Indian space science has progressed significantly since independence. Key developments include:
1) ISRO was established in 1969 to advance India's space program, launching its first satellite, Aryabhata, in 1975 aboard a Soviet rocket.
2) India developed its own launch vehicles like SLV, ASLV, and PSLV to independently launch satellites in the 1970s-1980s. The successful PSLV became India's workhorse launch vehicle.
3) Major satellites included the INSAT series for communication, broadcasting, and meteorology and the IRS series for remote sensing applications in agriculture, resources, disaster management and more.
4) GSLV was successfully developed to launch heavier satellites into