Spatial And Temporal Analysis Of Precipitable Water Vapor And Rainfall By QDCORS

Precipitable water vapor is a major factor in the formation of precipitation,a Precipitable water vapor is important for the formation of rain.Due to the lack of the spatial and temporal resolution of conventional method of detecting PWV,which is seriously restricted to used.With the developed of GPS,used GPS to detect PWV is a powerful complement to conventional PWV detection methods.GPS technology has low cos,high spatial and temporal resolution,high precision,etc,and it has important significance in the analysis of PWV and rainfall precipitation,meteorological research.In this paper,Qingdao CORS data is used to study the PWV,and the inversion of atmospheric rainfall and rainfall is analyzed.The CORS data and corresponding meteorological data from eight stations in the Qingdao area from 2013 to 2015 were calculated by Brenese to obtain the spatial-temporal distribution characteristics of total zenith delay,static delay,and wet delay in the Qingdao area.When using the same set of meteorological data to calculate the static delay,the differences between the Saastamoinen model,the Hopfield model,and the Black model are compared and analyzed.When calculating the weighting mean temperature,the differences and applicability of the Bevis model,the model proposed by Li Jianguo et al.,and the Qingdao local model in Qingdao were compared.Wet precipitation and conversion parameters were used to obtain the PWV,and the radiosonde data was used to verify the precision of GPS inversion of PWV rainfall.By analyzing the changing characteristics of PWV,the relationship between the amount of rainfall and rainfall can be established,and rainfall can be predicted by using the invertible rainfall.Using a heavy rainfall process from September 29,2015 to October 2,2015,spatially analyzed the characteristics of the rainfall's changeable rainfall,and combined with the actual rainfall process,illustrated the ground-based GPS technology.Retrieving the PWV in heavy precipitation weather analysis and forecasting has certain reference value.