EOS-05

GISAT-1A
GISAT-1A in the clean room before encapsulation
NamesEOS-05 / GISAT-1A
Mission typeEarth observation
OperatorISRO
COSPAR ID2026-202A Edit this at Wikidata
SATCAT no.100607Edit this on Wikidata
Websitehttps://www.isro.gov.in/Mission_GSLVF17.html
Spacecraft properties
SpacecraftGISAT
BusI-2K
ManufacturerISRO
Launch mass2,367 kg (5,218 lb)
Start of mission
Launch date3 September 2026, 21:25 UTC
RocketGSLV Mk II (F17)
Launch siteSatish Dhawan Space Centre, SLP
ContractorISRO
Orbital parameters
Reference systemGeocentric orbit
RegimeGeosynchronous orbit
← EOS-N1
← GISAT-1
GISAT-2 →

EOS-05 (also known as GISAT-1A) is an Indian Earth observation satellite. It is the second satellite in the GISAT series produced by ISRO. The satellite aims to improve the existing remote sensing capabilities.

GISAT-1A in deployed configuration

Objectives

GISATs image in multi-spectral and hyper-spectral bands to provide near real-time pictures of large areas of India, under cloud-free conditions, at frequent intervals which is, selected field image in every 5 minutes and entire Indian landmass image every 30 minutes at 42 metres (138 ft) spatial resolution.

These near real-time observations serve for monitoring of natural disasters like cyclones, floods, cloudbursts, and forest fires, as well as for agricultural assessment and security surveillance.

Instruments

Imaging capabilities of GISAT-1A
Band Channels Ground Resolution(m) Range(μm)
Multispectral (VNIR) 6 42 0.45 – 0.875
Hyperspectral (VNIR) 158 318 0.375 – 1.0
Hyperspectral (SWIR) 256 191 0.9 – 2.5

Launch

GISAT-1A was launched from Launchpad 2 of the Satish Dhawan Space Centre aboard the GSLV-F17 mission at 2:55 am IST on 4 September 2026. The satellite was placed at the intended Sub-Geosynchronous Transfer Orbit (Sub-GTO) about 18 minutes after lift-off. At 2,637 kg, the satellite is the heaviest satellite launched by GSLV.

On 5 and 6 September, the satellite fired its Liquid Apogee Motor (LAM) engine twice for 5,406.4 seconds (about 90 minutes) until 8:19 pm IST and 5 minutes to reach orbits at 20,000 km × 31,129 km and 35,786 km, respectively. The satellite was originally present at an altitude of 171 km.

On 7 September, the third and final orbit raising manoeuvre to reach its intended geosynchronous orbit with altitudes ranging between 34,903 km × 35,884 km. The LAM engine fired for 1247 seconds until 8:47 pm IST. The health and systems of the satellite will be monitored for the next few days after which the imaging systems will be activated.

References

  1. ↑ Mukunth, Vasudevan (19 August 2026). "All eyes on GISAT-1A mission as ISRO aims to mend faulty launch streak". The Hindu. ISSN 0971-751X. Retrieved 3 September 2026.
  2. ↑ "GISAT-1, 2 (EOS-03, 05)". Gunter's Space Page. Retrieved 2 February 2026.
  3. ↑ "CEOS EO Handbook – AGENCY SUMMARY - ISRO". CEOS. October 2022. Retrieved 1 December 2022.
  4. ↑ "WMO OSCAR | Satellite: GISAT". space.oscar.wmo.int. Retrieved 26 November 2025.
  5. ↑ "GSLV-F17/EOS-05 MISSION". www.isro.gov.in. Retrieved 30 August 2026.
  6. ↑ "The GISAT-1A Mission". INSIGHTS IAS - Simplifying UPSC IAS Exam Preparation. 20 August 2026. Retrieved 3 September 2026.
  7. ↑ C.S, Hemanth (4 September 2026). "ISRO successfully launches Earth observation satellite EOS-05". The Hindu. ISSN 0971-751X. Retrieved 6 September 2026.
  8. ↑ "'Smart boy' GSLV delivers GISAT-1 into orbit, India gets new eyes in space". India Today. 4 September 2026. Retrieved 6 September 2026.
  9. ↑ "EOS-05 satellite completes orbit manoeuvres en route to GEO". BusinessLine. 6 September 2026. Retrieved 6 September 2026.
  10. ↑ Singh, Gurpreet (6 September 2026). "171 km to 20,000 km: ISRO EOS-05 completes first orbit raise on journey to 35,786 km orbit". Moneycontrol. Retrieved 6 September 2026.
  11. ↑ "New 'eye in the sky': Isro's EOS-05 satellite settles into geosynchronous orbit". The Indian Express. 8 September 2026. Retrieved 8 September 2026.
  12. ↑ "ISRO's EOS-05 Mission: Final Orbit-Raising Manoeuvre Successful, Satellite Now In Geostationary Orbit". ETV Bharat News. 8 September 2026. Retrieved 8 September 2026.