BackForwardInstrument:  SAR-S 

Instrument details
Acronym SAR-S
Full name Synthetic Aperture Radar (S-band)
Purpose High-resolution all-weather multi-purpose imager for ocean, land and ice. Specific for soil moisture
Short description S-band SAR, frequency ~ 2.7 GHz
Background New development
Scanning Technique Side-looking, swath 100 km
Resolution 20 m
Coverage / Cycle Global coverage in two months
Mass Power Data Rate

 

Providing Agency CAST
Instrument Maturity Demonstration pending
Utilization Period: 2013 to ≥2020
Last update: 2012-06-05
Detailed characteristics
Satellites this instrument is flying on

Note: a red tag indicates satellites no longer operational, a green tag indicates operational satellites, a blue tag indicates future satellites

Instrument classification
  • Earth observation instrument
  • Active and radio-occultation sensor
  • Imaging radar (SAR)
Mission objectives
Primary mission objectives
  • Biomass
  • Fraction of vegetated land
  • Land cover
  • Land surface topography
  • Oil spill cover
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Tentative Evaluation of Measurements

The following list indicates which measurements can typically be retrieved from this category of instrument. To see a full Gap Analysis by Variable, click on the respective variable.

Note: table can be sorted by clicking on the column headers
VariableRelevance for measuring this variableOperational limitationsExplanation
Biomass2 - very highIndex only.. Infrequent coverage.S-band sensitive to total biomass
Dominant wave direction5 - marginalInfrequent coverage.S-band SAR. Variable measured by spectral analysis of "imagettes"
Dominant wave period5 - marginalInfrequent coverage.S-band SAR. Variable measured by spectral analysis of "imagettes"
Fire fractional cover3 - highInfrequent coverage.S-band SAR. High resolution, for fire boundary detection
Fraction of vegetated land5 - marginalNo specific limitation.S-band SAR
Glacier cover1 - primaryLong time for mapping.S-band SAR for accurate boundary detection
Glacier motion2 - very highInfrequent coverage.S-band SAR for interferometry between images taken at time intervals
Glacier topography2 - very highLong time for mapping.S-band SAR for interferometry between images taken at time intervals
Ice sheet topography2 - very highLong time for mapping.S-band SAR for interferometry between images taken at time intervals
Land cover5 - marginalNo specific limitation.S-band SAR
Land surface topography2 - very highLong time for mapping.S-band SAR for interferometry between images taken at time intervals
Oil spill cover2 - very highInfrequent coverage.S-band SAR
Sea-ice cover1 - primaryNo specific limitation.S-band SAR
Sea-ice elevation5 - marginalNo specific limitation.S-band SAR. Sea ice elevation measured by interferometry
Sea-ice thickness5 - marginalChange detection only.S-band SAR. Sea ice elevation measured by interferometry. Thickness inferred by ice model
Sea-ice type3 - highNo specific limitation.S-band SAR. Type interpreted as age/roughness
Significant wave height5 - marginalHighly indirect.. Infrequent coverage.S-band SAR. Retrieved by spectral analysis of "imagettes". Boundary condition necessary for the retrieval
Snow water equivalent4 - fairChange detection only.. Infrequent coverage.S-band SAR. SWE is retrieved by grigging with data from ground networks
Soil moisture (in the roots region)2 - very highAffected by vegetation.. Infrequent coverage.S-band SAR
Soil moisture at surface2 - very highInfrequent coverage.S-band SAR
Soil type5 - marginalNo specific limitation.S-band SAR
Vegetation type5 - marginalNo specific limitation.S-band SAR
Wave directional energy frequency spectrum5 - marginalInfrequent coverage.S-band SAR. Variable measured by spectral analysis of "imagettes"