Bengaluru: The preparation date for the launch of NASA-Isro synthetic aperture radar (Nisar) satellite, an Earth observation mission, will be determined by the end of April, NASA said in its latest update on the mission . A key component of the satellite is being returned to the US for additional work. TOI had reported last week that the launch, initially scheduled for March-end, would be delayed and may not happen before May-end, as indicated. by Isro Chairman S Somanath in an exclusive interview. NASA has now said: “…Nisar is almost complete… Work that must be completed before launch includes applying a special coating to the hardware components of the 39-foot (12-meter) radar antenna reflector ) diameter of the satellite, which is among NASA’s main ones. contributions to the mission.” The addition of the special coating is a precautionary measure to mitigate any temperature rise that could affect reflector deployment. “Testing and analysis identified the possibility that the reflector would experience higher temperatures than previously anticipated in its stowed configuration in flight,” NASA said. During scientific operations, the massive reflector will transmit and receive microwave signals to and from the Earth’s surface. allowing Nisar to scan almost all land and icy surfaces on the planet twice every 12 days to collect scientific data. “The special coating that will be added will limit temperature by reflecting more solar radiation onto the reflector hardware. Due to the size and complexity of the reflector, it will be shipped from Isro’s site in India (the UR Rao Satellite Center in Bengaluru, where the satellite is assembled) to a specialized facility in California for coating application,” NASA said. . Once the thermal performance of the coating is fully verified, a launch readiness date will be set, NASA said, adding that when the reflector returns to India, teams from NASA’s Jet Propulsion Laboratory (JPL) and Isro They will integrate it into the satellite. , the first hardware collaboration between NASA and Isro on an Earth observation mission, is a pioneering and exceptionally powerful satellite that, by combining two types of synthetic aperture radars, will offer measurements of the Earth’s evolving surface, including changes to ice sheets and glaciers. wetlands and forests, and lands around volcanoes and earthquake faults,” NASA said.
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