Assessment of the Geostationary Hyperspectral Infrared Sounders Impact through the Community Global OSSE Package

The purpose of this research is to assess the impact of an experimental satellite observation, the geostationary hyperspectral infrared sounders (Geo-Hyper IR) under an all operational observation scenario, and a data gap scenario with no early-afternoon orbiting satellites. IASI is used to represent the Geo-Hyper IR sounders. These sounders were simulated from the GEOS-5 Nature Run (G5NR), on five geostationary satellites with the center longitudes of 0°, 60°, 140°, 225°, and 285° at the Equator. They are then assimilated into a hybrid 3D Ensemble-Var data assimilation system, i.e. GDAS, through the Community Global OSSE Package (CGOP), with the resolution of T670/T254.