Measurements and Applications
Measurements of three dimensional atmospheric structure. Large-area, continuous, fast, and accurate vertical air soundings of temperature and humidity. Subsequent units have slightly different specifications.
Full Name
Geostationary Interferometric Infrared Sounder
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/S/MIR: 8km SSP
VIS: 0.5km SSP
[Best Resolution: 4000m]
Accuracy
0.5k (1σ) radiation, 5 ppm (1σ) spectrum
Waveband
LWIR: 700-1130 cm-1, 538 channels
S/MIR: 1650-2250 cm-1, 375 channels
VIS: 0.55-0.75 µm, 1 channel
| VIS (~0.40 µm - ~0.75 µm) |
| SWIR (~1.3 µm - ~3.0 µm) |
| MWIR (~3.0 µm - ~6.0 µm) |
FY-4A - FY-4A Geostationary Meteorological Satellite (2016 - 2025) |
| FY-4B - FY-4B Geostationary Meteorological Satellite (2021 - 2028) |
FY-4C - FY-4C Geostationary Meteorological Satellite (2025 - 2032) |
| FY-4D - FY-4D Geostationary Meteorological Satellite (2026 - 2033) |
| FY-4E - FY-4E Geostationary Meteorological Satellite (2027 - 2034) |
| FY-4F - FY-4F Geostationary Meteorological Satellite (2028 - 2037) |