 The Indian Space Research Organisation (ISRO) successfully executed the GSLV-F17 mission on September 4, 2026, at 2:55 am IST, launching from the Satish Dhawan Space Centre in Sriharikota. The mission carried the EOS-05 satellite (formerly GISAT-1A), a 2,367 kg Earth observation spacecraft, and successfully placed it into a sub-geosynchronous transfer orbit. This launch marks a significant spaceflight milestone as India’s first dedicated imaging satellite to operate from a geosynchronous orbit, providing persistent, near-real-time monitoring of the Indian landmass and surrounding regions from an altitude of approximately 36,000 kilometers.
ISRO GSLV-F17 Mission Highlights:Persistent Monitoring: Unlike low-Earth orbit satellites that only see a region during specific passes, EOS-05 maintains a fixed position relative to Earth’s rotation, allowing for continuous observation. Rapid Revisit Capability: The satellite can image critical disaster spots every 5 to 10 minutes and provide a full scan of the entire Indian subcontinent every 30 minutes. Advanced Imaging Suite: It is equipped with a 700 mm Ritchey–Chrétien optical telescope and a hyperspectral sensor suite (HyS-VNIR and HyS-SWIR) capable of analyzing vegetation health, atmospheric aerosols, and mineralogy. Disaster and Strategic Utility: The “eye in the sky” will play a vital role in disaster management—tracking cyclones, forest fires, and floods—while also providing strategic surveillance over remote border areas like the LAC and LoC. Launcher Reliability: This 19th flight of the GSLV—traditionally nicknamed the “naughty boy” due to past inconsistencies—utilized an indigenous cryogenic upper stage, demonstrating the vehicle’s growing dependability for high-value payloads. Recovery from Setbacks: This success provides a major boost to ISRO’s confidence following the loss of the EOS-03 satellite in 2021 and the recent grounding of the PSLV rocket for investigations. |
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