成都地区地基GPS观测网遥感大气可降水量的初步试验  

Experiment on Driving Precipitable Water Vapor from Ground-Based GPS Network in Chengdu Plain

作　　者：李国平[1] 黄丁发[1] 刘碧全 

机构地区：[1]西南交通大学地理空间信息工程中心 [2]成都市气象局,成都市大石东路1号610071

出　　处：《武汉大学学报（信息科学版）》2006年第12期1086-1089,共4页Geomatics and Information Science of Wuhan University

基　　金：国家973计划资助项目(2004CB418300);国家自然科学基金资助项目(40375023);西南交通大学博士生创新基金资助项目

摘　　要：利用首个成都地区地基GPS观测网2004年7～9月30s间隔的测量数据，通过Bernese GPS SoftwareV4．2解算出30min间隔的天顶总延迟量，结合自动气象站获得的气象资料计算出30min间隔的GPS遥感的大气可降水量。与根据气象探空站探测资料算出的可降水量进行统计对比，确定出本次GPS遥感可降水量试验的精度为3．09mm，两种可降水量时间序列呈现高度的一致性。同时验证了计算对流层加权平均温度的Bevis经验公式在成都地区的适用性。The estimates of total zenith delay are available using Bernese GPS Software V4.2 based on GPS data every 30 s from the first measurement experiment of a ground-based GPS network in Chengdu Plain of Southwest China during the period of July to September 2004. Then estimates of 0.5 hourly precipitable water vapor （PWV） derived from global positioning system （GPS） are obtained using meteorological data from automatic weather stations. The comparison of precipitable water vapor derived from GPS and those from radiosonde observations is given at Chengdu station, with RMS （root mean square） differences of 3.09 ram. The consistency of precipitable water vapor derived from GPS to those from radiosonde is very good. It is concluded that Bevis empirical formula for estimating the weighted atmos pheric mean temperature can be applicable in Chengdu areas because the relationship of GPS PWV with Bevis＇ formula between GPS PWV with radiosonde method shows a high correlation. The results of this GPS measurement experiment are helpful both for accumulating the study of precipitable water vapor derived from GPS in Chengdu areas located at the eastern flank of the Tibetan Plateau and for studying spatial-temporal variations of regional atmos pheric water vapor through many disciplines cooperatively.

关 键 词：可降水量 GPS 遥感 

分 类 号：P228.42[天文地球—大地测量学与测量工程]