Failure Analysis Committee Identifies Propellant Leak as Cause of GSLV Failure

GSLV EOS-3 booster on its way to the launch pad. (Credit: ISRO)

BENGALURU, India (ISRO PR) — The GSLV-F10/EOS-03 Mission lifted-off normally from Sriharikota on August 12,2021 at 0543 hrs after a smooth countdown of 26 hours. In the flight, the performance of the first stage (GS1), the strap-on stages (L40) and the second stage (GS2) were satisfactory and in accordance with the pre-flight predictions. However, the onboard computer aborted the mission at 307 seconds into the flight leading to mission failure.

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Indian Rocket Launch Fails, Earth Observation Satellite Lost

GSLV booster on its way to the launch pad. (Credit: ISRO)

SRIHARIKOTA, India — The GSLV-F10 launch took place on Thursday, August 12, 2021 at 0543 IST as scheduled. Performance of first and second stages was normal. However, cryogenic upper stage ignition did not happen due to technical anomaly. The mission couldn’t be accomplished as intended.

EOS-03 was a state-of-the-art agile Earth observation satellite which was to have been placed in a Geosynchronous Transfer Orbit by GSLV-F10. The satellite was to have reached its final geostationary orbit using its onboard propulsion system.

A 4-meter diameter Ogive shaped payload fairing was flown for the first time on this GSLV flight. It was the fourteenth flight of the GSLV rocket. The rocket has a record of eight successes, four failures and two partial failures.

Hit hard by the COVID-19 pandemic, India has only launched four times since the beginning of 2000. The three previous flights during that period were successful. India typically conducts about six launches annually.

India Set to Launch Earth Observation Satellite

GSLV booster on its way to the launch pad. (Credit: ISRO)

SRIHARIKOTA, India (ISRO PR) — Geosynchronous Satellite Launch Vehicle-F10 (GSLV-F10) will launch Earth Observation Satellite, EOS-03 from the Second Launch Pad of Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota. The launch is tentatively scheduled at 0543 Hrs IST [0013 UTC] on Thursday, Aug. 12 [08:13 p.m. EST on Wednesday, Aug. 11], subject to weather conditions.

EOS-03 is a state-of-the-art agile Earth observation satellite which will be placed in a Geosynchronous Transfer Orbit by GSLV-F10. Subsequently, the satellite will reach the final geostationary orbit using its onboard propulsion system.

A 4 metre diameter Ogive shaped payload fairing is being flown for the first time in this GSLV flight. This is the fourteenth flight of GSLV.