南昌地区地基GPS水汽反演中区域加权平均温度模型  

Modaling of regional weighted mean temperature of ground-based GPS water vapor retrieval in nanchang area

作　　者：罗桢[1] 吴良才[2] 

机构地区：[1]东华理工大学测绘工程学院,江西南昌330013 [2]流域生态与地理环境监测国家测绘地理信息局重点实验室,江西南昌330013

出　　处：《南昌大学学报（理科版）》2016年第3期264-268,共5页Journal of Nanchang University(Natural Science)

基　　金：江西省研究生创新教育基地项目(2310700008)

摘　　要：在GPS气象学中,加权平均温度Tm作为可降水量解算中的一个参数,对可降水量解算精度的影响有着重大的作用,利用南昌探空站2011~2015年的探空数据分析了南昌地区加权平均温度的时空特性及其与地表温度的关系,并通过线性回归的方法得到了该地区加权平均温度模型,并对目前可用的经验模型的适用性进行了分析,结果表明,基于南昌探空站资料建立的加权平均温度区域模型,其适用性最优,对PWV的解算精度影响最小。In GPS/MET,weighted mean temperature is an parameter which have a great influence in calculation precision of precipitable water vapor.Based on the data of 2011-2015 of Nanchang radiosonde station,analyzed the spatial-temporal characteristics of the regional weighted mean temperature,as well as its function relation with ground temperature,and then established a modal which was applied to the calculation of regional weighted mean temperature by linear regression.In order to choose a best modal for Nanchang area,compared the modal which was established in aforementioned sounding station data with currently useful modals.It turned out that the former had a best applicability and lowest influence in calculation precision of PWV.

关 键 词：GPS气象学 加权平均温度 探空资料 线性回归 

分 类 号：P2[天文地球—测绘科学与技术]