BackForwardInstrument:  HISUI 

Instrument details
Acronym HISUI
Full name Hyperspectral Imager Suite
Purpose High resolution land observation, specific for vegetation
Short description Assemblage of two subsystem: a high-resolution multispectral radiometer (4 VIS/NIR channels) and a hyperspectral radiometer (57 VIS/NIR channels and 128 NIR/SWIR channels) [see detailed characteristics below]
Background Improved version of ASTER flown on EOS-Terra.
Scanning Technique Pushbroom. Swath: multispectral 90 km; hyperspectral 30 km tilted cross-track within the 90 km field-of-regard
Resolution 5 m (multispectral) and 30 m (hyperspectral)
Coverage / Cycle Global in 1 months
Mass Power Data Rate

 

Providing Agency JAXA
Instrument Maturity Flown on an R&D satellite
Utilization Period: ≥2020 to ≥2027
Last update: 2017-03-29
Detailed characteristics

Spectral interval

Spectral resolution

SNR @ typical input

Resolution

Swath

0.45-0.52 µm

100 nm

 

5 m

90 km

0.52-0.60 µm

80 nm

 

5 m

90 km

0.63-0.69 µm

69 nm

 

5 m

90 km

0.76-0.90 µm

140 nm

 

5 m

90 km

0.40-0.97 µm

10 nm (57 channels)

> 450 @ 0.62 µm

30 m

30 km

0.90-2.50 µm

12.5 nm (128 channels)

> 300 @ 2.1 µm

30 m

30 km

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
  • High resolution optical imager
Mission objectives
Primary mission objectives
  • Biomass
  • Fraction of Absorbed PAR (FAPAR)
  • Fraction of vegetated land
  • Leaf Area Index (LAI)
  • Normalised Difference Vegetation Index (NDVI)
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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 burden4 - fairCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR (including the 760 nm band for high-level aerosol) and SWIR hyperspectral channels
Aerosol effective radius4 - fairCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR including the 760 nm band for high-level aerosol, and SWIR hyperspectral channels
Aerosol mass mixing ratio4 - fairCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR (including the 760 nm band for high-level aerosol) and SWIR hyperspectral channels
Aerosol Optical Depth4 - fairCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR (including the 760 nm band for high-level aerosol) and SWIR hyperspectral channels
Aerosol type4 - fairCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR (including the 760 nm band for high-level aerosol) and SWIR hyperspectral channels
Biomass3 - highCloud sensitive.. Index only.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR hyperspectral channels. Biomass inferred from NDVI and other vegetation indexes
Cloud cover4 - fairInfrequent coverage.. Daylight only.VIS, NIR and SWIR hyperspectral channels
Cloud optical depth2 - very highLow-density cloud only.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR hyperspectral channels
Cloud top height4 - fairInfrequent coverage.. Daylight only.NIR hyperspectral channels to estimate the total-column O2 above the cloud top as measured around 760 nm
Downward short-wave irradiance at Earth surface2 - very highCloud sensitive.. Highly indirect.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR hyperspectral channels
Earth surface albedo4 - fairCloud sensitive.. Infrequent coverage.VIS hyperspectral channels
Cloud type5 - marginalCloud sensitive.. Infrequent coverage.. Infrequent coverage.. Daylight only.. Daylight only.VIS, NIR and SWIR hyperspectral channels
Fraction of Absorbed PAR (FAPAR)3 - highHigh troposphere only.. Cloud sensitive.. Infrequent coverage.VIS channels including Red at 700 nm
Fraction of vegetated land1 - primaryCloud sensitive.. Daylight only.VIS, NIR and SWIR hyperspectral
Glacier cover3 - highCloud sensitive.. Long time for mapping.. Daylight only.VIS, NIR and SWIR channels, screening ice from clouds
Land cover1 - primaryCloud sensitive.. Daylight only.VIS, NIR and SWIR hyperspectral channels
Leaf Area Index (LAI)1 - primaryCloud sensitive.. Daylight only.. Infrequent coverage.VIS, NIR and SWIR hyperspectral channels
Normalised Difference Vegetation Index (NDVI)1 - primaryCloud sensitive.. Infrequent coverage.VIS and NIR hyperspectral channels
Oil spill cover4 - fairCloud sensitive.. Daylight only.. Infrequent coverage.VIS hyperspectral channels
Photosynthetically Active Radiation (PAR)3 - highCloud sensitive.. Infrequent coverage.VIS channels, range accurately sampled
Sea-ice cover4 - fairCloud sensitive.. Daylight only.VIS, NIR (for contour enhancement) and SWIR (for discrimination from clouds) channels
Short-wave cloud reflectance4 - fairInfrequent coverage.VIS, NIR and SWIR channels. Unsuitable dynamic range (saturation)
Snow cover1 - primaryCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels, enabling screening snow from clouds
Soil moisture at surface5 - marginalCloud sensitive.. Index only.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR hyperspectral channels. Soil moisture inferred from differential brightness
Soil type1 - primaryCloud sensitive.. Daylight only.VIS, NIR and SWIR hyperspectral channels
Specific humidity4 - fairCloud sensitive.. Very coarse vertical resolution.. Infrequent coverage.. Daylight only.NIR hyperspectral channels including the ro-sigma-tau band of water vapour around 940 nm
Integrated Water Vapour (IWV)5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.NIR hyperspectral channels covering the 940 nm band
Upward short-wave irradiance at TOA5 - marginalSpectral interpolation needed.. Information on BRDF needed.. Infrequent coverage.VIS, NIR and SWIR hyperspectral channels
Vegetation type1 - primaryCloud sensitive.. Daylight only.VIS, NIR and SWIR hyperspectral channels
Aerosol volcanic ash4 - fairCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR hyperspectral channels including the 760 nm band for high-level ash
Aerosol volcanic ash (Total column)4 - fairCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR hyperspectral channels including the 760 nm band for high-level ash