ISRO's EOS-05 Satellite Begins Geosynchronous Orbit Ascent
India's EOS-05 Earth observation satellite, launched on 4 September, has performed two orbit-raising manoeuvres en route to its final geosynchronous orbit
The Indian Space Research Organisation's EOS-05 satellite is climbing towards its operational orbit. Launched on 4 September, the spacecraft has successfully executed two initial orbit-raising manoeuvres, according to a report from SpaceWatch.Global. Further engine burns are planned to position it in a geostationary orbit above Earth.
This mission represents India's first dedicated Earth observation satellite designed for a geosynchronous orbit. Most imaging satellites operate in much lower orbits, providing frequent revisits over different areas. A geostationary position offers a constant view of a vast portion of the Earth's surface, enabling continuous monitoring of weather patterns, disasters, and other dynamic phenomena from a fixed vantage point.
The Orbital Ascent Phase
The journey to geostationary orbit is a multi-step process. Following its launch, EOS-05 was initially placed into a lower transfer orbit. The two completed manoeuvres have begun the critical task of circularizing and raising its altitude. Each planned engine burn carefully adjusts the satellite's trajectory, conserving fuel while gradually extending its orbital path. The final series of burns will synchronize the satellite's speed with Earth's rotation, locking it into its designated slot high above the equator. ISRO's EOS-05 has completed two orbit-raising manoeuvres following its 4 September launch, with further burns planned to reach its operational geosynchronous orbit.
Mission Significance and Capabilities
Placing an imaging payload in geostationary orbit is a significant technical achievement for ISRO. The primary advantage is persistent surveillance. Unlike low-Earth orbit satellites that pass over a region only a few times a day, EOS-05 will maintain a permanent field of view over India and surrounding regions. This capability is expected to greatly enhance real-time monitoring of cyclones, floods, and other meteorological events. The satellite's sensors are reportedly tailored for high-temporal-resolution imaging, meaning it can capture rapid changes in cloud cover, sea surface temperatures, and land conditions.
The Launch and Vehicle
The source report confirms the satellite's launch date but does not specify the launch vehicle used. ISRO typically employs its Geosynchronous Satellite Launch Vehicle (GSLV) or the more powerful Launch Vehicle Mark-III (LVM3) for missions targeting geostationary orbits. The successful deployment on 4 September initiated the current orbital ascent campaign. The focus now is on the precise orbital mechanics required to deliver EOS-05 to its final operational destination.
The mission shows ISRO's expanding capabilities in high-value orbital regimes. With the completion of its orbit-raising manoeuvres, EOS-05 is on track to become a cornerstone for India's environmental and meteorological observation from space.
