|Names||Radar Imaging Satellite-2BR1|
|Mission type||Earth observation|
Radar imaging satellite
|Mission duration||5 years (planned)|
1 year, 7 months and 16 days (in progress)
|Manufacturer||Indian Space Research Organisation|
|Launch mass||615 kg (1,356 lb) |
|Start of mission|
|Launch date||11 December 2019, 09:55 UTC|
|Rocket||Polar Satellite Launch Vehicle, PSLV-C48|
|Launch site||Satish Dhawan Space Centre, First Launch Pad (FLP)|
|Contractor||Indian Space Research Organisation|
|Entered service||March 2020|
|Reference system||Geocentric orbit|
|Regime||Low Earth orbit|
|Perigee altitude||555 km (345 mi)|
|Apogee altitude||555 km (345 mi)|
|Synthetic Aperture Radar (X-band) (SAR-X)|
RISAT-2BR1 is a synthetic-aperture radar (SAR) imaging satellite built by Indian Space Research Organisation (ISRO). It is part of India's RISAT series of SAR imaging satellite and fourth satellite in the series. RISAT-2BR1 was launched on 11 December 2019 at 09:55 UTC aboard Polar Satellite Launch Vehicle PSLV-C48 from First Launch Pad (FLP) of Satish Dhawan Space Centre. It was the 50th launch of Polar Satellite Launch Vehicle and 75th launch from Satish Dhawan Space Centre.
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 1 x 0.5 m resolution and 0.5 x 0.3 m 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 Satish Dhawan Space Centre, 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 (DLA) to accommodate primary and secondary payloads. After a flight of 16 minutes 27 seconds, RISAT-2BR1 was separated from PSLV fourth stage (PS4) and injected into 576 km circular orbit with 37.0° inclination. After primary payload, DLA 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 08:30 UTC, on 12 December 2019.