BackForwardInstrument:  TANSO-CAI/2 

Instrument details
Acronym TANSO-CAI/2
Full name Thermal And Near infrared Sensor for carbon Observations - Cloud and Aerosol Imager / 2
Purpose Cloud and aerosol observation
Short description Twin 7-channel UV/VIS/NIR/SWIR radiometer; one radiometer looking 20° fore-, one looking 20° aft-, for improved aerosol observation [see detailed characteristics below]
Background Evolution of TANSO-CAI
Scanning Technique Push-broom, each radiometer 2000 pixel/line (three VNIR channels), 500 pixels/line (SWIR channel); 1000 km swath
Resolution 0.5 km IFOV in VNIR, 1.5 km in SWIR, at s.s.p.
Coverage / Cycle Global coverage in 3 days
Mass Power Data Rate

 

Providing Agency JAXA
Instrument Maturity Flown on an R&D satellite
Utilization Period: ≥2019-01 to ≥2027
Last update: 2014-09-12
Detailed characteristics

Central wavelength

Bandwidth

SNR @ specified albedo

343 nm fore-

20 nm

200 @ 15 % albedo

380 nm aft-

20 nm

200 @ 15 % albedo

443 nm fore-

20 nm

200 @ 15 % albedo

550 nm aft-

20 nm

200 @ 15 % albedo

674 nm fore- & aft-

20 nm

200 @ 11 % albedo

869 nm fore- & aft-

20 nm

200 @ 11 % albedo

1630 nm fore- & aft-

90 nm

200 @ 10 % albedo

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
  • Passive optical radiometer or spectrometer
  • Moderate resolution optical imager
Mission objectives
Primary mission objectives
  • Aerosol Optical Depth
  • Aerosol column burden
  • Cloud cover
  • Cloud optical depth
  • Fraction of Absorbed PAR (FAPAR)
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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
Aerosol column burden5 - marginalCloud sensitive.. Daylight only.UV (for absorbing aerosol), VIS (with narrow bandwidth), NIR and SWIR channels
Aerosol effective radius5 - marginalCloud sensitive.. Daylight only.UV (for absorbing aerosol), VIS (with narrow bandwidth), NIR and SWIR channels
Aerosol mass mixing ratio5 - marginalCloud sensitive.. Daylight only.UV (for absorbing aerosol),VIS (with narrow bandwidth), NIR and SWIR channels
Aerosol Optical Depth5 - marginalCloud sensitive.. Daylight only.UV (for absorbing aerosol), VIS (with narrow bandwidth), NIR and SWIR channels
Aerosol type5 - marginalCloud sensitive.. Daylight only.UV (for absorbing aerosol), VIS (with narrow bandwidth), NIR and SWIR channels
Biomass4 - fairCloud sensitive.. Index only.. Daylight only.VIS, NIR and SWIR channels. Biomass inferred from NDVI and LAI
Cloud cover5 - marginalDaylight only.VIS and NIR channels
Cloud optical depth3 - highLow-density cloud only.. Daylight only.VIS, NIR and SWIR channels
Cloud type5 - marginalDaylight only.VIS and NIR channels
Colour Dissolved Organic Matter (CDOM)5 - marginalCloud sensitive.. Daylight only.A few narrow-bandwidth VIS channels, suitable for a few water types, mainly in open ocean
Downward short-wave irradiance at Earth surface3 - highCloud sensitive.. Highly indirect.VIS, NIR and SWIR channels
Earth surface albedo5 - marginalCloud sensitive.VIS channels
Fire fractional cover5 - marginalCloud sensitive.. Coarse spatial resolution.. Daylight only.VIS channels
Fraction of Absorbed PAR (FAPAR)4 - fairCloud sensitive.VIS channels including Red at 700 nm
Leaf Area Index (LAI)2 - very highCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
Normalised Difference Vegetation Index (NDVI)3 - highCloud sensitive.VIS and NIR channels
Ocean chlorophyll concentration 5 - marginalCloud sensitive.. Daylight only.A few narrow-bandwidth VIS channels, suitable for a few water types, mainly in open ocean
Ocean Diffuse Attenuation Coefficient (DAC)5 - marginalCloud sensitive.. Daylight only.A few narrow-bandwidth VIS channels, suitable for a few water types, mainly in open ocean
Ocean suspended sediments concentration5 - marginalCloud sensitive.. Daylight only.A few narrow-bandwidth VIS channels, suitable for a few water types, mainly in open ocean
Oil spill cover5 - marginalCloud sensitive.. Daylight only.VIS channels with narrow bandwidth
Photosynthetically Active Radiation (PAR)4 - fairCloud sensitive.VIS channels, range undersampled
Sea-ice cover4 - fairCloud sensitive.. Daylight only.VIS, NIR (for contour enhancement) and SWIR (for discrimination from clouds) channels
Short-wave cloud reflectance4 - fairNo specific limitation.VIS, NIR and SWIR channels
Snow cover2 - very highCloud sensitive.. Daylight only.VIS, NIR and SWIR channels, enabling screening snow from clouds
Soil moisture at surface5 - marginalCloud sensitive.. Index only.. Daylight only.VIS, NIR and SWIR channels. Soil moisture inferred from differential brightness
Upward short-wave irradiance at TOA4 - fairSpectral interpolation needed.. Information on BRDF needed.UV, VIS, NIR and SWIR channels
Aerosol volcanic ash5 - marginalCloud sensitive.. Daylight only.UV, VIS, NIR and SWIR channels
Aerosol volcanic ash (Total column)5 - marginalCloud sensitive.. Daylight only.UV (specifically sensitive to ash), VIS, NIR and SWIR channels