基于水汽辐射计与GPS湿延迟的对比研究

COMPARISON BETWEEN ZENITH WET DELAY BY WATER VAPOR RADIOMETER AND GPS

利用事后精密星历和快速预报星历分别解算GPS对流层延迟,由Saastamoinen模型求得对流层干延迟,对流层湿延迟为对流层延迟与干延迟的差值。精密星历与快速预报星历的GPS湿延迟结果和水汽辐射计观测数据比较,得出精密星历湿延迟结果与水汽辐射计数据的差值的均方根为1.51cm;快速预报星历湿延迟与水汽辐射计数据的差值的均方根为1.52cm。

The zenith troposphere delay by use of final ephemeris and ultra-rapid ephemeris and computes the zenith dry delay with the Saastamoinen model. The difference between zenith troposphere delay and zenith dry delay is the zenith wet delay. Through the comparison of the observations by WVR with that by GPS we conclude that the mean square root with final ephemeris reaches 1.51 cm and the mean square root with ultra-rapid ephemeris reaches 1.52 cm.