EDUSAT (GSAT-3) was India's first satellite made only for education. Launched on the first operational GSLV in September 2004, it linked classrooms by two-way satellite communication.
No longer operational, according to the public satellite catalogue.
EDUSAT was meant for teaching at a distance, from school classes to higher education. It gave classrooms a two-way satellite link, so learners could talk back as well as watch.
It carried six extended C-band transponders, five Ku-band transponders with spot beams aimed at regions of India, and one Ku-band transponder covering the whole country. A 1.2 m antenna reflector shaped the Ku-band spot beams.
EDUSAT was built on ISRO's standard I-2K satellite bus. It weighed 1,950 kg at launch, of which about 820 kg was dry mass. Four solar panels gave 2,040 W at the end of its life, and it was designed to last at least seven years.
GSLV-F01, the third GSLV flight and the first operational one, launched EDUSAT from Sriharikota on 20 September 2004. From the transfer orbit, the satellite fired its liquid apogee motor in stages to reach geostationary orbit.
It was parked at 74° E, sharing the slot with Kalpana-1 and INSAT-3C.