BackForwardInstrument:  HyS-VNIR 

Instrument details
Acronym HyS-VNIR
Full name Hyper-spectral VNIR imager
Purpose Frequent observation of ocean colour, vegetation processes and aerosol
Short description Hyperspectral, 60 channels in the range 400-870 nm. Spectral resolution < 10 nm, SNR > 400.
Background Complementary to HyS-SWIR
Scanning Technique Mechanical, addressable everywhere in the disc with variable area coverage
Resolution 320 m at s.s.p.
Coverage / Cycle Depending on the size of the scanned area. 30 min for the India region
Mass Power Data Rate

 

Providing Agency ISRO
Instrument Maturity Demonstration pending
Utilization Period: ≥2019 to ≥2026
Last update: 2017-03-29
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
  • 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 and NIR hyperspectral channels including the 760 nm band for high-level aerosol
Aerosol effective radius5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS and NIR hyperspectral channels including the 760 nm band for high-level aerosol
Aerosol mass mixing ratio5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS and NIR hyperspectral channels including the 760 nm band for high-level aerosol
Aerosol Optical Depth4 - fairCloud sensitive.. Infrequent coverage.. Daylight only.VIS and NIR hyperspectral channels including the 760 nm band for high-level aerosol
Aerosol type5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS and NIR hyperspectral channels including the 760 nm band for high-level aerosol
Biomass4 - fairCloud sensitive.. Index only.. Infrequent coverage.. Daylight only.VIS and NIR hyperspectral channels. Biomass inferred from NDVI and other vegetation indexes
Cloud cover4 - fairInfrequent coverage.. Daylight only.VIS and NIR hyperspectral channels
Cloud optical depth5 - marginalLow-density cloud only.. Infrequent coverage.. Daylight only.VIS and NIR hyperspectral, channels
Cloud top height5 - marginalInfrequent coverage.. Daylight only.NIR hyperspectral channels to estimate the total-column O2 above the cloud top as measured around 760 nm
Cloud type4 - fairInfrequent coverage.. Daylight only.VIS and NIR hyperspectral channels
Downward short-wave irradiance at Earth surface5 - marginalCloud sensitive.. Highly indirect.. Infrequent coverage.. Daylight only.VIS and NIR hyperspectral channels
Earth surface albedo2 - very highCloud sensitive.VIS hyperspectrrall channels with changing solar incidence angles as daylight progresses
Fire fractional cover1 - primaryCloud sensitive.. Daylight only.VIS channels. Frequent sampling (GEO) enables early detection
Fraction of Absorbed PAR (FAPAR)2 - very highCloud sensitive.. Infrequent coverage.VIS channels including Red at 700 nm
Fraction of vegetated land1 - primaryCloud sensitive.. Daylight only.VIS and NIR hyperspectral channels
Glacier cover5 - marginalCloud sensitive.. Long time for mapping.. Daylight only.VIS and NIR channels
Land cover2 - very highCloud sensitive.. Daylight only.VIS and NIR hyperspectral channels
Leaf Area Index (LAI)4 - fairCloud sensitive.. Daylight only.. Infrequent coverage.VIS and NIR hyperspectral channels. LAI inferred from NDVI and other vegetation indexes
Normalised Difference Vegetation Index (NDVI)1 - primaryCloud sensitive.. Infrequent coverage.VIS and NIR hyperspectral channels
Oil spill cover3 - highCloud sensitive.. Daylight only.. Infrequent coverage.VIS hyperspectral channels
Photosynthetically Active Radiation (PAR)3 - highCloud sensitive.. Infrequent coverage.VIS channels, range accurately sampled
Short-wave cloud reflectance5 - marginalInfrequent coverage.VIS and NIR channels. Unsuitable dynamic range (saturation)
Snow cover3 - highCloud sensitive.. Daylight only.VIS and NIR channels. Frequent sampling (GEO) improves probability of cloud-free views
Soil moisture at surface4 - fairCloud sensitive.. Index only.. Infrequent coverage.. Daylight only.VIS and NIR hyperspectral channels. Soil moisture inferred from differential brightness
Soil type3 - highCloud sensitive.. Daylight only.VIS and NIR hyperspectral channels
Specific humidity5 - marginalCloud 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)4 - fairCloud sensitive.. Infrequent coverage.. Daylight only.NIR hyperspectral channels covering the 940 nm band
Upward short-wave irradiance at TOA4 - fairSpectral interpolation needed.VIS and NIR hyperspectral channels with changing solar incidence angles as daylight progresses
Vegetation type2 - very highCloud sensitive.. Daylight only.VIS and NIR hyperspectral channels
Aerosol volcanic ash5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS and NIR hyperspectral channels including the 760 nm band for high-level ash
Aerosol volcanic ash (Total column)3 - highCloud sensitive.. Daylight only.VIS, NIR hyperspectral channels including the 760 nm band for high-level ash. Frequent sampling (GEO) for early detection of ash plumes