India
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ISRO places EOS-05 into geosynchronous orbit path
The Indian Express··7 Sept
ISRO's EOS-05 satellite is moving into a geosynchronous orbit after weekend orbit-raising burns, scientists indicated. Launched Friday on GSLV F17 into a 171 km by 31,000 km transfer orbit, it reached about 20,000 km by 35,786 km after Sunday's firing. Officials said it will operate in GSO rather than circular GEO, as India's first dedicated imaging satellite in that class.
Prism
What It Means For You
- Once operational, EOS-05 is meant to supply strategic imaging data, with the Indian Navy among expected users.
- ISRO said further manoeuvres will place the satellite in the 85.5° East orbital slot.
- A circular GEO at 35,786 km is normally preferred for continuous stare imaging.
What's Happening
- Saturday's LAM burn lasted 5406.4 seconds and Sunday's second burn lasted 338.9 seconds.
- Chairman V Narayanan said the rocket delivered more energy than the planned 170 km by 29,000 km path.
- Spacecraft director Imteyaz Ahmed called the injection precise for this class of Earth observation satellite on GSLV.
Why Orbit Choice Matters
- Geostationary orbit is a circular, equatorial subset of geosynchronous orbits.
- EOS-03 failed in August 2021 when GSLV F10's cryogenic stage underperformed.
- NVS-02 last year failed after onboard engines did not fire for orbit raising.
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