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NASA-ISRO Synthetic Aperture Radar (NISAR)


The ‘NASA-ISRO Synthetic Aperture Radar’ (NISAR) is poised to facilitate the exploration of how shifts in Earth’s forest and wetland ecosystems impact the global carbon cycle and influence climate change.


GS III: Science and Technology

Dimensions of the Article:

  1. NASA-ISRO Synthetic Aperture Radar (NISAR)
  2. Mission Objectives

NASA-ISRO Synthetic Aperture Radar (NISAR)

NISAR’s Unique Specifications
  • Joint Development: Developed collaboratively by NASA and ISRO in Low Earth Orbit (LEO).
  • Size and Weight: Approximately the size of an SUV, weighing 2,800 kilograms.
  • Dual-Frequency Radar: Equipped with L-band and S-band synthetic aperture radar (SAR) instruments.
  • Dual-Frequency Imaging: First satellite to utilize both L-band and S-band radar frequencies to monitor Earth’s surface.
  • All-Weather Capability: SAR can operate in cloudy conditions and collect data day and night, regardless of weather.

NASA and ISRO’s Involvement

  • NASA’s Contributions: L-band radar, GPS, solid-state recorder, and payload data subsystem.
  • ISRO’s Contributions: S-band radar, GSLV launch system, and spacecraft.
  • Prominent Antenna: Features a large 39-foot stationary gold-plated wire mesh antenna reflector to focus radar signals.

Mission Objectives

Earth Monitoring
  • Ecosystems and Surfaces: Measure changes in Earth’s ecosystems and dynamic surfaces.
  • Ice Masses: Provide data on ice masses, aiding in the understanding of ice-related phenomena.
  • Varied Applications: Offer insights into biomass, natural hazards, sea level rise, and groundwater.
Global Observations
  • Regularity: Observe land and ice-covered surfaces worldwide with a 12-day cycle on ascending and descending passes.

-Source: The Hindu


December 2023