Augmented Satellite Launch Vehicle (ASLV) was developed to
act as a low cost intermediate vehicle to demonstrate and validate critical
technologies. With a lift off weight of 40 tonnes, the 23.8 m tall ASLV was
configured as a five stage, all-solid propellant vehicle, with a mission of
orbiting 150 kg class satellites into 400 km circular orbits. The strap-on
stage consisted of two identical 1m diameter solid propellant motors, Under the
ASLV programme four developmental flights were conducted.
The first developmental flight took place on March 24, 1987 and the second on
July 13, 1988. ASLV-D3 was successfully launched on May 20, 1992, when SROSS-C
(106 kg) was put into an orbit of 255 x 430 km. ASLV-D4, launched on May 4,
1994, orbited SROSS-C2 weighing 106 kg. It had two payloads, Gamma Ray Burst
(GRB) Experiment and Retarding Potentio Analyser (RPA) and functioned for seven
years. ASLV provided valuable inputs for further development.