Full Breakdown
ISRO Prepares GSLV-F17 Launch of EOS-05, India’s First Geosynchronous Imaging Satellite
9/4/2026, 4:12:45 AM
Mission Overview
The Indian Space Research Organisation (ISRO) has scheduled the launch of the GSLV-F17/EOS-05 mission for September 4 2026 at 02:55 AM IST. The three-stage Geosynchronous Satellite Launch Vehicle will lift off from the Second Launch Pad at the Satish Dhawan Space Centre (SDSC-SHAR) in Sriharikota and place EOS-05 into a Sub-Geosynchronous Transfer Orbit (Sub-GTO) for maneuver to its final geosynchronous orbit.
Background and Context
EOS-05 is ISRO’s first imaging satellite designed for geosynchronous operation, differing from conventional low-Earth-orbit imagers. The mission follows the GSLV-F10 launch that failed on August 12 2021 after a cryogenic upper-stage anomaly. GSLV-F17 is the 19th flight of India’s GSLV family and tests the vehicle’s reliability after recent PSLV setbacks.
Timeline
- August 31 2026: ISRO announced online registration for launch-viewing enthusiasts at the Launch View Gallery, SDSC-SHAR.
- September 4 2026: Launch of GSLV-F17 carrying EOS-05; live streaming begins at 02:25 AM IST.
- Future: ISRO plans seven launches through March 2027, including the uncrewed G1 flight of the Gaganyaan programme.
Technical Details and Data
- Launch vehicle: GSLV-F17 (Mk II) stands 51.7 m tall, has a liftoff mass of 420.5 t, and uses a four-metre-diameter ogive composite payload fairing.
- Orbit insertion: The vehicle will deliver EOS-05 to Sub-GTO; the satellite will then raise its orbit to a circular geosynchronous orbit at roughly 36,000 km altitude.
- Satellite capabilities: From geosynchronous orbit EOS-05 can repeatedly image large swaths of India, supporting monitoring of cyclones, floods, forest fires and other rapidly developing events. Data are intended for disaster-management agencies, weather forecasters, agricultural planners and security services.
Why It Matters
Placing an imaging payload in geosynchronous orbit expands India’s remote-sensing portfolio by providing continuous, wide-area coverage that complements existing low-Earth-orbit assets. The mission demonstrates ISRO’s ability to launch heavy, advanced satellites to high-energy orbits, reinforcing strategic autonomy in space-based Earth observation and restoring confidence in the GSLV platform after the 2021 EOS-03 failure.
Official Statements & Responses
ISRO confirmed live streaming will start at 02:25 AM IST on launch day and invited the public to register for viewing the lift-off from the Launch View Gallery. Officials emphasized that EOS-05 will be the first Indian imaging satellite to operate from a geosynchronous orbit, highlighting its role in disaster-response and resource monitoring.
What’s Next
Viewers can register online to attend the launch at the SDSC-SHAR gallery, and the mission will be streamed live on ISRO’s official channels. After September, ISRO’s schedule includes additional GSLV and Gaganyaan missions through early 2027, continuing the push to expand India’s space-based observation and exploration programmes.
