GSAT-19 is an experimental GEO satellite manufactured and developed by ISRO. Its main purpose is to conduct tests of I-6K satellite modular bus along with different devices useful in developing future communication satellites. ISRO will perform tests of such systems like electric propulsion, Lithium onboard batteries or deployable radiators. Spacecraft weighs 3200 kg and is powered by two deployable solar arrays. Satellite will be delivered to orbit on atop of GSLV launch vehicle in Mark III version.