# EOS-05
**EOS-05**, also known as **GISAT-1A**, is an Indian Earth observation satellite operated by the Indian Space Research Organisation (ISRO) and the first Indian imaging satellite placed into geosynchronous orbit. It was launched on 4 September 2026 at 02:55 IST aboard a GSLV-F17 rocket from the Second Launch Pad of the [Satish Dhawan Space Centre](https://www.edgepedia.org/satish-dhawan-space-centre), SHAR, Sriharikota, and placed into a Sub-Geosynchronous Transfer Orbit (Sub-GTO).[1](https://www.isro.gov.in/Mission_GSLVF17.html) ISRO describes it as a state-of-the-art Earth observation spacecraft.[1](https://www.isro.gov.in/Mission_GSLVF17.html)
| Key fact | Detail |
|---|---|
| Launch | 4 September 2026, 02:55 IST, GSLV-F17 from the Second Launch Pad, Satish Dhawan Space Centre, Sriharikota[1](https://www.isro.gov.in/Mission_GSLVF17.html) |
| Orbit | Sub-Geosynchronous Transfer Orbit at separation; raised to near-geostationary orbit by three LAM engine burns by 7 September 2026[1](https://www.isro.gov.in/Mission_GSLVF17.html) • [2](https://www.isro.gov.in/Orbit_manoeuvring_of_EOS05_spacecraft.html) |
| Mass | 2,367 kg (5,218 lb)[3](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite) |
| Distinction | India's first imaging satellite from geosynchronous orbit, about 35,786 km altitude[1](https://www.isro.gov.in/Mission_GSLVF17.html) • [3](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite) |
| Predecessor | Replaces EOS-03/GISAT-1, lost in the August 2021 GSLV-F10 launch failure[4](https://nextspaceflight.com/launches/details/1508/) |
| Bus | ISRO I-2K satellite bus[5](https://digitallylearn.com/current-affairs/eos-05-gslv-f17-geosynchronous-imaging-satellite-2026/) |
| Design lifetime | 2026 to 2033 per the WMO OSCAR satellite register[6](https://space.oscar.wmo.int/satellites/view/eos_05_gisat_1a) |
## Launch vehicle and mission profile
GSLV-F17 was the 19th flight of India's Geosynchronous Satellite Launch Vehicle, using the 4 m diameter ogive composite version of the payload fairing.[1](https://www.isro.gov.in/Mission_GSLVF17.html) The GSLV Mark II is a three-stage rocket 52 meters (170 feet) tall; by the time of this flight it had flown 13 times with 11 successes.[3](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite) The rocket lifted off at 2:55 a.m. [Indian Standard Time](https://www.edgepedia.org/indian-standard-time) and separated EOS-05 into its intended Sub-GTO about 18 minutes 40 seconds later.[3](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite) • [7](https://www.techtimes.com/articles/326730/20260904/isro-eos-05-places-first-hyperspectral-earth-surface-imager-geostationary-orbit.htm)
## Orbit raising
After separation, the spacecraft raised its orbit with three liquid apogee motor (LAM) burns. The planned first maneuver, with a burn duration of 5406.4 seconds, was completed on 5 September 2026 at 20:19 hrs.[2](https://www.isro.gov.in/Orbit_manoeuvring_of_EOS05_spacecraft.html)
## Purpose and capabilities
[Geosynchronous orbit](https://www.edgepedia.org/geosynchronous-orbit) lies about 35,786 km up, where a spacecraft's orbital speed matches [Earth's rotation](https://www.edgepedia.org/earths-rotation), allowing it to hover over a fixed patch of the planet.[3](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite) From this perch EOS-05 can maintain persistent coverage of the [Indian subcontinent](https://www.edgepedia.org/indian-subcontinent), including remote border areas, strategic assets, severe weather, and environmental events; it is intended for both civilian and military applications.[3](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite) Reported uses of India's geostationary imaging capability include coastal planning, such as monitoring shoreline change and erosion.[8](https://aitimeline.in/india-earth-observation-satellite-timeline-1988-2026-7538/)
Most of India's Earth-observation fleet, including [Cartosat](https://www.edgepedia.org/cartosat), Resourcesat, and [RISAT](https://www.edgepedia.org/risat) satellites, operates from much lower orbits; EOS-05 is the first Indian imager placed in geosynchronous orbit.[8](https://aitimeline.in/india-earth-observation-satellite-timeline-1988-2026-7538/) TechTimes reported that the mission placed the first hyperspectral Earth surface imager in geostationary orbit.[7](https://www.techtimes.com/articles/326730/20260904/isro-eos-05-places-first-hyperspectral-earth-surface-imager-geostationary-orbit.htm) The satellite is built on ISRO's I-2K bus, a proven platform, with the camera it carries described as the new part of the mission.[5](https://digitallylearn.com/current-affairs/eos-05-gslv-f17-geosynchronous-imaging-satellite-2026/)
## Background
India first attempted to place an Earth-observing satellite in geosynchronous orbit in August 2021, when a GSLV Mark II launched EOS-03 (GISAT-1); the rocket's third stage suffered an anomaly and the satellite was lost.[3](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite) • [4](https://nextspaceflight.com/launches/details/1508/) EOS-05/GISAT-1A was built to replace it.[4](https://nextspaceflight.com/launches/details/1508/) The GSLV returned to flight in May 2023 and entered this launch on a streak of five consecutive successful launches.[3](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite) The 4 September 2026 liftoff was India's third orbital mission of that year, following a failed PSLV flight in January and the private Skyroot Aerospace Vikram-1 launch in July.[3](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite)
## References
1. [GSLV-F17/EOS-05 Mission, ISRO](https://www.isro.gov.in/Mission_GSLVF17.html)
2. [Orbit manoeuvring of EOS-05 spacecraft, ISRO](https://www.isro.gov.in/Orbit_manoeuvring_of_EOS05_spacecraft.html)
3. [India sends Earth-imaging satellite toward geosynchronous orbit in milestone launch, Space.com](https://www.space.com/space-exploration/launches-spacecraft/gslv-mark-ii-eos-05-launch-first-indian-geo-earth-observing-satellite)
4. [EOS-05 (GISAT-1A) | GSLV Mk II, Next Spaceflight](https://nextspaceflight.com/launches/details/1508/)
5. [EOS-05 (GISAT-1A): India's Geosynchronous Imaging Satellite, Digitally Learn](https://digitallylearn.com/current-affairs/eos-05-gslv-f17-geosynchronous-imaging-satellite-2026/)
6. [WMO OSCAR | Satellite: EOS 05 (GISAT-1A)](https://space.oscar.wmo.int/satellites/view/eos_05_gisat_1a)
7. [ISRO EOS-05 Places First Hyperspectral Earth Surface Imager in Geostationary Orbit, TechTimes](https://www.techtimes.com/articles/326730/20260904/isro-eos-05-places-first-hyperspectral-earth-surface-imager-geostationary-orbit.htm)
8. [India Earth Observation Satellite Timeline: IRS to EOS-05, AITimeline](https://aitimeline.in/india-earth-observation-satellite-timeline-1988-2026-7538/)
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*Topic: Encyclopedia › Technology and the built world › Transport and spaceflight › Spaceflight › Satellites › Satellites by function › Earth observation satellites*
*Initially written Sep 17, 2026 · Reviewed: Oct 15, 2026 · Edited: Oct 11, 2026; Oct 15, 2026 · Last review: Oct 15, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license