Satellites

ISRO gears up for GSAT-19, GSLV Mk III launch today

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MUMBAI: Another rocket will be turbo-charged into space today with its 3,136 kg payload (the GSAT-19 satellite) from India’s space launch site in Sriharikota in Andhra Pradesh. The only difference, when the GSLV Mk III takes off at 17:28 pm, it will place the Indian Space Research Organisation amongst a select few agencies which can launch satellites of up to 4,000 kg into geostationary orbit.

The GSLV Mk III is a three-stage heavy lift launch vehicle developed by ISRO. The vehicle has two solid strap-ons, a core liquid booster and a cryogenic upper stage. At 640 tonnes, it is India’s heaviest but shortest rocket at 43 metres

GSLV Mk III is designed to carry four ton class of satellites into geosynchronous transfer orbit (GTO) or about 10 tons to low earth orbit (LEO), which is about twice the capability of GSLV Mk II.

The two strap-on motors of GSLV Mk III are located on either side of its core liquid booster. Designated as ‘S200’, each carries 205 tons of composite solid propellant and their ignition results in vehicle lift-off. S200s function for 140 seconds. During strap-ons functioning phase, the two clustered Vikas liquid engines of L110 liquid core booster will ignite 114 sec after lift -off to further augment the thrust of the vehicle. These two engines continue to function after the separation of the strap-ons at about 140 seconds after lift -off.

Its payload, the GSAT 19, is configured around the ISRO’s standard I-3K bus. GSAT-19 carries Ka/Ku-band high throughput communication transponders. Besides, it carries a geostationary radiation spectrometer (GRASP) payload to monitor and study the nature of charged particles and the influence of space radiation on satellites and their electronic components. GSAT-19 also features certain advanced spacecraft technologies including miniaturised heat pipe, fibre optic gyro, micro electro-mechanical systems (MEMS) accelerometer, Ku-band TTC transponder, as well an indigenous Lithium-ion Battery.

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