摘要
针对水汽辐射计观测数据和并址的GPS观测数据,用GAMIT软件求解了台站的天顶总延迟和湿项延迟。运用湿项延迟与水汽含量之间的转换关系,对GPS监测的大气可降水量与水汽辐射计观测的水汽含量进行了对比研究,得出结果:由GAMIT解算出的水汽含量与WVR观测值的差值平均值为0.02 mm,均方差为0.02 mm,由气象文件求出的水汽含量与WVR观测值的差值平均值为0.03 mm,均方差为0.02 mm。表明用地面GPS监测大气水汽含量是完全可行的。
This paper analyzes the precipitable water vapor value calculated from GPS data and observed by WVR （Water Vapor Radiometer）. Using GAMIT,we have calculated the tropospheric delay and obtained the wet zenith delays over the station. Following the discussed relation between wet zenith delay parameters and precipitable water vapor, we have calculated the precipitable water vapor over the area. Comparing it with what is observed by WVR,we get the result that the average diffrence is 0.02 mm with RMS of 0.02 mm. At the same time,we have calculated the precipitable water vapor using the weather observations on ground. It shows that the average diffrence is 0.03 mm with RMS of 0.02 mm. So with the ground-based GPS, we can monitor the precipitable water vapor continuously and effectively.
出处
《大地测量与地球动力学》
CSCD
北大核心
2005年第3期125-128,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金重点项目(40234039)
关键词
水汽辐射计
天顶总延迟
湿项延迟
可降水量
GPS数据
water vapor radiometer, tropospheric delay, wet zenith delay, precipitable water vapor, GPS data
