ISRO gives details on Indo-French TRISHNA mission

TRISHNA (Thermal Infra-Red Imaging Satellite for High-resolution Natural Resource Assessment) is a collaborative mission between ISRO (Indian Space Research Organisation) and CNES (French Space Agency) aimed at monitoring surface temperature and water management on both regional and global scales.

About TRISHNA Mission

1. Objective: The mission's primary goal is the detailed monitoring of energy and water budgets of the continental biosphere, enabling quantification of terrestrial water stress and water use and high-resolution observation of water quality and dynamics.

• It will also help in a Comprehensive assessment of urban heat islands, Detection of thermal anomalies linked to volcanic activity and geothermal resources, etc. 

2. Primary Payloads: TRISHNA carries two main instruments:

1. Thermal Infra-Red (TIR) payload: Provided by CNES, this instrument features a four-channel long-wave infrared imaging sensor.
2. Visible – Near Infra-Red – Short Wave Infra-Red (VNIR-SWIR) payload: Developed by ISRO, this instrument encompasses seven spectral bands designed for detailed mapping of surface reflectance.

3. Orbit and Lifespan: TRISHNA will operate in a Sun-synchronous (SSO) orbit, ensuring consistent illumination conditions for imaging. The mission is designed for a 5-year operational lifespan.
4. Significance: The data collected by TRISHNA will have wide-ranging applications, including:

1. Climate monitoring: Improved understanding of droughts, permafrost changes, and evapotranspiration rates
2. Urban planning: Creation of detailed urban heat island maps and heat alerts
3. Water resource management: Assessment of water stress and efficient water use

India's International Space Cooperation

TRISHNA is just one example of India's robust international collaboration in space exploration. Other notable partnerships include:

1. India-France: Strategic Space Dialogues, Letter of Intent on Defense Space Cooperation, space exchanges, and defense space industrial cooperation.
2. India-US: Bilateral space situational awareness arrangement (2022), NASA-ISRO Synthetic Aperture Radar (NISAR) Mission.
3. Others: Lunar Polar Exploration (LUPEX) Mission with Japan, South Asia Satellite (SAS) benefiting India's neighbors.

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