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India launches advanced weather satellite in textbook style
India successfully launched its INSAT-3DR advanced weather satellite in copy-book style on Thursday evening using its heavy geosynchronous satellite launch vehicle (GSLV-F05) rocket.
Around 17 minutes after lift-off from the Satish Dhawan Space Centre here at 4.50 p.m., the GSLV rocket slung the 2,211 kg satellite into a geosynchronous transfer orbit (GTO), from where it would be guided to its final geostationary orbit. The launch was delayed by 40 minutes as the fuelling of the third stage of the rocket took longer than expected.
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With the launch of INSAT-3DR, the Indian space agency has successfully launched three satellites weighing over two tonnes of the six satellites weighing over two tonnes it had flown in a GSLV rocket.
The successful flight of the GSLV rocket on Thursday gives the Indian space programme a much-needed boost as getting the third stage cryogenic engine right is important for its future space programmes as well as for commercial launches.
Indian space scientists have spent around two decades and around Rs 500 crore ($75 million)in conceiving and developing the cryogenic technology.
Indian Space Research Organisation (ISRO) scientists at the mission control centre were visibly happy. They slapped each other on the back and hugged each other once the rocket ejected the satellite, which can also aid in search and rescue (SAR) missions, into its intended orbit.
"Today we reached one more landmark, successfully putting the weather monitoring satellite into orbit," ISRO's Chairman A.S. Kiran Kumar said.
According to ISRO, the satellite incorporates technological improvements like: (a) imaging in middle infrared band to provide nighttime pictures of low clouds and fog, (b) imaging in two thermal infrared bands for better estimating sea surface temperature and (c) higher spatial resolution in the visible and thermal infrared bands.
GSLV-F05 Successfully launches INSAT-3DR
— ISRO (@isro) September 8, 2016
Also on board the INSAT-3DR is a satellite-aided search and rescue transponder that operates at 406.05 MHz to pick up and relay signals from distress beacons of maritime, aviation and land based users to the Indian Mission Control Centre located at Bengaluru.
According to ISRO, the major users of this technology in India are the defence services, the Coast Guard, the Airports Authority of India, the Directorate General of Shipping and fishermen.
The Indian alert service region includes a large part of the Indian Ocean region covering India, Bangladesh, Bhutan, the Maldives, Nepal, Seychelles, Sri Lanka and Tanzania.
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The INSAT-3DR also carries a data relay transponder (DRT) for receiving meteorological, hydrological and oceanographic data from remote uninhabited locations in the coverage area from platforms like automatic weather stations, automatic rain gauges and agro met stations.
The satellite's life expectancy is 10 years.
The GSLV is a three stage rocket. The first stage is fired by solid fuel and its four strap-on motors by liquid fuel. The second powered by liquid fuel and the third is the ISRO-developed cryogenic engine that is more efficient as it provides more thrust for every kilogram of propellant burnt.
ISRO is perfecting the crucial cryogenic engine technology to save precious foreign exchange by launching heavier satellites on its own.
ISRO currently relies on the European Space Agency's Ariane rocket to launch its heavy communication satellites.
India pays around Rs 500 crore ($75 million) as the launch fee for sending up a 3.5 tonne communication satellite. The satellite cost is separate.
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ISRO can now launch satellites weighing around 2-2.5 tonnes till such time it readies an advanced GSLV variant -- GSLV-Mark III -- that can lug satellites weighing around four tonnes.
The year-end is expected to see the launch from here of the GSLV-Mk-III with the GSAT-19 communication satellite weighing around 3.2 tonnes -- the heaviest to be lifted by an Indian rocket.
Source IANS
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