GSLV-Mk III is the next generation launch vehicle of ISRO capable of launching 4 ton class of satellites to Geosynchronous Transfer orbit (GTO). It is a three-stage vehicle with two solid motor strap-ons (S200), a liquid propellant core stage (L110) and a cryogenic stage (C25). GSLV-Mk III-D1 is the first developmental flight carrying GSAT-19 satellite.

GSAT-19 is the payload for the indigenous GSLV-Mk III-D1 Launcher. The satellite will carry Ka-band and Ku-band payload along with a Geostationary Radiation Spectrometer (GRASP) payload to monitor and study the nature of the charged particles and influence of space radiation on spacecraft and electronic components. GSAT-19 satellite will employ advanced spacecraft technologies including bus subsystem, indigenous Li ion battery, indigenous Bus bars for power distribution, etc.

The satellite is scheduled to be launched during early June 2017 by GSLV-Mk III-D1 Launcher from SDSC SHAR, Sriharikota.