Measurements and Applications
Measurement of the atmospheric infrared upwelling radiance with radiometric
calibration, the geolocation information, and the quality control information. The data are mainly used for NWP data assimilation, temperature and moisture
retrievals, trace gases retrieval, Land/Sea skin temperature retrieval, and cloud
properties research.
Full Name
Geostationary Interferometric Infrared Sounder-II
Status
Operational
Instrument Agencies
Maturity
Instrument Type
Atmospheric temperature and humidity sounders 
Geometry
Earth disk scanning
Instrument Technology
High-resolution nadir-scanning IR spectrometer
Sampling
Sounding
Data Access
Constrained Access
Data Format
L-1 data: HDF 5.0
Resolution
LWIR/SMWIR: 12km s.s.p
Panchromatic band: 1.0km s.s.p
Swath
The sounder scans the Earth in a "step-stare" mode. The observation area is a pre-designed region covering China's territory, and the coverage time is 1.5 hours.
Accuracy
Radiometric accuracy: 0.7k (1σ); Spectral accuracy: 7 ppm (1σ)
Waveband
LWIR: 680-1130 cm-1, 721 channels
SMWIR: 1650-2250 cm-1, 961 channels
Panchromatic band: 0.55-0.75 µm, 1 channel
| SWIR (~1.3 µm - ~3.0 µm) |
| MWIR (~3.0 µm - ~6.0 µm) |
| P-Band (0.999 - 0.2998 GHz) |
FY-4B - FY-4B Geostationary Meteorological Satellite (2021 - 2028) |