|Names||Radar Imaging Satellite-2B|
|Mission type||Radar imaging|
(Reconnaissance and disaster management)
|Mission duration||Planned: 5 years |
Elapsed: 1 year, 8 months, 3 days
|Launch mass||615 kg (1,356 lb)|
|Start of mission|
|Launch date||22 May 2019, 00:00 UTC|
|Launch site||Satish Dhawan, FLP|
|Reference system||Geocentric orbit|
|Altitude||555 km (345 mi)|
RISAT-2B, or Radar Imaging Satellite-2B is an Indian radar reconnaissance satellite that is part of India's RISAT programme and the third satellite in the series. It is built by Indian Space Research Organisation (ISRO) to replace RISAT-2. It was successfully launched aboard a Polar Satellite Launch Vehicle (PSLV-C46) launch vehicle at 00:00 UTC on 22 May 2019 from the First Launch Pad at the Satish Dhawan Space Centre.
The RISAT constellation is operated by the ISRO. While ISRO states the satellites applications as supporting agriculture, forestry and disaster management, their primary purpose is military surveillance.
RISAT-2B can operate in different modes including Very High Resolution Radar (VHRR) imaging modes of 1 × 0.5 m resolution and 0.5 × 0.3 m resolution. It is placed in an inclined orbit for better revisit rates over area of interest. Being a radar imaging satellite, RISAT-2B can image during day or night and in all weather conditions.
RISAT-2B's main sensor is an indigenously developed synthetic-aperture radar (SAR) imaging satellite operating in X-band with 3.6 m radial rib antenna. The satellite is utilized for high resolution spot imaging of locations of interest and it has a mass of 615 kg (1,356 lb).