Sriharikota, India — September 2026: The Indian Space Research Organisation (ISRO) has successfully launched India’s first dedicated Earth observation satellite designed to operate from a geosynchronous orbit, marking a significant milestone in the country’s space and remote-sensing capabilities.
The Advanced Earth Observation Satellite-05 (EOS-05) was launched aboard the GSLV-F17 rocket from the Satish Dhawan Space Centre in Sriharikota during the early hours of Friday. The mission is expected to provide high-value, near-real-time imagery that can support applications ranging from agriculture and infrastructure planning to disaster management and strategic monitoring.
GSLV-F17 Lifts Off After 27-Hour Countdown
The countdown for the mission began at 11:30 p.m. on Wednesday and continued for approximately 27 hours before the launch.
At 2:55 a.m. on Friday, the 51.7-metre-tall GSLV-F17 lifted off from the second launch pad at Sriharikota, carrying the 2,367-kilogram EOS-05 satellite.
Despite the pre-dawn timing and rain, members of the public gathered at the spaceport to witness the launch. Approximately 18 minutes after liftoff, the satellite was successfully injected into its designated sub-geosynchronous transfer orbit, ISRO confirmed.
The successful deployment represents an important achievement for India’s space programme, particularly following previous setbacks involving Earth observation missions.
EOS-05: A New ‘Eye in the Sky’
EOS-05 has been described by scientists associated with the mission as an “eye in the sky”, reflecting its intended role in delivering timely Earth imagery from a much higher orbit than conventional low-Earth-orbit observation satellites.
The satellite is designed to eventually operate at an altitude of approximately 36,000 kilometres above Earth, where it can synchronize its orbital period with Earth’s rotation.
This positioning is expected to provide continuous and strategically valuable observations of large geographical areas. Such imagery could assist authorities and agencies in monitoring agricultural activity, assessing natural disasters, supporting infrastructure development and responding to emergencies.
GSLV-F17 Marks Another Milestone for India’s Heavy-Lift Launch Capability
The mission marks the 19th flight of India’s Geosynchronous Satellite Launch Vehicle (GSLV).
The three-stage GSLV-F17 stands approximately 51.7 metres tall and has a liftoff mass of about 420.5 tonnes. Its third stage uses a cryogenic engine, a technology that plays a crucial role in enabling the vehicle to place heavier payloads into higher-energy orbits.
With EOS-05 weighing more than two tonnes, the mission demonstrates India’s continuing efforts to strengthen its ability to deploy sophisticated Earth observation spacecraft into advanced orbital positions.
Mission Follows Earlier EOS-03 Setback
The successful launch of EOS-05 also carries significance because the mission follows the unsuccessful GSLV-F10/EOS-03 mission in 2021.
During that mission, an onboard computer automatically aborted the flight approximately 307 seconds after liftoff. A subsequent investigation into the flight data identified an anomaly in the Cryogenic Upper Stage as the cause of the failure.
The latest mission therefore represents an important step in ISRO’s continued efforts to improve launch reliability and strengthen confidence in its GSLV platform.
ISRO’s Recent Launch Challenges
The EOS-05 mission comes after a challenging period for India’s launch programme.
In January, ISRO’s PSLV-C62 mission, which was carrying 16 satellites, failed to place its payloads into the intended orbit after an anomaly occurred in the rocket’s third stage.
Another setback occurred in May 2025 during the PSLV-C61/EOS-09 mission, which was unsuccessful following an issue associated with motor pressure and a subsequent drop in chamber pressure.
Against this backdrop, the successful GSLV-F17 mission provides a significant boost to ISRO’s ongoing efforts to maintain launch reliability and advance India’s Earth observation infrastructure.
A Strategic Step Forward for Earth Observation
Once EOS-05 is fully operationalized, ISRO expects the satellite to become India’s first dedicated imaging satellite operating from a geosynchronous orbit.
Its ability to provide timely imagery could strengthen India’s capabilities in areas where rapid access to accurate Earth-based information is critical. From monitoring crops and natural resources to supporting disaster response and strategic applications, the satellite is expected to expand the country’s capacity to observe and analyze large regions from space.
Following the successful mission, ISRO Chairman V. Narayanan described the precise injection of EOS-05 into its intended orbit as a major achievement and emphasized the strategic importance of the satellite’s capabilities.
The successful launch reinforces India’s growing capabilities in advanced Earth observation and demonstrates ISRO’s continued progress in developing reliable launch systems and sophisticated space-based infrastructure.
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