Overview
- The GSLV-F17 launched EOS-05 (GISAT-1A) from Sriharikota on September 4 and placed it into a sub-geosynchronous transfer orbit for the spacecraft to complete orbit raising.
- EOS-05 used a sequence of Liquid Apogee Motor burns to climb from the sub-GTO through intermediate orbits to a near-circular geosynchronous altitude, and ISRO reports the spacecraft is healthy.
- The first LAM burn raised the orbit to about 20,000 km by 31,129 km and later manoeuvres pushed the perigee close to geosynchronous height so the satellite can be placed at its assigned 85.5°E slot.
- The satellite weighs 2,367 kg — the heaviest payload launched by a GSLV — and has an expected operational life of about nine years, according to ISRO.
- Planned as a persistent overwatch layer, EOS-05 will deliver sector images every five minutes and full‑country coverage roughly every 30 minutes at tens-of-metres resolution and will cue higher-resolution low‑orbit assets as part of India’s wider Space Based Surveillance Phase III program.