RISAT-2BR1


RISAT-2BR1 is a synthetic-aperture radar imaging satellite for reconnaissance built by Indian Space Research Organisation. It is part of India's RISAT series of SAR imaging spacecrafts and fourth satellite in the series. RISAT-2BR1 was launched on 11 December 2019 at 09:55 UTC aboard PSLV-C48 from First Launch Pad of Satish Dhawan Space Centre. It was the 50th launch of Polar Satellite Launch Vehicle and 75th launch from Satish Dhawan Space Centre.

Overview

The RISAT-2BR1 is follow on to RISAT-2B and has an X-band SAR with unfurlable radial rib reflector antenna of 3.6 meter diameter. RISAT-2BR1 can operate in different modes including Very High Resolution imaging modes of 1m x 0.5m resolution and 0.5m x 0.3m resolution with swath of 5 to 10 km.
RISAT-2BR1 was launched aboard PSLV-C48 on 11 December 2019 at 09:55 UTC with nine other ride-sharing commercial satellites from First Launch Pad of SDSC SHAR. Launch vehicle used was QL variant of Polar Satellite Launch Vehicle with four PSOM-XL strap-ons and employed a 195 kg Dual launch Adapter to accommodate primary and secondary payloads. After flight of 16 minutes 27 seconds, RISAT-2BR was separated from PSLV fourth stage and injected into 576 km circular orbit with 37° inclination. After primary payload, DLA-Upper and subsequently nine other co-passenger satellites were separated. RISAT-2BR1 deployed it solar panels within 3 minutes after separation and deployed its 3.6 meter antenna on 0830 UTC, 12 December 2019.
Secondary payloads:
Nine commercial ridesharing satellites weighed 157.6 kg cumulatively.