Issue 66

India: Second Successful SSLV Launch

India's second SSLV demonstration succeeded on 9 February 2023, placing EOS-07, AzaadiSAT-2 and Janus-1 into low Earth orbit.

9 Feb 2023: India successfully launched its Small Satellite Launch Vehicle and placed three satellites into a circular 450km low-Earth orbit at 37.2° inclination. The mission lasted about fifteen minutes from liftoff to final spacecraft separation. Launch Video.

– The demonstration mission carried ISRO’s EOS-07 Earth-observation satellite plus the smaller AzaadiSAT-2 and Janus-1 spacecraft.

– SSLV is designed to provide lower-cost, increasingly responsive access to space for small-satellite missions.

– The first SSLV mission in Aug 2022 failed to achieve a stable orbit after a stage-separation issue, leading to vehicle changes before the second demonstration.

– SSLV is a four-stage vehicle with three solid-propellant stages followed by a liquid-propellant Velocity Trimming Module for precise orbital insertion.

– The vehicle supports multiple mounting configurations and can carry a single satellite up to about 500kg to a 500km planar orbit or approximately 300kg to sun-synchronous orbit.

– India planned dedicated SSLV launch infrastructure at a new spaceport near Kulasekharapatnam, providing more direct access to polar orbits without payload-limiting dog-leg trajectories.

SSLV-D2 / EOS-07 launch vehicle.

SSLV-D2 mission and vehicle infographic.