ISRO's rocket development followed a progression in payload capacity: - SLV-3 (first successful launch 1980): Designed to carry payloads up to ~40 kg to Low Earth Orbit (LEO). - ASLV (first successful launch 1992): An augmentation of SLV-3, designed to carry payloads up to ~150 kg to LEO. - PSLV (first successful launch 1994): Capable of carrying payloads up to ~1750 kg to Sun-Synchronous Polar Orbit (SSPO) and much higher to LEO. The XL version has enhanced capability. - GSLV (first successful launch 2001): Designed primarily to launch satellites into Geosynchronous Transfer Orbit (GTO) with payload capacity of ~2500 kg (GSLV Mk II) and up to ~4000 kg (GSLV Mk III) to GTO, and even higher to LEO.