The RISAT-2B satellite, launched by the Indian Space Research Organisation (ISRO) Wednesday morning, adds to India’s capability to observe the earth in all weathers and all conditions. The RISAT, or radar imaging satellite, is equipped with a sensor known as ‘synthetic aperture radar’, that takes what are known as ‘radar images’.
Because the very large wavelength radio waves are not obstructed by clouds, dust or similar other obstacles in the atmosphere, they produce reliable images during day and night and all seasons.
Two satellites in RISAT series have earlier been launched by ISRO. RISAT-2 was the first one to be launched, in 2009, while RISAT-1, which had got delayed, was launched only in 2012. RISAT-1 is no longer operational.
After a very long time, ISRO’s PSLV rocket was used to launch just one satellite into space. In recent times, ISRO has been launching multiple satellites at one go.