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The Indian Space Research Organisation (Isro) has completed the development of a radar for the joint earth observation satellite mission with the US space agency National Aeronautics and Space Administration (Nasa). Isro has developed a Synthetic Aperture Radar (SAR), capable of producing extremely high-resolution images for the mission.

Nasa-Isro SAR (NISAR) is a joint collaboration for a dual-frequency L and S-band SAR for earth observation. "NISAR will be the first satellite mission to use two different radar frequencies (L-band and S-band) to measure changes in our planet's surface less than a centimeter across," Nasa said.

Nasa and Isro had signed a partnership on September 30, 2014, to collaborate on and launch NISAR which is targeted to launch in early 2022 from Sriharikota spaceport in Andhra Pradesh.

Nasa providing the mission's L-band SAR, a high-rate communication subsystem for science data, GPS receivers, a solid-state recorder and payload data subsystem.