BackForwardInstrument:  TRISHNA 

Instrument details
Acronym TRISHNA
Full name TRISHNA
Purpose High resolution land observation
Short description Information only partially available. 4 TIR channels in the range 8.6-11.5 μm, 6 VNIR channels in the range 485-2130 nm.
Background New development
Scanning Technique Pushbroom, swath 932 km
Resolution 50 m at s.s.p.
Coverage / Cycle Global in 3 days
Mass Power Data Rate

 

Providing Agency ISRO
Instrument Maturity Flown on an R&D satellite
Utilization Period: ≥2021 to ≥2026
Last update: 2018-06-11
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
  • Fire fractional cover
  • Fraction of Absorbed PAR (FAPAR)
  • Fraction of vegetated land
  • Land cover
Show allShow fewer
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
Biomass4 - fairCloud sensitive.. Index only.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels. Biomass inferred from NDVI and LAI
Cloud cover2 - very highInfrequent coverage.Channels in VIS, NIR, SWIR and the TIR window around 11 micrometers
Cloud optical depth3 - highLow-density cloud only.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels
Cloud top height4 - fairInfrequent coverage.TIR window channels around 11 micrometers to estimate cloud top height from its temperature
Cloud top temperature4 - fairInfrequent coverage.TIR window channels around 11 micrometers
Cloud type2 - very highInfrequent coverage.Channels in VIS, NIR, SWIR and the TIR window around 11 micrometers
Earth surface albedo5 - marginalCloud sensitive.. Infrequent coverage.VIS channels
Fire fractional cover1 - primaryCloud sensitive.. Infrequent coverage.VIS and TIR channels
Fire radiative power5 - marginalCloud sensitive.. Infrequent coverage.TIR window channel(s) around 11 micrometers
Fire temperature5 - marginalCloud sensitive.. Infrequent coverage.TIR window channel(s) around 11 micrometers
Fraction of Absorbed PAR (FAPAR)4 - fairCloud sensitive.. Infrequent coverage.VIS channels including Red at 700 nm
Fraction of vegetated land1 - primaryCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
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 channels
Land surface temperature4 - fairCloud sensitive.. Infrequent coverage.TIR split window channels around 11 micrometers for water vapour correction
Leaf Area Index (LAI)2 - very highCloud sensitive.. Daylight only.. Infrequent coverage.VIS, NIR and SWIR channels
Normalised Difference Vegetation Index (NDVI)2 - very highCloud sensitive.. Infrequent coverage.VIS and NIR channels
Photosynthetically Active Radiation (PAR)4 - fairCloud sensitive.. Infrequent coverage.VIS channels, range undersampled
Sea surface temperature4 - fairCloud sensitive.. Infrequent coverage.TIR split window channels for water vapour correction
Sea-ice cover2 - very highCloud sensitive.VIS, NIR (for contour enhancement), SWIR (for discrimination from clouds) and TIR 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 surface4 - fairCloud sensitive.. Index only.. Infrequent coverage.VIS and TIR window channels. Soil moisture inferred from thermal inertia
Soil type1 - primaryCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
Integrated Water Vapour (IWV)4 - fairCloud sensitive.. Low troposphere dominant.. Infrequent coverage.TIR channels in the 11 micrometers split window
Upward short-wave irradiance at TOA5 - marginalSpectral interpolation needed.. Information on BRDF needed.. Infrequent coverage.VIS, NIR and SWIR channels
Vegetation type2 - very highCloud sensitive.. Daylight only.VIS, NIR and SWIR channels
Aerosol volcanic ash5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels
Aerosol volcanic ash Total Column5 - marginalCloud sensitive.. Infrequent coverage.. Daylight only.VIS, NIR and SWIR channels