NamesRadar Imaging Satellite-2B
Mission typeRadar imaging
(Reconnaissance and disaster management)
COSPAR ID2019-028A
SATCAT no.44233
Mission durationPlanned: 5 years
Elapsed: 1 year, 10 months, 23 days
Spacecraft properties
Launch mass615 kg (1,356 lb)
Power2000 watts
Start of mission
Launch date22 May 2019, 00:00 UTC
RocketPSLV C46
Launch siteSatish Dhawan, FLP
Orbital parameters
Reference systemGeocentric orbit
RegimeSun-synchronous orbit
Altitude555 km (345 mi)
Period93.0 minutes

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.[1][2]


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.[3]

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.[4]


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).[5]

See also


  1. ^ "PSLV-C46/Risat-2B mission a success, ISRO places radar imaging earth observation satellite in orbit". timesofindia.indiatimes.com. The Times of India. Retrieved 4 December 2019.
  2. ^ "India Successfully Launches RISAT-2B Earth-Observation Satellite". space.com. Space.com. Retrieved 4 December 2019.
  3. ^ "Display: RISAT-2B 2019-028A". NASA. 14 May 2020. Retrieved 18 November 2020. This article incorporates text from this source, which is in the public domain.
  4. ^ "Earth Observation Satellite RISAT-2B". pib.nic.in. Delhi: Press Information Bureau - Government of India. 4 July 2019. Retrieved 18 November 2020.
  5. ^ "RISAT-2B: Radial Rib Antenna". isro.gov.in. ISRO. Retrieved 4 December 2019.