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VOL. I · EST. 11.2025 
SatyaDheesh
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ISRO and CNES are preparing to launch TRISHNA from Sriharikota in 2027

GS3Economy · S&T · Environment · Security· Space technology (ISRO, missions)· Prelims·

Space technology for water resource management: a relevant GS3 Science & Technology and Environment topic.

Why in news

ISRO and CNES are collaborating to launch the TRISHNA satellite from Sriharikota in 2027 to map water resources and monitor the global water cycle.

Background

TRISHNA (Thermal infraRed Imaging Satellite for High-resolution Natural resource Assessment) will operate in a Sun-synchronous orbit above 700 km. It aims to provide a resolution better than 60 metres with multiple revisits per week.

Facts for Prelims

  • S&TTRISHNA: Thermal infraRed Imaging Satellite for High-resolution Natural resource Assessment
  • FactTRISHNA will operate in a Sun-synchronous orbit more than 700 kilometres above Earth
  • FactTRISHNA aims to deliver a resolution better than 60 metres
  • PlaceSriharikota: Launch site for the TRISHNA mission
  • S&TCNES (French space agency) supplies the thermal infrared instrument; ISRO develops the optical payload

Prelims practice question

In which orbit will the TRISHNA satellite operate to map water resources?

  1. (a)Sun-synchronous orbit
  2. (b)Geostationary orbit
  3. (c)Polar orbit
  4. (d)Low Earth Orbit
Show answer

Answer: (a) Sun-synchronous orbit — The note states that TRISHNA will operate in a Sun-synchronous orbit above 700 km.

For Mains

Q. Discuss how space-based remote sensing technologies like TRISHNA can mitigate the challenges of water scarcity and climate change in India.

Dimensions to cover in your answer

  • Data resolution gap: Bridging the trade-off between high-frequency observations and high-spatial resolution
  • Climate adaptation: Monitoring transpiration and sublimation to manage retreating glaciers and intensifying droughts

Keywords: Remote Sensing · Sun-synchronous orbit · Thermal Infrared · Water Scarcity · Space Cooperation

Read the full news →Report a mistake in this noteSource: NDTV ↗Also: GS3 · Climate change & international agreements

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