Know all about earth observation satellite RISAT-2B

RISAT 2B, an all-season satellite, launched on May 22, 2019, from Sriharikota, is a Radar imaging earth observation satellite developed by ISRO.

Know all about earth observation satellite RISAT-2B
know-all-about-earth-observation-satellite-risat2b

Know all about earth observation satellite RISAT-2B

RISAT 2B, an all-season satellite, launched on May 22, 2019, from Sriharikota, is a Radar imaging earth observation satellite developed by ISRO. After eight years of the last RISAT launch, RISAT-2B will expand the RADAR imaging satellite fleet in space. 

“Radar imaging satellites are at a premium in the Earth observation scene”- said, Mukund Rao, former Deputy Director of Earth Observation Systems at ISRO. 

Optical imaging or regular remote sensing satellites are unable to work in cloudy or dark conditions. Since they have a passive sensor and relies heavily on light-dependent camera, they cannot perceive hidden or surreptitious objects on the ground ( in dark or clouds). 

On the other hand SARs i.e. Synthetic aperture radar is an active sensor i.e. they have their own source of energy and don’t rely on sunlight to see features. 

RISAT 2B- ready to monitor earth in all seasons

So in short RISAT 2B will be able to measure pulses of our planet in darkness, cloud, rain etc. This feature makes it suitable for security forces and disaster relief agencies.  

PSLV-C46 is the 48th mission of PSLV. RISAT-2B was released into the orbit around 15 minutes after the lift-off. It is going to replace the RISAT-2, which was successfully launched in 2009. PSLV has also achieved a record of lifting 50 tonnes of payload into space by placing more than 350 satellites. 
“This is a very, very important mission for India. It is an excellent satellite with hi-fi earth observation ( capabilities), ” said ISRO Chairman K Sivan. 

Marked as the third launch by ISRO in 2019, it is also the 72nd  launch vehicle mission from Sriharikota and also the 36th launch from the first launch pad.

Specifications

•    Lift off weight- 615 kg
•    Altitude- 557 km
•    Payload X- Band radar
•    Inclination- 37 degrees
•    Mission life- 5 years
•    Launch vehicle- PSLV-C46
•     A 3.6m unfoldable and deployable radial rib antenna. 

Applicability

•    Support in disaster management
•    Forestry Studies and monitoring
•    Agricultural field ( crop estimation)
•    Land use, geology.
•    Flood and cyclone monitoring. 
•    Military applications. 

Parts of the series

RISAT-2 was launched on April 20, 2009, and RISAT-1 was launched on April 26, 2012. They had a five-year mission life. According to ISRO chairman, K. Sivan, many RISATs have been planned. RISAT-2B is to be followed by RISAT-2BR1, 2BR2, RISAT-1A, 1B, 2A, and so on. 

Watch Video: ISRO's RISAT-2B Satellite