Abstract:The regional model of zenith tropospheric delay and precipitable water vapor can help to solve the problem of calculating precipitable water vapor when pressure and temperature data are not available. In this paper, we carry out the correlation analysis of zenith tropospheric delay and precipitable water vapor by the Taiwan Taoyuan (TWTF) station meteorological and zenith tropospheric delay data. Results show there is a significant positive correlation between the two.Further, the seasonal and annual transformation models are established using regression analysis, and seasonal precipitation and non-precipitation data are used to verify the conversion model. The RMS value of GNSS-PWV and linear regression-PWV is less than 1.5 mm, and the maximum error is not more than 3.3 mm. This model is proven to meet the basic requirements of GNSS meteorology.
YI Zhenghui,WANG Shuaimin,WANG Yong et al. Research on Seasonal Transition Model of GNSS Zenith Tropospheric Delay Calculating Precipitable Water Vapor[J]. jgg, 2017, 37(8): 830-834.