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TRISHNA: ISRO AND FRANCE’S CLIMATE SATELLITE



  Jun 11, 2024

TRISHNA: ISRO AND FRANCE’S CLIMATE SATELLITE



Trishna, short for Thermal InfraRed Imaging Satellite for High-resolution Natural resource Assessment, is a collaborative satellite mission between the Indian Space Research Organisation (Isro) and the French Space Agency CNES. Engineered to deliver high spatial and temporal resolution observations, Trishna aims to monitor Earth’s surface temperature, vegetation health, and water cycle dynamics.

Key Features and Capabilities

• High-Resolution Imaging: Trishna will provide high spatial resolution (57m for land/coastal and 1km for ocean/polar regions) with a frequent revisit time of just 2-3 days. This will enable unprecedented monitoring of surface temperatures, soil moisture, evapotranspiration rates, and vegetation health indicators.

• Cutting-edge Technology: The satellite will carry two advanced imaging payloads:

• Thermal Infrared (TIR) Instrument: Developed by CNES, this instrument will map surface temperatures and emissivities across four thermal bands.

• Visible-Shortwave Infrared (VSWIR) Sensor: Developed by Isro, this sensor will complement the TIR instrument with observations across seven spectral bands for vegetation monitoring.

Objectives and Impact

• Energy and Water Budgets: Trishna will monitor the energy and water budgets of the continental biosphere, quantifying terrestrial water stress and water use efficiency.

• Water Quality: The satellite will provide high-resolution observations of coastal and inland water quality dynamics.

• Climate Challenges: Trishna’s high-quality data will directly contribute to tackling climate challenges. It will help optimize irrigation, improve crop productivity, and enable sustainable water management practices. Urban planners will benefit from detailed urban heat island mapping, while water resource managers can monitor pollution in rivers, lakes, and coastal areas. The mission will also support disaster management by detecting forest fires and volcanic activity.

• Global Mitigation Efforts: Measurements of key climate variables like evapotranspiration, snow/glacier dynamics, and permafrost changes will help improve climate models and support global mitigation efforts through the UN’s Sustainable Development Goals.

While Isro has released details about Trishna, the launch timeline for the mission is yet to be announced. However, it is slated for launch in 2025.



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