Previous Indian observation satellites relied primarily on optical and spectral sensors which were hampered by cloud cover.

RISAT-2 used an Israel Aerospace Industries (IAI) X-band SAR sensor similar to the one employed on TecSAR.

[6][8] RISAT-1 was an indigenously developed radar imaging satellite successfully launched by a PSLV-XL rocket on 26 April 2012 from Satish Dhawan Space Centre, Shriharikota.

[5][9][10][11] The features of RISAT-1 include: RISAT-2B is an indigenously developed Synthetic Aperture Radar (SAR) imaging satellite operating in X Band with 3.6 m radial rib antenna.

It was launched on 11 December 2019 at 3:25 PM IST on board PSLV rocket from Satish Dhawan Space Centre.

[17] The satellite has resolution of 0.35 meters by which two objects separated by distance of 0.35 metres can be distinctly identified.