GSLV-D6 / GSAT-6 Mission - INSAT-4E Strategic S-Band Advanced Military Communication Satellite

[Super Falcon]

Launch of Isro’s Geostationary Satellite Launch Vehicle (GSLV-D6) - The Times of India

@Zarvan @Windjammer @Super Falcon @Indus Falcon @Tipu7 @RiazHaq

Good for india congrats even it is against us

 

[Nilgiri]

having ROCKETS n SATELLITES without DSI???

Actually on the GSLV mk 3 boosters, you can see a shroud at the very bottom at the fuel tank/nozzle interface area.

The purpose of this I suspect to be mostly a thermal shroud but I think there is also an aerodynamic advantage given the pressure drop (and higher effective thrust) from the bernoulli effect of diverting the airflow by having this shroud (the effect is probably only a few percent if that ).

It hasn't come out in the open because then certain people will say we attempted to copy DSI technology onlee....because anything remotely to do with aerodynamics = DSI is superior to it ok?

 

[Great Sachin]

great job ISRO

 

[trident2010]

5 years is a realistic time frame.

In 10 years time we should have a man rated rocket and space capsule.

 

[Chanakyaa]

In 10 years time we should have a man rated rocket and space capsule.

I beg to differ. Its a waste of resources. We must focus on PURE COMMERICAL applications, thats what we need in India. We need Jobs and Money to feed Billions.

One or two launches for demonstration is Fine, but we must not waste money over Manned Missions. better Join ISS Consortium to carry research.

India can and should focus on having something like the RD-180. The ULV seems ambitious.
For me :

- NASA asking ISRO to launch a 10 Tonne capsule for ISS
- an RD 180 equipped TSTO SLV
- IT like , Trust and Lions Share in Satellite Market

is far more bigger achievement than placing a Man with oxygen tank in LEO.

 

[ZooZoo]

Sare Pakistani kahan gaye, @@thesolar65, congo to us Indians.Sare Pakistani kahan gaye, @@thesolar65, congo to us Indians.

I found one under the table .

Common Mods, Don't be touchy , you can't bann for such funny post...

 

[Hindustani78]

President's Secretariat
28-August, 2015 10:36 IST
President of India congratulates ISRO for the successful launch of GSLV-D6 carrying GSAT-6

The President of India, Shri Pranab Mukherjee has congratulated the Indian Space Research Organization (ISRO) on GSLV-D6 successfully launching GSAT-6, an advanced communication satellite into the Transfer Orbit.

In a message to Shri A.S. Kiran Kumar, Chairman of ISRO, the President has said, “Please accept my hearty congratulations to you and your entire team at the Indian Space Research Organisation (ISRO) for the successful launch of GSLV-D6 carrying GSAT-6, an advanced communication satellite.

Kindly convey my greetings to the members of your team of scientists, engineers, technologists and all others associated with this great mission. Our nation is grateful for their hard work and proud of their accomplishments.”

***

 

[manishmaithani]

I beg to differ. Its a waste of resources. We must focus on PURE COMMERICAL applications, thats what we need in India. We need Jobs and Money to feed Billions.

One or two launches for demonstration is Fine, but we must not waste money over Manned Missions. better Join ISS Consortium to carry research.hank god ur nt

India can and should focus on having something like the RD-180. The ULV seems ambitious.
For me :

- NASA asking ISRO to launch a 10 Tonne capsule for ISS
- an RD 180 equipped TSTO SLV
- IT like , Trust and Lions Share in Satellite Market

is far more bigger achievement than placing a Man with oxygen tank in LEO.

Thank god ur not like @jamadar. ur more realistic

 

[Hindustani78]

 

[Hindustani78]

What's special about the high-end cryogenic engine used in ISRO's GSAT-6?


What's so special?
28 Aug, 2015
A cryogenic engine uses liquid oxygen at -253 degrees Celsius and liquid hydrogen at -183 degrees Celsius. This provides the thrust needed in the final stage of the rocket to put satellites, weighing two tonnes or more, into a geosynchronous orbit.


Power Provider
28 Aug, 2015
The cryogenic engine, used by ISRO in its Geosynchronous Satellite Launch Vehicle (GSLV), is essential for launching heavier satellites.

India was earlier using the Polar Satellite Launch Vehicle (PSLV) system that dosen't use cryogenic technology and can only put small satellites, weighing just over one tonne, into geosynchronous orbit.

The elite club
28 Aug, 2015
Mastering the cutting-edge technology puts India in the elite club of just six members. Only US, Russia, the European Space Agency, China and Japan have developed a cryogenic engine.


Project GSLV
28 Aug, 2015
India started the GSLV project in 1990 to become independent in launching geosynchronous satellites.

Earlier, the country depended on the US and Europe for launching its INSAT class satellites.

Even sky is not the limit
28 Aug, 2015
By repeating the success of January 5, 2015, with the launch of GSAT-6.

ISRO has a high-end technology at hand that makes interplanetary probes and even manned missions to space a possibility.

 

[Nilgiri]

That too the cryo is a staged combustion cryo....which means more difficult design (more advanced plumbing) but more efficient use of bi-propellant (fuel/oxidiser combusted partially to drive the pumps is allowed to flow to main combustion chamber rather than vented off like a gas generator).

The larger upcoming cryos are all gas generator (simpler).

I really hope ISRO is also planning to scale up design of this staged combustion design in CE-7.5 to gain maximum benefit from its higher efficiency....but then maybe they have already done the CBA of this and have opted for gas generator anyways (CE-20 and CE-60) to push ahead with the deadlines.

Semi-cryo project is also of great interest....wish ISRO success with this, it will determine how far mk III will go in comparing with the ariane family without overhauling its entire design.

To compare with the heaviest of ariane heavies, one or two more iterations of GSLV will be required (mk4 and 5) I feel to scale up mk 3 and incorporate all the lessons learned effectively and efficiently at larger scales.

 

[proud_indian]

https://twitter.com/x/status/637432186665234432

 

[gslv mk3]

The larger upcoming cryos are all gas generator (simpler).

I really hope ISRO is also planning to scale up design of this staged combustion design in CE-7.5 to gain maximum benefit from its higher efficiency....but then maybe they have already done the CBA of this and have opted for gas generator anyways (CE-20 and CE-60) to push ahead with the deadlines.

CE 60 will use staged combustion cycle

 

[Nilgiri]

CE 60 will use staged combustion cycle

Oh really? I didn't know. You got a source for that?

 

[Napalm]

ORBIT Raising Seccessfull!!!

BENGALURU: After successful launch of GSAT-6, the country's latest communication satellite into a Geosynchronous Transfer Orbit, Indian Space Research Organisation today said it has performed the first orbit raising of the satellite.

"First orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 3385 seconds at 08:35 hrs IST on August 28," ISRO said.

Realised orbit is 8,408 km (perigee height) by 35,708 km (apogee height) with an inclination
of 7.5 degree and an orbital period of 13 hours, 15 minutes and 24 sec, it said.

ISRO on Thursday had successfully launched GSAT-6, having an indigenous cryogenic engine, on-board the GSLV-D6 rocket from the spaceport at Sriharikota.

Soon after its injection into GTO, the two solar arrays of GSAT-6 were automatically deployed and the Master Control Facility (MCF) at Hassan in Karnataka took control of GSAT-6, ISRO had said after the launch.

In the coming days, GSAT orbit will be raised from its present GTO to the final circular Geostationary Orbit (GSO) by firing the satellite's Liquid Apogee Motor (LAM) in stages, it had said.

The satellite will be commissioned into service after the completion of orbit raising operations, deployment of its 6 m wide sieve shaped unfurlable antenna, the satellite's positioning in its designated orbital slot of 83 degree East longitude in the GSO and in-orbit testing of its communication payloads.

GSAT-6
is the 25th geostationary communication satellite of India built by ISRO and 12th in the GSAT series. It provides communication through five spot beams in S-band and a national beam in C-band for strategic users.

The cuboid shaped GSAT-6 had a lift-off mass of 2117 kg. Of this, propellants weighed 1132 kg and the dry mass of the satellite was 985 kg at the time of launch.

Read more at:
First orbit raising operation of GSAT-6 completes successfully - The Economic Times