GPS water vapour estimation using meteorological data from Chinese Antarctic research stations

This paper mainly discusses the research deducing atmospheric Precipitable Water Vapor (PWV) from tropospheric zenith wet delay using ground-based GPS receivers. China GreatWall and ZhongShan stations in Antarctica were taken as the researching sites. The data from SCAR Antarctic GPS Campaigns Epoch 1998/1999/2000 are used to construct the GPS analytical networks. A high-accuracy GPS processing software package-GAMIT/GLOBK is utilized; Multiple schemes are adopted. Two kinds of models, Saastamonien and Hopfield, are used to calculate the zenith hydrostatic delay. Before calculating the atmospheric Precipitable Water Vapor (PWV), we firstly use the long-term meteorological data of the two stations to calculate the conversion ratio-K, which is accommodated with the time period January and February of the two stations. After that wet zenith delay are transferred into PWV. In situ observed rainfall are combined to analyzing. Good results are achieved for all sessions and both stations.