基于反投影方法的对流层延迟三维层析研究

RESEARCH ON 3D TROPOSHPERIC DELAY TOMOGRAPHY BASED ON BACK-PROJECTION METHOD

利用GAMIT/GLOBK软件解算美国地基GPS监测网数据,获得天顶对流层总延迟,并基于反投影方法虚拟对流层斜路径总延迟量,解算了对流层延迟密度。运用层析技术分析该地区对流层延迟三维特征,结果表明,反投影方法估算的天顶对流层总延迟与GAMIT解算的结果相差很小,最大残差小于5 mm,中误差为4.1 mm。

Tropospheric delay density is resolved with the ground-based GPS monitoring network data in USA solved by the GAMIT/GLOBK software based on tropospheric slant path total delay virtualized by back-projection method. Tropospheric delay 3D feature is analyzed by the method of tomography. The result shows that zenith total delay solved by two methods is small, the maximum error is less than 5 mm, and the mean square is 4.1 ram.