VISSRVisible and Infrared Spin Scan Radiometer
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Compared with the current FY-2 VISSR, the FY-4A AGRI will have nine more spectral bands, increased spectral resolution, improved radiometric accuracy, and improved imager registration and navigation.
standard atmosphere, along with the spectral coverage of the VISSR (green) on board the FY-2, AGRI (red) on board the FY-4, and SEVIRI (blue) on board the MSG.
The spacecraft body carries the VISSR and other instruments and spins at 100 rpm, while the antenna portion remains pointed toward Earth.