Estimation of Water Vapor Distribution Using Combined Data from GMS-5 and Ground Stations
用GMS-5卫星资料结合地面资料联合估算水汽分布

In this paper, the GMS-5 data at channels of infrared split windows and water vapor are applied, accompanied by radiosonde data, to retrieve water vapor distribution under cloud-free condition. Meanwhile the radiosonde data are used to build empirical relationship among the surface water vapor pressure, the surface relative humidity, and the total water vapor content, and then the coefficient matrix for the empirical formulas at more than 300 ground stations in the HUBEX area is derived by interpolation with weight, which made it possible to estimate water vapor distribution by ground station data under cloudy condition. The two methods are finally collaborated to obtain the water vapor distribution under all-weather condition in the HUBEX area.