'US handovers NISAR to India' What is 'NISAR' ? Read here!

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NISAR

The NASA-ISRO Synthetic Aperture Radar (NISAR) mission is a joint project between NASA and ISRO to co-develop and launch a dual-frequency synthetic aperture radar on an Earth observation satellite. The satellite will be the first radar imaging satellite to use dual frequencies. It will be used for remote sensing, to observe and understand natural processes on Earth. With An estimated total cost of US$1.5 billion, NISAR is likely to be the world's most expensive Earth-imaging satellite.

 

OVERVIEW

The satellite will be 3-axis stabilized. It uses a 12 m extendable mesh antenna and operates in both the L and S microwave bands. The aperture grid reflector (antenna) is supplied by Northrop Grumman's Astro Aerospace.

The satellite will be launched from India aboard a GSLV in Q1 of 2024. The orbit will be a Sun-synchronous, dawn-to-dusk type. The planned mission life is three years. The project has passed the first stage of the design validation phase and has been reviewed and approved by NASA. ISRO's share of the project cost is about US$99 million, and NASA's share is about US$808 million.

 

OBJECTIVE OF NISAR

Data collected by NISAR will provide information about the evolution and state of the Earth's crust, help scientists understand better about Earth's natural processes and climate changes, and support future resource and hazard management. Water resource monitoring, infrastructure monitoring, and other value-added applications will also be revolutionized by access to these data.

 

PAYLOAD

·        L-band (1.25 GHz; 24 cm wavelength ) polarimetric SAR, to be made by NASA.

·        S-band (3.20 GHz; 9.3 cm wavelength) polarimetric SAR, to be made by ISRO.

 

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