ISRO set to launch its 100th satellite today

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The total weight of all the 31 satellites carried onboard PSLV-C40 is about 1323 kg.

This will be ISRO's first launch in 2018 and also the first after the unsuccessful mission of IRNSS-1H in August a year ago.

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The launch of the 100th satellite by ISRO signifies both its glorious achievements, and also the bright future of India's space programme.

ISRO adopted an optimum separation sequence of all its satellites so as to avoid any collisions. The failure stranded the IRNSS 1H satellite on the PSLV's upper stage, leaving it unable to separate from the rocket to begin its mission.

ISRO said that it will be launching 30 new satellites in the coming days.

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"Basically...the 100 satellites covers all student satellites also that have been put (by ISRO)", he told reporters at the post-launch briefing.

"It is a befitting tribute to our beloved chairman, who has been a driving force for ISRO, and an excellent welcome launch for our new chairman designate", P Kunhikrishnan, director of Satish Dhawan Space Centre, said.

The 710-kg earth observation satellite the PSLV will carry is the third in the Cartosat 2 series This is the 42nd flight of the PSLV. launch. At first, the take off had been scheduled at 9:28 am, but it was delayed a minute because there was a fear of the satellite colliding with debris. The satellites have been placed into a 505 km polar sun-synchronous orbit.

The mission control had fired the engines to restart the fourth stage for lowering the rocket to deploy the micro satellite in its intended orbit. This took slightly more time for PSLV-C40 launch.

The co-passengers on Friday's launch include Telesat's second prototype broadband communications satellite, following on the loss of the Canadian company's first experimental high-speed Internet craft on a failed Soyuz/Fregat rocket launch in late November.

India will use its latest satellites for better border surveillance and obtaining high resolution images of the earth.

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