THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - SAR (RISAT) -
Full Name Synthetic Aperature Radiometer (RISAT) Status Operational
Instrument Agencies ISRO Maturity
Instrument Type Imaging microwave radars Geometry Side-looking
Instrument Technology Imaging radar (SAR) Sampling Imaging
Data Access Constrained Access Data Format
Measurements and Applications Radar backscatter measurements of land, water and ocean surfaces for applications in soil moisture, crop applications (under cloud cover), terrain mapping, etc.
Resolution Summary 3 - 6 m (FRS-1), 9 - 12 m (FRS-2), 25/50 m (MRS/CRS)
[Best Resolution: 3m]
Swath Summary 30 km (HRS), 30 km (FRS-1/FRS-2), 120/240 km (MRS/CRS)
[Max Swath: 240 km]
Accuracy Summary
Waveband Summary C-Band (5.350 Ghz)
MW (~1.0 cm - ~100 cm)
C-Band (8 - 4 GHz)
Instrument Measurements
CategoryParameterAccuracy
Albedo and reflectanceEarth surface albedo 
Ice sheet topographySea-ice sheet topography 
Multi-purpose imagery (land)Land surface imagery 
Ocean topography/currentsOcean dynamic topography 
Sea ice cover, edge and thicknessSea-ice cover 
Snow cover, edge and depthSnow cover 
Soil moistureSoil moisture at the surface 
VegetationVegetation type 
Instrument Missions
RISAT-1 - Radar Imaging Satellite (2012 - 2017)
RISAT-1A - Radar Imaging Satellite (2018 - 2023)
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