Abstract:The annual period changes of zenith tropospheric delay for two years were calculated from the observations of 9 GPS continuously operating stations in Tianjin area as well as 4 IGS reference staions, and the timespace correlations of zenith tropospheric delay at different locations were analyzed. The results show that the mean values of differences among stations are about ±4 mm , the standard errors are better than 1cm; the mean values of differences between the data of 2006 and 2007 are about 9mm , the standard errors are better than 4cm.
Tang Chaohua,Li Tao,Shi Chuang et al. ANNUAL PERIOD CHANGES OF ZENITH TROPOSPHERIC DELAY OF CORS STATIONS IN TIANJIN DISTRICT[J]. jgg, 2009, 29(2): 106-110.