India's EOS-05 Earth-observation mission has completed its planned orbit-raising sequence after launching aboard the GSLV-F17 from Sriharikota on September 4, 2026. ISRO's latest update says the third and final orbit-raising manoeuvre was completed successfully on September 7.
During the final manoeuvre, EOS-05's liquid apogee motor fired for 1,247 seconds. ISRO reported an estimated post-manoeuvre orbit of approximately 34,903 km by 35,884 km and said the satellite's health was normal.
From launch to operational orbit
EOS-05 was launched as the payload of the GSLV-F17 mission. After reaching its initial transfer trajectory, the spacecraft used its onboard propulsion to progressively raise and reshape its orbit.
These orbit manoeuvres are a normal but critical part of placing a satellite into its intended operational orbit. Instead of having the launch vehicle directly complete every orbital adjustment, the spacecraft can use its own propulsion system to perform controlled changes after separation.
Why the final manoeuvre matters
The final orbit-raising burn brought EOS-05 much closer to its intended geosynchronous operating regime. ISRO's earlier updates recorded successful first and second manoeuvres as the spacecraft's orbit was gradually increased.
Reaching the target orbit is especially important for an Earth-observation satellite because mission teams need predictable orbital geometry before routine operations can begin. The next phase is commissioning and preparation for planned observation work.
What EOS-05 adds
EOS-05 is part of India's Earth-observation satellite fleet. Such missions provide space-based data that can support mapping, environmental monitoring, agriculture, disaster response and other applications. The value of an observation satellite depends on a healthy spacecraft, stable orbit and reliable delivery of usable data.
India's 2026 launch activity
ISRO's official launch list records GSLV-F17/EOS-05 as a 2026 launch mission from Satish Dhawan Space Centre. The September mission adds another operational milestone for India's GSLV program.
What happens next
With the orbit-raising sequence complete and satellite health reported as normal, the focus moves to commissioning and operational preparation. The coming phase will determine when EOS-05 begins routine Earth-observation activities and how its data is incorporated into India's broader remote-sensing program.
Source
ISRO — Third and final EOS-05 orbit manoeuvre
