ISRO General News and Updates

[pmaitra]

Again,you go wrong there.UK has the technology to launch satellites on it's own but since they are a part of ESA,they use ESA's rockets.

Why are they part of ESA when they have, as you claim, technology to launch satellites on their own?

 

[CrYsIs]

Why are they part of ESA when they have, as you claim, technology to launch satellites on their own?

Much cheaper to run a joint space program than an individual space program

 

[Neeraj Mathur]

ISRO.................................

 

[Neeraj Mathur]

GSLV Successfully Launches India’s Latest Communication Satellite GSAT-6

In its ninth flight (GSLV-D6) conducted today, (August 27, 2015), India's Geosynchronous Satellite Launch Vehicle, equipped with the indigenous Cryogenic Upper Stage (CUS), successfully launched GSAT-6, the country's latest communication satellite, into a Geosynchronous Transfer Orbit (GTO). The achieved orbit is very close to the intended one. The launch took place from the Second Launch Pad at the Satish Dhawan Space Centre SHAR (SDSC SHAR), Sriharikota, the spaceport of India. This was the fifth developmental flight of GSLV and the third to carry the indigenous CUS. GSLV-D6 was intended to further test and qualify the CUS developed by ISRO.

In its oval shaped GTO, the GSAT-6 satellite is now orbiting the Earth with a perigee (nearest point to Earth) of 168 km and an apogee (farthest point to Earth) of 35,939 km with an orbital inclination of 20.01 deg with respect to the equator.

After a smooth 29 hour countdown, the 416 tonne, 49 m tall GSLV-D6 carrying the 2117 kg GSAT-6, lifted off at 16:52 Hrs IST. About seventeen minutes after lift-off, GSAT-6 was successfully placed in GTO.

At 4.8 seconds before the countdown reached zero, the four liquid propellant strap-on stages of GSLV-D6, each carrying 42 tonne of liquid propellants, were ignited. At count zero and after confirming the normal performance of all the four strap-on motors, the mammoth 139 tonne solid propellant first stage core motor was ignited and GSLV lifted off. The major phases of the flight included the core motor burn-out, strap on burn-out, ignition of the second stage, separation of the core motor together with strap-ons, payload fairing separation, second stage separation, CUS ignition and its timely shut down after satisfactory performance. Following this, GSAT-6 separated from CUS about 17 minutes after launch.

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.

In the coming days, GSAT-6's 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. 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.

Today’s flight of GSLV underscores the success of ISRO in mastering the highly complex cryogenic rocket propulsion technology.

http://www.isro.gov.in/update/27-au...india’s-latest-communication-satellite-gsat-6

 

[Neeraj Mathur]

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

India on Thursday launched its latest communication satellite, GSAT-6, using a homegrown cryogenic engine. The first launch using the cryo engine was on January 5, 2014, after ISRO grappled with the high-end technology for two decades and triumphed after repeated failures.


India on Thursday launched its latest communication satellite, GSAT-6, using a homegrown cryogenic engine.

The first launch using the cryo engine was on January 5, 2014, after ISRO grappled with the high-end technology for two decades and triumphed after repeated failures.

What's so special?
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 ::
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 ::
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 ::
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 ::
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.

http://www.defencenews.in/defence-news-internal.aspx?id=WZ/D2liXfEI=

 

[pmaitra]

Much cheaper to run a joint space program than an individual space program

Couldn't be the reason. They have money to give away as unsolicited aid, and they claim their aid money makes all this happen. Why don't they stop aid and launch their own? That way, it would be just as cheap?

 

[Neeraj Mathur]

GSAT-6 Update: First orbit raising operation of GSAT-6 was successfully completed

GSAT-6 Update:

First orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 3385 seconds at 08:35hr IST on Aug 28, 2015. 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 hr 15 min 24 sec.

 

[Neeraj Mathur]

GSAT-6 UPDATE: Second orbit raising operation of GSAT-6 was successfully completed

Second orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 2663 seconds at 11:10:53 hr IST on Aug 29, 2015. Realised orbit is 26998 km (perigee height) by 35682 km ( apogee height) with an inclination of 0.115 degree and an orbital period of 20 hr 15 min.

 

[Neeraj Mathur]

GSAT-6 Update: Third orbit raising operation of GSAT-6 was successfully completed

Third orbit raising operation of GSAT-6 was successfully completed by firing the Apogee Motor for 580.32 seconds at 07:46 hr IST on Aug 30, 2015. Preparation for deployment of the unfurlable antenna (UFA) is in progress.

 

[Neeraj Mathur]

GSAT-6 update : Deployment of the unfurlable antenna (UFA) is in progress

 

[cobra commando]

ISRO to boost GSLV capability
__________

 

[cobra commando]

Isro, Nasa's Nisar Earth Observation Satellite to Be Launched in 2021

 

[Neeraj Mathur]

GSAT-6 UPDATE: Deployment of the unfurlable antenna (UFA) is successfully completed

 

[Neeraj Mathur]

why doesn't isro put onboard camera on our rockets and satellites.

 

[cannonfodder]

This satellite may have military applications(communication) as per some reports. If it has camera on board or sensors related to military applications it is not an good idea to advertise it. Do it makes sense?

http://www.business-standard.com/ar...military-satellite-gsat-6-115083000688_1.html

why doesn't isro put onboard camera on our rockets and satellites.

 

[charlie]

This satellite may have military applications(communication) as per some reports. If it has camera on board or sensors related to military applications it is not an good idea to advertise it. Do it makes sense?

http://www.business-standard.com/ar...military-satellite-gsat-6-115083000688_1.html

It's not because of military application with the camera nothing will be compromised, it's just the additional expense and design issue where to keep camera and more effort for nothing.

 

[cannonfodder]

How do the military then gather intelligence on nuclear assets, terrorist camps, border posts and formations on other side of border(apart from human intel)? Just asking if you know.. I don't remember hearing any country boosting about military applications on launched satellites. So thought it may have military angle to it.

It's not because of military application with the camera nothing will be compromised, it's just the additional expense and design issue where to keep camera and more effort for nothing.

 

[Illusive]

How do the military then gather intelligence on nuclear assets, terrorist camps, border posts and formations on other side of border(apart from human intel)? Just asking if you know.. I don't remember hearing any country boosting about military applications on launched satellites. So thought it may have military angle to it.

This just gives the military access to secured communication in remote locations. This satellite is dual use i.e both civilian and military. The ones you mentioned are done by remote sensing satellites and ground based intel.

 

[Neeraj Mathur]

GSAT-6 orbit after third orbit raising
After the third orbit raising operation of GSAT-6, realised orbit is: perigee height - 35634 km, apogee height - 35681 km, inclination 1.17 degree. Present longitude is 78 deg & satellite is drifting towards station of 83 degree.

 

[Neeraj Mathur]

This satellite may have military applications(communication) as per some reports. If it has camera on board or sensors related to military applications it is not an good idea to advertise it. Do it makes sense?

http://www.business-standard.com/ar...military-satellite-gsat-6-115083000688_1.html

not military, like nasa puts camera on their rockets and shows the views when rockets leave earth's atmosphire

@charlie

camera on satellite to see this