Issue 28

India GISAT-1 (EOS-03) Launch Fails

11 Aug 2021: The Indian Geosynchronous Satellite Launch Vehicle (GSLV) suffered a malfunction of its upper stage during an Aug. 11 launch, causing the loss of an imaging satellite, GISAT-1 (renamed EOS-03). - The GSLV lifted off from the Satish Dhawan Space Centre at 8:15 p.m. Eastern. - The initial phases of the flig…

11 Aug 2021: The Indian Geosynchronous Satellite Launch Vehicle (GSLV) suffered a malfunction of its upper stage during an Aug. 11 launch, causing the loss of an imaging satellite, GISAT-1 (renamed EOS-03).

– The GSLV lifted off from the Satish Dhawan Space Centre at 8:15 p.m. Eastern.

– The initial phases of the flight, including burns by four strap-on boosters and the first and second stages, appeared to go as planned, as did the separation of the rocket’s payload fairing.

– After second stage separation, the upper stage’s cryogenic engine ignited. The stage appeared to start to roll and lose attitude control moments later, based on animations derived from launch vehicle telemetry shown on the webcast by ISRO.

– The EOS-03 satellite and the GSLV CUS third stage reached a -4500 x 140 km x 17.9 deg orbit and impacted the Andaman Sea near the second stage impact zone at about 0023 UTC, 10 minutes after launch from Satish Dhawan Space Centre.

– This was the 14th flight of the GSLV, India’s largest launch vehicle, and the eighth of the Mark 2 version, which has an upper stage with a domestically developed cryogenic engine that uses liquid hydrogen and liquid oxygen.

The first Mark 2 launch, in 2010, failed to reach orbit because of a failure of that upper stage engine, but subsequent launches were successful until this latest flight.

Space is hard. China remains the only nation with a “high resolution” satellite in GEO with Gaufen-4 (40m) and Gaufen-13 (15m).

Issue 28 - India GISAT-1 (EOS-03) Launch Fails

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