ISRO Missions and Discoveries

NISAR Satellite will be able to monitor Tectonic Movements: ISRO chief


From UPSC perspective, the following things are important :

Prelims level: NISAR and its features

Mains level: NA

Why in the News?

The ISRO Chief has confirmed that the NISAR Satellite would be able to monitor the Tectonic Movements of Earth with high precision with a centimeter accuracy.

  • Originally planned for July, the NISAR launch may be delayed to October-November due to issues on the U.S. spacecraft side.

About NISAR Satellite:

  • NISAR (NASA-ISRO Synthetic Aperture Radar) is a joint satellite mission between NASA and ISRO.
  • It would be a Low Earth Orbit observatory.
  • This mission is aimed at enhancing our understanding of Earth’s natural processes and environmental changes.

Features of NISAR Satellite:

  • L-band and S-band Radar Frequencies:
      • NASA is responsible for the L-band radar, while ISRO provides the S-band radar.
      • This dual-band capability allows the satellite to monitor and measure Earth’s surface with high precision in all weather conditions and throughout both day and night.
  • Large Deployable Antenna: 
      • It is equipped with a large deployable antenna that measures 12 meters in diameter.
      • This large antenna enhances the satellite’s ability to capture detailed radar images with high resolution.
      • It will have a 39-foot stationary antenna reflector, made of a gold-plated wire mesh to focus radar signals emitted and received by the upward-facing feed on the instrument structure.
  • Rapid Coverage: 
      • NISAR is designed to scan the entire Earth every 12 days.
      • This rapid revisiting is crucial for observing and understanding temporal changes in the environment, such as shifting vegetation patterns, ice dynamics, and other critical parameters.
  • Versatile Monitoring Capabilities: 
    • It will monitor Earth’s ecosystems and dynamics, including forest biomass, ice sheet collapses, and natural hazards such as earthquakes, tsunamis, and volcanic eruptions.
    • Its radar system can penetrate vegetation and soil to provide three-dimensional reconstructions of structures and changes.


[2015] The term ‘IndARC’ sometimes seen in the news, is the name of?

(a) An indigenously developed radar system inducted into Indian Defence.

(b) India’s satellite to provide services to the countries of Indian Ocean Rim.

(c) A scientific establishment set up by India in Antarctic region.

(d) India’s underwater observatory to scientifically study the Arctic region.

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