FY-4B GIIRS (Geostationary Interferometric Infrared Sounder) L1b data in HDF format. GIIRS is a MWIR/TIR interferometer with two bands at LWIR: 680~1130 cm-1, MWIR: 1650~2250 cm-1, at a spectral resolution of 0.8 cm-1 and a spatial resolution of 12 km. In addition it contains a VIS imager for cloud detection with a spatial resolution of 1 km.
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