion and evaluation the accuracy of ultra-rapid ephemeris for real-time PWV inversion,using IGS station data and different IGS precision ephemeris,the total zenith tropospheric delay at the station was obtained with Bernese 5.2 in this paper.The meteorological parameters estimated by GPT2 model were used to inversion the PWV,and finally were compared with the Radio.The results showed that the RMS of PWV inversion using IGS ultra-rapid ephemeris prediction fluctuate within±8 mm,better than 1 cm,which helps to detect atmospheric precipitation in real time and further promote ground-based GPS for short-term impending weather forecast.

关 键 词：超快速星历 GPT2模型 Bernese5.2 天顶对流层延迟 大气可降水量 

分 类 号：P228.4[天文地球—大地测量学与测量工程]