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
Measurements Overview
CategoryParameter
Atmospheric Humidity FieldsAtmospheric specific humidity (LT)
Atmospheric Temperature FieldsAtmospheric temperature (LT)
Surface temperature (ocean)Sea surface temperature
Thematic Links Global Climate Observing System Essential Climate Variables (GCOS ECVs)
ECVDescriptionProduct(s)ECV Inventory 3.0 Record(s)
Sea Surface Temperature click here click here search ECV Inventory records
Temperature (upper-air) click here click here search ECV Inventory records
Water Vapour (upper air) click here click here search ECV Inventory records
Instrument Missions
INSAT-3D - Indian National Satellite - 3D (2013 - 2024)
INSAT-3DR - Indian National Satellite - 3DR (repeat) (2016 - 2025)
INSAT-3DS - Indian National Satellite - 3DS (2022 - 2029)
INSAT-3DS - Indian National Satellite - 3DS (Spare) (2024 - 2030)