Abstract:We propose a PWV estimation model considering the water vapor attenuation factor, and obtain the PWV by inputting the surface atmospheric water vapor pressure and the water vapor attenuation factor. We use the 1a observation data of 85 radiosonde stations and 7 IGS stations in China in 2018 to verify the accuracy of the new model. The results show that when there is a water vapor attenuation factor of the day, the model’s estimated PWV accuracy is about 2 mm; the water vapor attenuation factor at any position can also be obtained through GPT2w grid interpolation. The accuracy is equivalent to that of the traditional first-order polynomial model, but the newmodel has a wider range of action and stronger applicability.
TONG Mengxiang,YU Sanda,XIA Pengfei et al. Analysis of Atmospheric Precipitable Water Vapor Model in China with Water Vapor Decrease Factor[J]. jgg, 2022, 42(7): 745-749.