<P> The ASLV orbital launcher was integrated vertically, beginning with motor and subassembly preparations in the Vehicle Integration Building (VIB) and completed on the pad within the 40 m tall Mobile Service Structure . The first ASLV launch from SHAR took place in 1987 and resulted in a failure . Eventually, out the four ASLV launches from 1987--94, only one was successful . </P> <P> The PSLV launch complex was commissioned during 1990 . It has a 3,000 tonne, 76.5 m high Mobile Service Tower (MST) which provides the SP - 3 payload clean room . The solid propellant motors for the PSLV are processed by SHAR, which also carries out launch operations . The first launch of the PSLV took place on 20 September 1993 . </P> <P> The Centre has two operational orbital launch pads . SHAR is ISRO's satellite launching base and additionally provides launch facilities for the full range of Rohini sounding rockets . The Vehicle Assembly, Static Test and Evaluation Complex (VAST, previously STEX) and the Solid Propellant Space Booster Plant (SPROB) are located at SHAR for casting and testing solid motors . The site also has a Telemetry, Tracking, Range Instrumentation, & Control centre for Range Operation (RO), Liquid Propellant Storage and Servicing Facilities (LSSF), the Management Service Group and Sriharikota Common Facilities . The PSLV launch complex was commissioned in 1990 . It has a 3,000 tonne, 76.5 m high Mobile Service Tower (MST) which provides the SP - 3 payload clean room . </P> <P> The solid propellant space booster plant (SPROB) processes large size propellant grains for the satellite launch vehicles . The Vehicle Assembly & Launching Facility (VALF), Solid Motor Preparation & Environmental Testing Facility (SMP&ETF) tests and qualifies different types of solid motor for launch vehicles . The control centre at SHAR houses computers and data processing, closed circuit television, real - time tracking systems and meteorological observation equipment . It is linked to eight radars located at Sriharikota and the five stations of ISRO's Telemetry, Tracking & Command Network (ISTRAC). </P>

Where is india's primary satellite launching station