Tropospheric Zenith Delays Solved by GPS Data

The tropospheric zenith delays of Grw1 station in antarctic grouped with Peripheral IGS stations were respectively solved by GAMIT/GLOBK software using GPS observational data according to IGS final ephemeris and broadcasting ephemeris.The results show that the zenith delays of different stations solved by the two kinds of ephemeris data at the same time are almost same.The differential minmum was 0 mm and the differential maximum was 0.5 mm.Therefore,broadcasting ephemeris in this software can be used to solve the zenith delays which are premise of caculating the precipitable water vapor contents on the GPS stations.It is a useful significance for real-time water vapor contents detection and weather forecast.