THE CEOS DATABASE : Missions, Instruments and Measurements
CEOS EO HANDBOOK – INSTRUMENT SUMMARY - ASAR -
Full Name Advanced Synthetic-Aperture Radar Status No longer operational
Instrument Agencies ESA Maturity
Instrument Type Imaging microwave radars Geometry
Instrument Technology Imaging radar (SAR) Sampling Imaging
Data Access Constrained Access Data Format
Measurements and Applications All-weather images of ocean, land and ice for monitoring of land surface processes, sea and polar ice, sea state, and geological and hydrological applications. Has 2 stripmap modes (Image and Wave (for ocean wave spectra)) and 3 ScanSAR modes.
Resolution Summary Image, wave and alternating polarisation modes: approx 30 x 30 m, Wide swath mode: 150 x 150 m, Global monitoring mode: 950 m x 950 m
[Best Resolution: 30m]
Swath Summary Image and alternating polarisation modes: up to 100 km, Wave mode: 5 km, Wide swath and global monitoring modes: 400 km or more
[Max Swath: 493 km]
Accuracy Summary Radiometric resolution in range: 1.5 - 3.5 dB, Radiometric accuracy: 0.65 dB
Waveband Summary Microwave: C-band, with choice of 5 polarisation modes (VV, HH, VV/HH, HV/HH, or VH/VV)
MW (~1.0 cm - ~100 cm)
C-Band (8 - 4 GHz)
Instrument Measurements
Measurements Overview
CategoryParameter
Ice sheet topographySea-ice sheet topography
Landscape topographyLand surface topography
Multi-purpose imagery (land)Land surface imagery
Multi-purpose imagery (ocean)Ocean imagery and water leaving spectral radiance
Ocean surface windsWind speed over sea surface (horizontal)
Ocean topography/currentsOcean surface currents (vector)
Ocean wave height and spectrumSignificant wave height
Dominant wave period
Dominant wave direction
Sea ice cover, edge and thicknessSea-ice cover
Sea-ice type
Glacier motion
Snow cover, edge and depthSnow cover
Soil moistureSoil moisture at the surface
VegetationVegetation type
Thematic Links Global Climate Observing System Essential Climate Variables (GCOS ECVs)
ECVDescriptionProduct(s)ECV Inventory 3.0 Record(s)
Ocean Colour click here click here search ECV Inventory records
Sea Ice click here click here Eulerian Sea Ice Kinematics Dataset
Sea State click here click here search ECV Inventory records
Snow click here click here MEaSUREs Northern Hemisphere Terrestrial...
Soil Moisture click here click here search ECV Inventory records
Surface Currents click here click here search ECV Inventory records
Instrument Missions
Envisat - Environmental Satellite (2002 - 2012)
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