GPS meteorology: validation and comparisons with ground-based microwave radiometer and mesoscale model for the Italian GPS permanent stations

摘要: Abstract Ground-based GPS meteorology has been developed during the last decade. Beside traditional application for precise geodesy, system proved to be a powerful tool in atmospheric studies, such as climatology and meteorology. During 1999, at Space Geodesy Center (CGS) of Italian Agency (ASI) an operative automatic was order produce tropospheric parameters on daily basic permanent stations. In this work operational processing data is described. Moreover, validation through comparison with other independent solutions well techniques presented. The internal zenith delay (ZTD) shows bias 5 mm (absolute values) standard deviation ranging from 4 20 mm. For few stations performed between derived precipitable water vapor (PWV) both one computed using MM5 measured by radiometer (WVR) radiosondes (RAOB). agreement within range 2–7 mm; GPS, WVR RAOB ranges 0.85 1.62