What is the full form of NISAR, the satellite launched by ISRO on July 30, 2025?

A. National ISRO Synthetic Aperture Radar A.

B. NASA-ISRO Synthetic Aperture Radar B.

C. National India Space and Radar C.

D. NASA-India Space Array Radar D.

NISAR stands for NASA-ISRO Synthetic Aperture Radar and is a joint Earth-observing mission between NASA and the Indian Space Research Organisation (ISRO).
The satellite was launched by ISRO on 30 July 2025 aboard the GSLV-F16 rocket from the Satish Dhawan Space Centre.
NISAR carries dual-frequency polarimetric synthetic aperture radars — an L-band radar supplied by NASA and an S-band radar provided by ISRO — enabling all-weather, day-and-night imaging to monitor changes in land, ice, and ecosystems.
The mission aims to provide high-resolution measurements for applications including natural hazard assessment, climate change monitoring, forest biomass estimation, and disaster response.
The planned mission life is several years, with an initial checkout and commissioning phase following the July 2025 launch before full science operations begin.

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