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TRISHNA (Thermal infraRed Imaging Satellite for High-resolution Natural resource Assessment) is a French-Indian mission to acquire imagery of Earth’s surface in the thermal infrared with a high resolution and revisit frequency.

TRISHNA has two sensors: a Thermal Infrared (TIR) instrument and a Visible and Near Infrared (VNIR/SWIR) sensor (VSWIR).

  • TIR measures top-of-atmosphere radiances, brightness temperatures, surface radiance, temperature, and emissivity using four thermal bands. Variables related to the energy budget at the soil-plant-atmosphere interface, such as net radiation, evapotranspiration, and water stress index, are also measured. TIR will have a significant impact on climate change studies where sea and land surface temperatures are key variables.
  • VSWIR will work in conjunction with TIR to provide observations in six VNIR/SWIR bands. This will provide critical information on water use, soil pollution, coastal and inland water monitoring, urban microclimate monitoring, volcanic monitoring, geothermal exploration, vegetation and land coverage, cryosphere monitoring, and atmospheric and cloud information.
Nation: India, France
Type / Application: Earth Science
Operator: ISRO, CNES
Contractors: ISRO, CNES
Equipment: TIR, VSWIR
Configuration: IRS-1k bus
Propulsion: ?
Power: 2 deployable solar arrays, batteries
Lifetime: 5 years
Mass: 770 kg
Orbit: 751 km SSO
Satellite COSPAR Date LS Launch Vehicle Remarks


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