| RISAT-2BR1 | |
| Names List: | Radar Imaging Satellite-2BR1 |
| Mission Type: | Earth observation Radar imaging satellite |
| Operator: | ISRO |
| Cospar Id: | 2019-089F |
| Satcat: | 44857 |
| Website: | https://www.isro.gov.in/ |
| Mission Duration: | 5 years (planned) (in progress) |
| Spacecraft: | RISAR-2BR1 |
| Spacecraft Bus: | RISAT |
| Manufacturer: | Indian Space Research Organisation |
| Launch Mass: | [1] |
| Power: | 2 kW |
| Launch Date: | 11 December 2019, 09:55 UTC |
| Launch Rocket: | Polar Satellite Launch Vehicle, PSLV-C48 |
| Launch Site: | Satish Dhawan Space Centre, First Launch Pad (FLP) |
| Launch Contractor: | Indian Space Research Organisation |
| Entered Service: | March 2020 |
| Orbit Reference: | Geocentric orbit |
| Orbit Regime: | Low Earth orbit |
| Orbit Inclination: | 37.0° |
| Orbit Period: | 90.0 minutes |
| Apsis: | gee |
| Instruments: | Synthetic Aperture Radar (X-band) (SAR-X) |
| Programme: | Earth observation satellites series |
| Previous Mission: | Cartosat-3 |
| Next Mission: | RISAT-2BR2 (EOS-01) |
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.[2] [3] It was the 50th launch of Polar Satellite Launch Vehicle and 75th launch from Satish Dhawan Space Centre.[4] [5]
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.[6] 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 [7] with swath of 5 to 10 km.[8]
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.[11] [2]
Nine commercial ridesharing satellites weighed 157.6 kg cumulatively.[10] [12]