THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - Sounder (INSAT) -
Full Name IR Sounder Status Operational
Instrument Agencies ISRO Maturity
Instrument Type Atmospheric temperature and humidity sounders Geometry TBD
Instrument Technology Narrow-band channel IR radiometer Sampling Sounding
Data Access Constrained Access Data Format
Measurements and Applications Atmospheric soundings, atmospheric stability, thermal gradient winds.
Resolution Summary 10 x 10 km
Swath Summary Full (Full Earth disc sounding), Program (Options provided for for Sector Scans)
Accuracy Summary
Waveband Summary SWIR: 3.74 - 4.74 µm; MWIR: 6.51 - 11.03 µm; TIR: 12.02 - 14.71 µm; VIS: 0.55 - 0.75 µm
VIS (~0.40 µm - ~0.75 µm)
MWIR (~3.0 µm - ~6.0 µm)
TIR (~6.0 µm - ~15.0 µm)
Instrument Measurements
CategoryParameterAccuracy
Atmospheric Humidity FieldsAtmospheric specific humidity (LT) 
Atmospheric Temperature FieldsAtmospheric temperature (LT) 
Surface temperature (ocean)Sea surface temperature 
Instrument Missions
INSAT-3D - Indian National Satellite - 3D (2013 - 2020)
INSAT-3DR - Indian National Satellite - 3DR (repeat) (2016 - 2023)
INSAT-3DS - Indian National Satellite - 3DS (2022 - 2029)
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