THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - GIIRS -
Full Name Geostationary Interferometric Infrared Sounder Status Operational
Instrument Agencies NSMC-CMA Maturity
Instrument Type Atmospheric temperature and humidity sounders Geometry
Instrument Technology Sampling Sounding
Data Access Data Format
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.
Resolution Summary LWIR/S/MIR: 16km SSP VIS: 2km SSP
[Best Resolution: 2000m]
Swath Summary
Accuracy Summary 1.5k (3σ) radiation, 10 ppm (3σ) spectrum
Waveband Summary 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)
TIR (~6.0 µm - ~15.0 µm)
Instrument Measurements
CategoryParameterAccuracy
Atmospheric Humidity FieldsAtmospheric specific humidity (column/profile) 
Atmospheric Temperature FieldsAtmospheric temperature (column/profile) 
Instrument Missions
FY-4A - FY-4A Geostationary Meteorological Satellite (2016 - 2023)
FY-4B - FY-4B Geostationary Meteorological Satellite (2018 - 2025)
FY-4C - FY-4C Geostationary Meteorological Satellite (2020 - 2027)
FY-4D - FY-4D Geostationary Meteorological Satellite (2023 - 2030)
FY-4E - FY-4E Geostationary Meteorological Satellite (2027 - 2034)
FY-4F - FY-4F Geostationary Meteorological Satellite (2030 - 2037)
FY-4G - FY-4G Geostationary Meteorological Satellite (2033 - 2040)
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