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NISAR features most advanced radar system ever launched on a NASA mission

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Chennai: US Space Agency NASA said that the Indo-US collaborative NISAR satellite will feature the most advanced radar system ever launched on a NASA science mission.

It will help in studying natural hazards, melting sea ice, groundwater supply, and more, NASA said in a release after the satellite landed in Bengaluru for the proposed January 2024 launch.

The Earth Observation Satellite will be launched into a near-polar Earth Orbit from the Second Launch Pad from the spaceport of Sriharikota using ISRO’s heaviest launch vehicle GSLV-MkIII/LVM-3.

The NISAR Earth science mission has moved a step closer to its 2024 launch.

Its science payload of two radar systems, one built by NASA and the other by the Indian Space Research Organisation (ISRO), recently completed the journey from NASA’s Jet Propulsion Laboratory in Southern California to ISRO’s U R Rao Satellite Centre in Bengaluru in India.

“Soon, teams at the facility will combine the radar systems with the satellite’s body, or bus, and run it through tests in advance of its three year mission” NASA said.

Short for NASA-ISRO Synthetic Aperture Radar, NISAR satellite will observe nearly all of Earth’s land and ice surfaces twice every 12 days, measuring movements in extremely fine detail. It will also survey forests and agricultural regions to help scientists understand carbon exchange between plants and the atmosphere.

NISAR’s payload will be the most advanced radar system ever launched as part of a NASA science mission, and it will feature the largest-ever radar antenna of its kind: a drum-shaped, wire mesh reflector nearly 40 feet (12 meters) in diameter that will extend from a 30-foot (9-meter) boom.

NISAR Mechanical Integration Lead Scott Nowak explains how his team of engineers worked to prepare the NISAR science payload for its trip from a JPL clean room to India, where it will be combined with the satellite body.

The mission’s science instruments consist of L- and S-band radar, so named to indicate the wavelengths of their signals.

ISRO built the S-band radar, which it shipped to JPL in March 2021. Engineers spent much of the last two years integrating the instrument with the JPL-built L-band system, then conducting tests to verify they work well together.

In late February 2023, technicians and engineers working in a JPL clean room put the science payload into a specially designed shipping container before hoisting it onto a flatbed truck for the drive to March Air Reserve Base in California’s Riverside County.

A U.S. Air Force C-17 cargo plane carried it from there to Bengaluru, touching down on March 6, NASA said.

Once in operation, NISAR will be able to collect measurements day and night, in all weather conditions, and its trove of data will help researchers better understand a broad range of Earth science topics, including landslides, groundwater loss, and the carbon cycle.

NISAR is the first-ever collaboration between NASA and ISRO on an Earth- observing mission. JPL, which is managed for NASA by Caltech in Pasadena, leads the U.S. component of the project and is providing the mission’s L-band SAR.

NASA is also providing the radar reflector antenna, the deployable boom, a high-rate communication subsystem for science data, GPS receivers, a solid-state recorder, and payload data subsystem. ISRO is providing the spacecraft bus, the S-band SAR, the launch vehicle, and associated launch services and satellite mission operations.

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