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RISAT-2B

From Wikipedia, the free encyclopedia
Indian Earth observation satellite

RISAT-2B
NamesRadar Imaging Satellite-2B
Mission typeEarth observation
Radar imaging satellite
disaster management)
OperatorISRO
COSPAR ID2019-028AEdit this at Wikidata
SATCATno.44233
Websitehttps://www.isro.gov.in/
Mission duration5 years (planned)
5 years, 9 months and 16 days(in progress)
Spacecraft properties
SpacecraftRISAT-2B
BusRISAT
ManufacturerIndian Space Research Organisation
Launch mass615 kg (1,356 lb)
Power2000watts
Start of mission
Launch date22 May 2019, 00:00UTC
RocketPolar Satellite Launch Vehicle-CAPSLV-C46
Launch siteSatish Dhawan Space Centre,First Launch Pad (FLP)
ContractorIndian Space Research Organisation
Entered serviceAugust 2019
Orbital parameters
Reference systemGeocentric orbit
RegimeSun-synchronous orbit
Altitude555 km (345 mi)
Inclination37.0°
Period93.0 minutes
Instruments
Synthetic Aperture Radar (X-band) (SAR-X)

RISAT-2B, orRadar Imaging Satellite-2B is an Indianradarreconnaissance satellite that is part of India'sRISAT programme and the third satellite in the series. It is built byIndian Space Research Organisation (ISRO) to replaceRISAT-2.

Overview

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RISAT-2B satellites will succeed India's ten-year-oldRISAT-2 spacecraft. Equipped withX-band radar imagers, RISAT-2B monitors theEarth day and night, in any weather conditions. RISAT uses a technique called Synthetic Aperture Radar (SAR) to build images of the Earth below it. Signals transmitted from the satellite are reflected from the surface and its echo is recorded when it reaches back to the satellite. These signals can then be processed to build a profile of the ground below. The RISAT constellation is operated by theISRO. While ISRO states the satellites applications as supportingagriculture,forestry anddisaster management, their primary purpose is military surveillance.[1]

RISAT-2B can operate in different modes includingVery 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.[2]

Satellite description

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RISAT-2B's main sensor is an indigenously developedsynthetic-aperture radar (SAR) imaging satellite operating inX-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).[3]

Launch

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It was successfully launched aboard aPolar Satellite Launch VehiclePSLV-C46 launch vehicle at 00:00UTC on 22 May 2019 from theFirst Launch Pad at theSatish Dhawan Space Centre.[4][5]

See also

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References

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  1. ^"Display: RISAT-2B 2019-028A". NASA. 27 April 2021. Retrieved14 May 2021.Public Domain This article incorporates text from this source, which is in thepublic domain.
  2. ^"Earth Observation Satellite RISAT-2B". Press Information Bureau - Government of India. 4 July 2019. Retrieved15 May 2021.
  3. ^"RISAT-2B: Radial Rib Antenna". ISRO. 22 May 2019. Archived fromthe original on 29 May 2019. Retrieved15 May 2021.
  4. ^"PSLV-C46 / Risat-2B mission a success, ISRO places radar imaging earth observation satellite in orbit".The Times of India. 22 May 2019. Retrieved15 May 2021.
  5. ^"India Successfully Launches RISAT-2B Earth-Observation Satellite". SPACE.com. Retrieved10 March 2025.
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