# ISRO launches EOS-05 satellite mission

> Live situation record from CLSTR: https://clstr.news/situations/isro-eos-05-satellite-launch-mission
> Updated: 2026-09-03T17:37:19.000Z. Sources: 53. Developments: 3.

On September 4, 2026, the Indian Space Research Organisation (ISRO) successfully launched the EOS-05 Earth observation satellite using the GSLV-F17 rocket from the Satish Dhawan Space Centre. The launch occurred at 2:55 AM, and the satellite was placed into its intended Sub-Geosynchronous Transfer Orbit (Sub-GTO) approximately 18 minutes later.

This mission marks the 19th flight of the Geosynchronous Satellite Launch Vehicle (GSLV) Mk II and represents the heaviest payload ever carried by the vehicle into a GTO or sub-GTO orbit. As India’s first imaging satellite to operate from a geosynchronous orbit, EOS-05 will maintain a fixed position approximately 36,000 kilometers above the Indian subcontinent. ISRO Chairman V Narayanan and Mission Director Thomas Kurian confirmed the satellite was precisely placed into its orbit and that its status is normal with solar panels successfully deployed.

The 2,367 kg spacecraft is equipped with a 700mm telescope capable of collecting data across visible, near-infrared, and short-wave infrared bands. It is expected to provide high-resolution imagery every 30 minutes, with intervals potentially reduced to five minutes for critical areas. EOS-05 serves as a replacement for the GISAT-1A satellite lost during a launch failure in 2021. Prime Minister Narendra Modi described the achievement as a reflection of India’s growing space sector capabilities and the strengthening partnership between ISRO and domestic industry. The satellite is intended to provide continuous, real-time monitoring for disaster management—including floods, cyclones, and forest fires—while also supporting agricultural assessments, national security, and environmental monitoring.

## Claims

- ISRO successfully launched the GSLV-F17 rocket carrying the EOS-05 satellite. (corroborated by 40 sources)
- The launch took place at 2:55 AM on September 4 from the Satish Dhawan Space Centre in Sriharikota. (corroborated by 39 sources)
- The EOS-05 satellite was placed into a Sub-Geosynchronous Transfer Orbit (Sub-GTO). (corroborated by 35 sources)
- EOS-05 is India’s first imaging satellite to operate from a geosynchronous orbit. (corroborated by 28 sources)
- The GSLV-F17 mission marks the 19th flight of the Geosynchronous Satellite Launch Vehicle. (corroborated by 28 sources)
- EOS-05 is the heaviest satellite ever carried by a GSLV. (corroborated by 15 sources)
- The EOS-05 satellite is intended to replace the GISAT-1A satellite lost in 2021. (corroborated by 10 sources)
- The GSLV-F17 rocket is 51.7 meters tall and weighed approximately 420.5 tonnes at lift-off. (corroborated by 9 sources)
- ISRO aims to conduct six more launches during this fiscal year. (corroborated by 3 sources)
- The successful launch follows a period of technical reviews after previous PSLV mission anomalies. (corroborated by 2 sources)

## Timeline

### 2026-09-03: ISRO launches EOS-05 satellite via GSLV-F17 rocket

ISRO successfully launched the EOS-05 satellite via the GSLV-F17 rocket. As India’s first imaging satellite in geosynchronous orbit, it will provide high-frequency monitoring for disaster management and more.

52 sources. https://clstr.news/cluster/isro-prepares-gslv-f17-mission-to-launch-eos-05-satellite

### 2026-09-01: ISRO to launch EOS-05 satellite via GSLV-F17 on September 4

ISRO will launch the EOS-05 Earth observation satellite via the GSLV-F17 rocket on September 4 from Sriharikota to monitor natural disasters and land changes from a high-altitude orbit.

5 sources. https://clstr.news/cluster/isro-to-launch-eos-05-satellite-via-gslv-f17-on-september-4

### 2026-08-29: ISRO to launch EOS-5 satellite via GSLV F17 rocket on September 4

ISRO plans to launch the EOS-5 earth observation satellite via a GSLV F17 rocket on September 4 to provide continuous monitoring of natural disasters and maritime regions from geostationary orbit.

2 sources. https://clstr.news/cluster/isro-to-launch-eos-5-satellite-via-gslv-f17-rocket-on-september-4

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Cite as: ISRO launches EOS-05 satellite mission. CLSTR, https://clstr.news/situations/isro-eos-05-satellite-launch-mission