地基GPS技术在广东区域水汽分布研究中的应用

Analysis on the Distribution of Atmospheric Precipitable Water by Ground-based GPS

利用广东省连续运行卫星定位服务系统(GDCORS)观测资料,采用地基GPS/MET技术线路,用Bernese软件平台求解各参考站上的对流层天顶总延迟和湿延迟。通过推导湿延迟与大气可降水汽含量之间的转换关系得到GPS各测站大气水汽含量。试验结果表明,GPS/MET技术可获得覆盖广东省范围的高时空分辨率的大气水汽总含量分布图。

Data from Guangdong Continuously Operating Reference Stations （GDCORS） are used to calculate the tropospheric delay and wet delay above each GPS reference station. The software Bernese V4.2 is used to deduce the precipitable water vapor （PWV） based on the relation between the ZWD （Zenith Wet Delay） parameters and the PWV. Experiments show that high temporal -spatial resolution PWV coverage can be retrieved by GPS/MET algorithm, which shows practical usefulness in monitoring water vapor variance over Guangdong province.