GSLV-F10 / GISAT-1 mission failure (2021)
India's first attempt to orbit a GEO imaging satellite ended in failure when the cryogenic upper stage of GSLV-F10 failed to ignite after liftoff from Sriharikota. The first two stages performed normally, but the satellite (GISAT-1/EOS-03) was lost.
The satellite crashed into the sea. ISRO formed a failure analysis committee and suspended GSLV launches for fixes.
India's GEO imaging ambitions were set back years. The cryogenic stage has since flown successfully multiple times, including the NISAR mission in July 2025 and now GISAT-1A.
EOS-05 is the direct successor to the lost GISAT-1, and the mission validates the cryogenic upper stage that failed five years ago.
