ISRO's GISAT-1A Mission for Real-Time Earth Observation

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Key takeaways

ISRO is set to launch the GISAT-1A (EOS-05) Earth observation satellite in September 2026 onboard the GSLV-F17 rocket.
Stationed in a geostationary orbit 36,000 km above Earth, the satellite provides continuous coverage over the Indian landmass.
The camera system can photograph the entire country every 30 minutes and scan critical focus zones every 5 minutes.
Built with a 10-year lifespan on the I-2K satellite bus, the satellite generates over 2,200 W of solar power for uninterrupted operations.

The Indian Space Research Organisation (ISRO) plans to launch the GISAT-1A (EOS-05) Earth observation satellite in September 2026.
The mission will lift off aboard ISRO's GSLV-F17 launch vehicle.

The GISAT-1A satellite, designated as EOS-05, is an advanced geo-imaging satellite that will operate from a Geostationary Orbit at an altitude of 36,000 km.
Unlike standard remote sensing satellites in Low Earth Orbit, this satellite remains fixed over India to provide continuous surveillance and environmental data.
The Indian Space Research Organisation (ISRO) is the main nodal agency leading this mission.
The satellite will launch using the GSLV Mk-II (Flight F17) rocket, which features an indigenous Cryogenic Upper Stage (CE-7.5) and a 4-metre Ogive payload fairing.
The main objective is providing high-resolution images of India and surrounding oceans to support disaster management, crop monitoring, and national security.

Positioned in a geostationary slot 36,000 km above the equator, the satellite maintains constant line-of-sight visibility over almost the entire Indian landmass during daylight.
It can scan the entire Indian mainland every 30 minutes at a spatial resolution of 42 metres, or zoom into high-priority targets every 5 minutes.
The payload includes a 700 mm Ritchey-Chrétien telescope with multispectral and hyperspectral sensors to track soil minerals, crop stress, and vegetation status.
Built on ISRO's proven I-2K satellite bus, the platform features a steerable antenna and jitter-free pointing mechanisms for fast target switching.
The satellite has a planned operational lifespan of 10 years and relies on multi-junction solar panels generating more than 2,200 W of power.

The mission allows continuous tracking of natural disasters like cyclones, floods, cloudbursts, and forest fires to improve early warning systems.
A successful launch will boost confidence in the GSLV Mk-II platform and its cryogenic engine, supporting future programs like NavIC and Gaganyaan.