NISAR, NASA-ISRO’s Joint Expensive Satellite Project

NISAR is the short name of NASA-ISRO Synthetic Aperture Radar.Under this project, two famous space agencies will first create such a satellite, which will be a radar imaging satellite based on the dual frequency. This satellite will be one of the most expensive satellites ever made. The main purpose of this project is monitoring the earth. 

In a meeting in Toronto the  NASA Administrator Charles Bolden and ISRO Chairman K.Radhakrishnan signed two documents to launch the NASA-ISRO satellite mission. NISAR scheduled to launch in 2021( four years from now), from India.

This satellite will take weekly snapshots of the earth, that will provide time-lapse images of the motion of tectonic plates,   ecosystem disturbances,  ice sheets and changes in volcanoes  and landslides.

Paul A Rosen, a scientist working on the NISAR satellite project said, “What we are doing is looking at time variability of the Earth over the life of the mission to understand how disasters evolve, how earthquakes occur, how volcanoes occur, how the ice sheets are changing and affecting sea level rise, and how forest fires and changes in the forest cover affect the atmosphere.”

“It is very relevant to what society cares about which is changes in our climate, changes in our environment and how it affects society.”





The satellite work on dual frequency radar  technology.  So the first SAR is L- band  L-band synthetic aperture radar and the second one is S-band synthetic aperture radar. The L band SAR is designed for 24-centimeter wavelength, and S band for 12-centimeter wavelength. NASA will provide L-band SAR and ISRO provides S-band SAR.  

 

Source: TheBetterIndia

 

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