(July 10, 2015), ISRO's Polar Satellite Launch
Vehicle PSLV-C28 successfully launched three identical DMC3 commercial
Earth Observation Satellites, along with two smaller satellites from United
Kingdom, into a polar Sun Synchronous Orbit which was very close to the
intended orbit of 647 km height. The five satellites together weighed about
1440 kg at lift-off.
These five
satellites were launched as part of the agreement entered into between DMC
International Imaging (DMCii), a wholly owned subsidiary of Surrey Satellite
Technology Limited (SSTL), UK and Antrix Corporation Limited, the commercial
arm of the Indian Space Research Organisation (ISRO), a government of India
Company under the Department of Space (DOS).
This was the twenty ninth consecutively successful flight of PSLV.
PSLV was
launched today in its heaviest ‘XL’ version with six strap-on motors of the
first stage. This flight was unique since for the first time, the ‘XL’ version
of PSLV was used to launch foreign payloads exclusively. Till now, the lighter ‘core alone’ version of
PSLV has been used to launch foreign payloads exclusively. PSLV has
successfully launched 45 satellites for customers from abroad including five UK
satellites launched today.
Through 29
successful flights during 1994-2015 period, PSLV has launched a total of 77
satellites with a total mass of 32.04 tons, of which 4.64 tons (about 14%)
comprises 45 satellites for customers from abroad. The vehicle has repeatedly
proved its reliability and versatility by successfully launching satellites
into a variety of orbits including polar Sun Synchronous, Geosynchronous
Transfer and Low Earth orbits thereby emerging as the workhorse launch vehicle
of India.
After a 62.5
hour smooth count down, the 320 ton PSLV-C28 lifted off from the First Launch
Pad (FLP) at SDSC SHAR at 2158 hrs (9:58 pm) IST with the ignition of its first
stage. The important flight events included the ignition and separation of
strap-ons, separation of the first stage, ignition of the second stage,
separation of the payload fairing at about 118 km altitude after the vehicle
had cleared the dense atmosphere, second stage separation, third stage ignition
and third stage separation, fourth stage ignition and fourth stage cut-off.
Once in
proper orbit, the three DMC3 satellites were successfully deployed about 18
minutes after lift-off in quick succession.
Following this, the 7 kg Nanosatellite De-OrbitSail and the 91 kg
Microsatellite CBNT-1 were also successfully deployed.
Today’s
successful commercial launch of PSLV further underscores the country’s
capability in launch vehicle technologies
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