ISRO General News and Updates

tramp

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ISRO focus overwhelmingly has to be on GSLV-Mk2 first because that is the tech demonstrator fro GSLV-Mk3. Hope the August date will hold and the launch will be successful.
 

arnabmit

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August launch for ISRO's first defence satellite

In about a month, yet another but far more important Indian satellite for military communication network will be launched from the South American spaceport at Kourou.

GSAT-7 or INSAT-4F is slated for launch on August 30 and is exclusively meant for the armed forces, primarily Indian Navy. From its slot over 74 degrees East longitude, it is said to boost the naval arm's strategic communication strengths across warships in Indian waters and their commands — but that is about all we may know for now about the first Indian military-only communication spacecraft.

"With GSAT-7 you will see a sea change in communication over the region," an official recently told The Hindu , playing on the word.

The spacecraft was earlier meant to be launched on the indigenous GSLV but that programme is not fully ready: the first resumed GSLV using the Indian cryogenic stage is slated to fly on August 19 after nearly three years.

Blocking capacity

Traditionally, the INSAT communication satellites met the needs of the defence forces by blocking a small part of their transponder capacity for secure communications. In recent years, the armed forces have been demanding special satellites and a larger share of space for themselves as part of national defence.

ISRO on its own PSLVs has put in orbit three earth observation satellites. Its remote sensing satellites RISAT-1 of 2012, TecSAR of 2009 and TES of 2001 have carried extremely sharp view cameras to spot people and objects from heights of around 700 km.

The agency has never admitted the military functions, merely describing these satellites as multi-purpose.

The 2,550-kg GSAT-7 is undergoing preliminary checks at the Guiana Space Centre in Kourou. It carries multiple bands in ultra high frequency, S band, C band and the higher Ku band, says ISRO's website.

GSAT-7 will be flown on Arianespace's Ariane 5 launcher VA215, according to the European company that has rolled out its next campaign after Friday's launch. Arianespace said it has got the 10-tonne lifter ready to take in GSAT-7 and its co-passenger, the 6-tonne broadcast satellite Eutelsat 25B/Es'hail 1 for Qatar Satellite Company.

As for ISRO, the GSAT-7 launch will briefly bring the curtains down on two unprecedented and hectic months of having launched four diverse satellites. Come October, it will have to hoist its milestone Mars Orbiter Mission all the way across 400 million km over nine months.

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This one is going to sit almost directly on top of Addu City, Maldives.
 
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arnabmit

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ISRO forms committee to probe anomalous behaviour of INSAT-3D | idrw.org

Indian Space Research Organisation has constituted a committee chaired by a retired top official to probe the "anomalies" on the country's advanced weather satellite INSAT-3D immediately after its launch on July 26.
ISRO officials faced anxious moments as the spacecraft was "untraceable" for some-time before it could be tracked by the space agency's Master Control Facility (MCF) at Hassan in Karnataka.

"A committee headed by T K Alex, a former Director of ISRO Satellite Centre, has been formed to look into the issue", an ISRO source told PTI.

It's immediately not clear if the primary system had suffered damage, and if it had implications vis-a-vis intended life of the spacecraft. Sources said the remaining critical operations were carried out using redundant system.

Meanwhile, ISRO said in a statement today that INSAT-3D, launched by European consortium Arianespace's rocket from Kourou, French Guiana, has successfully been placed in geosynchronous orbit after three orbit raising manoeuvres commanded from MCF.

"Though there was an anomalous behaviour of the satellite after the deployment of its solar panel,the Mission Operations Team of ISRO could immediately bring the Satellite into normalcy using prescribed contingency procedures and then resume the orbit-raising operations", ISRO said.

INSAT-3D is now moving towards its final geostationary orbital location of 82 degree East longitude and on August six it will reach this destination, it said.

Subsequently, the two meteorological payloads (Imaging System and Atmospheric Sounder), as well as the two transponders (designed for the Meteorological Data Relay and Satellite-aided Search and Rescue system) would be activated by August eight, the ISRO statement said.
 

venkat

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Hindu says one of the satellite command and control receiver failed irrevocably!!! standby receiver is connected. mission resumed!!! not able to see insat-3d on n2yo. is all is well with insat-3d?
 

venkat

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NORAD ID: 39216
Int'l Code: 2013-038B
Perigee: 35,788.4 km
Apogee: 35,799.0 km
Inclination: 0.2 °
Period: 1,436.1 minutes
Semi major axis: 42164 km
Launch date: July 25, 2013
Source: India (IND)
Comments: INSAT 3D is an indian meteorological satellite launched aboard the Ariane 5 ECA weighting 2,120 kilograms at launch and is designed to operate for seven years from 82 degrees east in geostationary orbit. The satellite carries a six-channel imager and a 19-channel sounder instrument, with the latter designed to take vertical profiles of atmospheric humidity, temperature and ozone levels. Insat 3D also carries a search-and-rescue transponder to relay distress signals from maritime, aeronautical and terrestrial beacons to alert rescue centers.
 

arnabmit

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[video=youtube_share;kKHM1DCxtOo]http://youtu.be/kKHM1DCxtOo[/video]
 

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