India's first exclusive satellite for Navy, GSAT-7, was successfully launched by European space consortium Arianespace's Ariane 5 rocket from Kourou spaceport in French Guiana, at 0200 hrs IST (Indian Standard Time) on Friday.
GSAT-7 is India's first dedicated spacecraft for Defense applications. 'It has frequency bands that will help marine communications', the PTI reported. Quoting an official of Bangalore-headquartered Indian Space Research Organisation (ISRO).
'The satellite has coverage over India mainland and its surrounding seas. It's important from security and surveillance points of the view', the official said on condition of anonymity.
A wel known senior space scientist said, 'So far, Navy had limitation from line of sight and ionospheric effects etc. It was thought essential to have an integrated platform for their exclusive use. Earlier, satellite communication in ships was through Inmarsat (a major provider of global mobile satellite communications services). Now, India will have its own set up'
ISRO shies away from calling it an exclusive satellite for the Navy on record, but privately admits exactly that.
The Rs 1,850,000 state-of-the-art satellite carries payloads operating in UHF, S, C and Ku bands.
GSAT-7 has a lift-off mass of 2,625 kg and is based on ISRO’s 2,500 kg satellite bus with some new technological elements, including the antena, Its solar arrays generate 2,900 W of electrical power.
A108 Ampere-Hour Lithium-Ion battery enables the satellite to function during the eclipse period. The propulsion subsystem has a 440 Newton Liquid Apogee Motor (LAM) and thrusters.
The launch cost for ISRO is around Rs 470 crore, including insurance. ISRO can't launch heavy satellites like GSAT-7 as its home-grown GSLV rocket, with indigenous cryogenic stage, is still at works and needs two successful flights before it's declared operational.
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