Indian radar imaging satellite designed for all-weather, day-and-night Earth observation.
RISAT-2BR1 is an X-band radar imaging satellite launched on 11 December 2019 by PSLV-C48 — the 50th flight of the Polar Satellite Launch Vehicle. Its radar uses a large deployable mesh antenna that opens like an umbrella in orbit, allowing it to image the ground at night and through cloud.
Unlike most Indian Earth-observation satellites, it does not fly a sun-synchronous polar orbit. It circles at about 576 km on a 37° inclination, which keeps it over the Indian latitudes far more often and allows frequent revisits for disaster monitoring, agriculture and surveillance.