THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - SRAL -
Full Name SAR Radar Altimeter Status Operational
Instrument Agencies ESA, COM Maturity
Instrument Type Radar altimeters Geometry Nadir-viewing
Instrument Technology Radar altimeter Sampling Other
Data Access Open Access Data Format
Measurements and Applications Marine and land services.
Resolution Summary 300 m
[Best Resolution: 300m]
Swath Summary Profiling
Accuracy Summary 3 cm in range (1 s average, 2 m SWH including atm. corrections)
Waveband Summary Dual freq radar altimeter, Ku-band, C-band
MW (~1.0 cm - ~100 cm)
Ku-Band (12.5 to 18 GHz)
C-Band (8 - 4 GHz)
Instrument Measurements
CategoryParameterAccuracy
Atmospheric Humidity FieldsAtmospheric specific humidity (TC) 
Gravity, Magnetic and Geodynamic measurementsGeoid 
Ice sheet topographySea-ice sheet topography 
Landscape topographyLand surface topography 
Ocean surface windsWind speed over sea surface (horizontal) 
Ocean topography/currentsSea level 
Ocean dynamic topography 
Ocean wave height and spectrumSignificant wave height 
Sea ice cover, edge and thicknessSea-ice cover 
Sea-ice thickness 
Instrument Missions
Sentinel-3 A - Sentinel-3 A (2016 - 2023)
Sentinel-3 B - Sentinel-3 B (2018 - 2025)
Sentinel-3 C - Sentinel-3 C (2023 - 2029)
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