Analysis on the Observation Model of Foreign Geostationary Meteorological Satellite

After years of development, the observation mode of foreign geostationary meteorological satellite was progressively developed from regular full disk to a combination of regular full disk and regional mode.Regular full disk observations used to support tracking of large-scale weather systems, applications of numerical weather prediction and construction of climate data sets, while regional observations used to monitor 1000-2000 km scale weather systems, especially typhoon and rapidly changing small and medium-scale convective systems.Regional observation gives a full play to the new generation of satellite imaging instruments advantage of temporal and spatial resolution in weather analysis and early warning service.In order to provide reference of the observation mode optimization for China's second generation geostationary meteorological satellites(fengyun 4 series), two representative typical optical imaging instruments of new generation geostationary meteorological satellites, linear array two-dimensional scanning imaging instrument of GOES-R(US)& MTG(Europe)and focal plane array ocean color instrument of Korea Meteorological ocean satellite, are selected to discuss its flexible imaging mode.