Indian space scientists and engineers are making all-out efforts to establish a link with the communication satellite GSAT-6A launched on March 29, said an official on Tuesday.

On Sunday, the Indian Space Research Organisation (ISRO) admitted belatedly that it lost the crucial link with GSAT-6A, two days after it was launched on 29 March on board the Geosynchronous Satellite Launch Vehicle (GSLV) from its spaceport in Sriharikota in Andhra Pradesh.

The satellite was to be placed in its intended orbit 36,000 km above ground level after three orbit-raising manoeuvres from the space agency's Master Control Facility (MCF) at Hassan in Karnataka, about 180 km from Bengaluru.

GSAT-6A, with a mission life of about 10 years, is designed to provide a thrust to mobile communication through its multi-beam coverage facility. It will also help in mobile communication even from remote locations through hand-held ground terminals and is considered a shot in the arm for the military.

The satellite is also aimed at providing a platform for developing technologies such as demonstration of 6-metre S-Band Unfurlable Antenna, hand-held ground terminals and network management techniques that could be useful in satellite-based mobile communication applications. "GSAT-6A is a complement to GSAT-6, which is already in orbit. These two satellites, combined, will provide a platform for the development of advanced technologies," Sivan had said post the launch.

This was the first mission under the chairmanship of Sivan, who assumed charge of the space agency in January. In August 2017, India's mission to launch its backup navigation satellite IRNSS-1H on board PSLV-C39 ended in a failure after a technical fault on the final leg following a perfect launch.

ISRO had then said the heat shield had not separated on the final leg of the launch sequence and, as a result, IRNSS-1H had got stuck in the fourth stage of the rocket.

(With inputs from Agencies)

GSAT-6A, with a mission life of about 10 years, is designed to provide a thrust to mobile communication through its multi-beam coverage facility

Indian space scientists and engineers are making all-out efforts to establish a link with the communication satellite GSAT-6A launched on March 29, said an official on Tuesday. On Sunday, the Indian Space Research Organisation (ISRO) admitted belatedly that it lost the crucial link with GSAT-6A, two days after it was launched on 29 March on board the Geosynchronous Satellite Launch Vehicle (GSLV) from its spaceport in Sriharikota in Andhra Pradesh. The satellite was to be placed in its intended orbit 36,000 km above ground level after three orbit-raising manoeuvres from the space agency's Master Control Facility (MCF) at Hassan in Karnataka, about 180 km from Bengaluru. GSAT-6A, with a mission life of about 10 years, is designed to provide a thrust to mobile communication through its multi-beam coverage facility. It will also help in mobile communication even from remote locations through hand-held ground terminals and is considered a shot in the arm for the military. The satellite is also aimed at providing a platform for developing technologies such as demonstration of 6-metre S-Band Unfurlable Antenna, hand-held ground terminals and network management techniques that could be useful in satellite-based mobile communication applications. "GSAT-6A is a complement to GSAT-6, which is already in orbit. These two satellites, combined, will provide a platform for the development of advanced technologies," Sivan had said post the launch. This was the first mission under the chairmanship of Sivan, who assumed charge of the space agency in January. In August 2017, India's mission to launch its backup navigation satellite IRNSS-1H on board PSLV-C39 ended in a failure after a technical fault on the final leg following a perfect launch. ISRO had then said the heat shield had not separated on the final leg of the launch sequence and, as a result, IRNSS-1H had got stuck in the fourth stage of the rocket. (With inputs from Agencies)

GSAT-6A: 3 days on, ISRO yet to re-establish link with the communication satellite

After ISRO informed that it had lost contact with its GSAT-6A satellite on Sunday, they are now speculating that it is very well possible that it could become a 'fully loaded space debris' if link is not established soon enough.&nbsp

Although, ISRO says that it was making efforts to establish a link, with preliminary data showing there are chances of recovery.

As per reports, the satellite's onboard motors have fuel for raising its orbit and also for the next 10 years. The satellites are powered by solar panels that charge the onboard batteries.&nbsp

According to experts, the power system could have failed due to some short-circuiting or arcing resulting in what is known in the space terminology 'loss of lock' or loss of contact with the ground station.&nbsp

The ISRO Chief also pointed out that whenever there is disturbance, the satellite goes into "safe mode" and gets back immediately however, it has not happened this time. "Usually when these type of disturbances come, satellite will go into safe mode, then we establish the link and put the satellite back, but now we are not able to link, and that process is going on," he said.

"Once we are able to contact, then we will be able to do the further function," he added. &nbsp&nbsp

To a question on chances of recovery, Shivan said "right now the preliminary data shows we have chance, we keep trying. First, we have to get the link, that is the most important. Once it is there, we will be able to do the job."

The Indian Space Research Organisation lost communication with the satellite when it attempted to ignite the engine in a third and final move to its desired location after its March 29 textbook launch from the spaceport of Sriharikota in Andhra Pradesh.&nbsp

The second orbit raising operation of GSAT-6A was successfully carried out on Saturday, but when it was on course to normal operating configuration for the third and final firing scheduled for April 1, communication with the satellite was lost, the space agency said after maintaining unusual silence on the health of the satellite.

Although, ISRO says that it was making efforts to establish a link, with preliminary data showing there are chances of recovery

After ISRO informed that it had lost contact with its GSAT-6A satellite on Sunday, they are now speculating that it is very well possible that it could become a 'fully loaded space debris' if link is not established soon enough. Although, ISRO says that it was making efforts to establish a link, with preliminary data showing there are chances of recovery. As per reports, the satellite's onboard motors have fuel for raising its orbit and also for the next 10 years. The satellites are powered by solar panels that charge the onboard batteries. According to experts, the power system could have failed due to some short-circuiting or arcing resulting in what is known in the space terminology 'loss of lock' or loss of contact with the ground station. The ISRO Chief also pointed out that whenever there is disturbance, the satellite goes into "safe mode" and gets back immediately however, it has not happened this time. "Usually when these type of disturbances come, satellite will go into safe mode, then we establish the link and put the satellite back, but now we are not able to link, and that process is going on," he said. "Once we are able to contact, then we will be able to do the further function," he added. To a question on chances of recovery, Shivan said "right now the preliminary data shows we have chance, we keep trying. First, we have to get the link, that is the most important. Once it is there, we will be able to do the job." The Indian Space Research Organisation lost communication with the satellite when it attempted to ignite the engine in a third and final move to its desired location after its March 29 textbook launch from the spaceport of Sriharikota in Andhra Pradesh. The second orbit raising operation of GSAT-6A was successfully carried out on Saturday, but when it was on course to normal operating configuration for the third and final firing scheduled for April 1, communication with the satellite was lost, the space agency said after maintaining unusual silence on the health of the satellite.

GSAT-6A could become 'space debris' if link not established: Experts

Two days after India's latest communication satellite with military applications GSAT-6A was launched, the Indian Space Research Organisation (ISRO) today said it had lost contact with it and was making efforts to establish link.

The space agency lost communication with the satellite when it attempted to ignite the engine in a third and final move to its desired location after its March 29 textbook launch from the space port of Sriharikota in Andhra Pradesh.

The second orbit raising operation of GSAT-6A was successfully carried out on Saturday, but when it was on course to normal operating configuration for the third and final firing scheduled for April 1, communication with the satellite was lost, the space agency said after maintaining unusual silence on the health of the satellite.

A satellite is placed in orbit in three phases.

"Efforts are underway to establish link with the satellite," Bengaluru-headquartered ISRO said on its website.

The 2,140-kg GSAT-6A rode piggyback on ISRO's powerful geosynchronous rocket (GSLV-F08) fitted with indigenous cryogenic engine at the third stage and was put into orbit successfully after the launch in what was described by a senior ISRO official as a "magnificent mission".

GSAT-6A is aimed at helping in mobile communication even from very remote locations through hand-held ground terminals and is considered a shot in the arm for the armed forces.

The space agency's unusual silence regarding the satellite had set off speculation about its health.

ISRO, which normally communicates on its website about the orbit raising operations like it did on March 30, following the success of the first orbit raising operation, had not released any update since then.

The last update was on March 30, wherein it said, "The first orbit raising operation of GSAT-6A Satellite has been successfully carried out by Liquid Apogee Motor (LAM) Engine firing for 2188 sec from 09:22hr IST on March 30, 2018."

"Orbit Determination results from this LAM firing are: apogee X perigee height was changed to 36412 km X 5054 km. Inclination is 11.93 deg. Orbital period is 12hr 45min," it had said. 
ISRO did not spell out what went wrong.

Reports, however, suggest that the glitch was related to the satellite's power system after the second orbit-raising exercise yesterday, following which ISRO's top brass have reportedly gone into a huddle towards setting things right.

The orbit raising operation is carried out to hurl the satellite to its space home.

GSAT-6A, with a mission life of about 10 years, is designed to provide thrust to mobile communication through multi-beam coverage facility.

The satellite is also aimed at providing a platform for developing technologies such as demonstration of 6 m S-Band Unfurlable Antenna, hand-held ground terminals and network management techniques that could be useful in satellite-based mobile communication applications.

"GSAT-6A is a complement to GSAT6, already in orbit. These two satellites combined will provide a platform for development of advanced technologies," ISRO Chairman K Sivan had said post the launch.

This was the first mission for Sivan, who assumed charge of the space agency in January.

In August last year, India's mission to launch its backup navigation satellite IRNSS-1H on board PSLV-C39 ended in a failure after a technical fault on the final leg following a perfect launch.

ISRO had then said the heat shield had not separated on the final leg of the launch sequence and, as a result, IRNSS-1H had got stuck in the fourth stage of the rocket.&nbsp

The space agency lost communication with the satellite when it attempted to ignite the engine in a third and final move to its desired location after its March 29 textbook launch from the space port of Sriharikota in Andhra Pradesh

Two days after India's latest communication satellite with military applications GSAT-6A was launched, the Indian Space Research Organisation (ISRO) today said it had lost contact with it and was making efforts to establish link. The space agency lost communication with the satellite when it attempted to ignite the engine in a third and final move to its desired location after its March 29 textbook launch from the space port of Sriharikota in Andhra Pradesh. The second orbit raising operation of GSAT-6A was successfully carried out on Saturday, but when it was on course to normal operating configuration for the third and final firing scheduled for April 1, communication with the satellite was lost, the space agency said after maintaining unusual silence on the health of the satellite. A satellite is placed in orbit in three phases. "Efforts are underway to establish link with the satellite," Bengaluru-headquartered ISRO said on its website. The 2,140-kg GSAT-6A rode piggyback on ISRO's powerful geosynchronous rocket (GSLV-F08) fitted with indigenous cryogenic engine at the third stage and was put into orbit successfully after the launch in what was described by a senior ISRO official as a "magnificent mission". GSAT-6A is aimed at helping in mobile communication even from very remote locations through hand-held ground terminals and is considered a shot in the arm for the armed forces. The space agency's unusual silence regarding the satellite had set off speculation about its health. ISRO, which normally communicates on its website about the orbit raising operations like it did on March 30, following the success of the first orbit raising operation, had not released any update since then. The last update was on March 30, wherein it said, "The first orbit raising operation of GSAT-6A Satellite has been successfully carried out by Liquid Apogee Motor (LAM) Engine firing for 2188 sec from 09:22hr IST on March 30, 2018." "Orbit Determination results from this LAM firing are: apogee X perigee height was changed to 36412 km X 5054 km. Inclination is 11.93 deg. Orbital period is 12hr 45min," it had said. ISRO did not spell out what went wrong. Reports, however, suggest that the glitch was related to the satellite's power system after the second orbit-raising exercise yesterday, following which ISRO's top brass have reportedly gone into a huddle towards setting things right. The orbit raising operation is carried out to hurl the satellite to its space home. GSAT-6A, with a mission life of about 10 years, is designed to provide thrust to mobile communication through multi-beam coverage facility. The satellite is also aimed at providing a platform for developing technologies such as demonstration of 6 m S-Band Unfurlable Antenna, hand-held ground terminals and network management techniques that could be useful in satellite-based mobile communication applications. "GSAT-6A is a complement to GSAT6, already in orbit. These two satellites combined will provide a platform for development of advanced technologies," ISRO Chairman K Sivan had said post the launch. This was the first mission for Sivan, who assumed charge of the space agency in January. In August last year, India's mission to launch its backup navigation satellite IRNSS-1H on board PSLV-C39 ended in a failure after a technical fault on the final leg following a perfect launch. ISRO had then said the heat shield had not separated on the final leg of the launch sequence and, as a result, IRNSS-1H had got stuck in the fourth stage of the rocket.

ISRO loses contact with GSAT-6A, trying to establish link

ISRO has said that it has lost communictions links with its GSAT-6A satellite.&nbsp;

The GSAT-6A had been launched on board the Geosynchronous Satellite Launch Vehicle (GSLV) on Thursday.&nbsp;

The launch vehicle had deposited the satellite in transfer orbit on March 29. It was to be placed in final orbit today. .

"After the successful long-duration firings, the communication from the satellite was lost when it (satellite) was on course for the final firing (to place the satellite in its final geostationary orbit), scheduled for April 1 (Sunday)," ISRO said in a statement.&nbsp;

It added that efforts are on to re-establish links with the satellite.&nbsp;

Only after re-establishing communications&nbsp;links with the satellite can it be put in final orbit.&nbsp;

The GSAT-6A, launched on Thursday, was to be put into final geostationary orbit today

ISRO has said that it has lost communictions links with its GSAT-6A satellite. The GSAT-6A had been launched on board the Geosynchronous Satellite Launch Vehicle (GSLV) on Thursday. The launch vehicle had deposited the satellite in transfer orbit on March 29. It was to be placed in final orbit today. . "After the successful long-duration firings, the communication from the satellite was lost when it (satellite) was on course for the final firing (to place the satellite in its final geostationary orbit), scheduled for April 1 (Sunday)," ISRO said in a statement. It added that efforts are on to re-establish links with the satellite. Only after re-establishing communications links with the satellite can it be put in final orbit.

ISRO says it has lost contact with its communications satellite GSAT-6A

ISRO is all set to launch GSLV-F08 carrying the GSAT6A communication satellite from Satish Dhawan Space Centre (SDSC) in Sriharikota at 4.56pm today.&nbsp

Today's launch will add another feather in ISRO's cap as it is mastering the technique of making home-made communication satellites. The GSAT-6A satellite will be put into orbit around 17 minutes after the rocket's lift off.&nbsp

According to the Indian Space Research Organisation, the real-time systems check operations have been completed.

The countdown began at 1.56 pm on Wednesday.

It is scheduled to blast off from the second launch pad at the Satish Dhawan Space Centre in Sriharikota, on Thursday.

GSAT-6A is similar to GSAT-6, a high power S-band communication satellite built on I-2K satellite bus with a mission life of about ten years, it said.

A key feature of the satellite is providing mobile communication to India through multibeam coverage facility.

The satellite will also provide a platform for developing technologies such as demonstration of 6 m S-Band Unfurlable Antenna, handheld ground terminals and network management techniques that could be useful in satellite-based mobile communication applications.

GSLV-F08, weighing 415.6 tonnes with a height of 49.1 metre comes with notable improvements like induction of High Thrust Vikas Engine, electromechanical actuation system in place of the electro-hydraulic actuation system.

A key feature of the satellite is providing mobile communication to India through multibeam coverage facility.

ISRO is all set to launch GSLV-F08 carrying the GSAT6A communication satellite from Satish Dhawan Space Centre (SDSC) in Sriharikota at 4.56pm today. Today's launch will add another feather in ISRO's cap as it is mastering the technique of making home-made communication satellites. The GSAT-6A satellite will be put into orbit around 17 minutes after the rocket's lift off. According to the Indian Space Research Organisation, the real-time systems check operations have been completed. The countdown began at 1.56 pm on Wednesday. It is scheduled to blast off from the second launch pad at the Satish Dhawan Space Centre in Sriharikota, on Thursday. GSAT-6A is similar to GSAT-6, a high power S-band communication satellite built on I-2K satellite bus with a mission life of about ten years, it said. A key feature of the satellite is providing mobile communication to India through multibeam coverage facility. The satellite will also provide a platform for developing technologies such as demonstration of 6 m S-Band Unfurlable Antenna, handheld ground terminals and network management techniques that could be useful in satellite-based mobile communication applications. GSLV-F08, weighing 415.6 tonnes with a height of 49.1 metre comes with notable improvements like induction of High Thrust Vikas Engine, electromechanical actuation system in place of the electro-hydraulic actuation system.

ISRO’s GSAT-6A launch: All you need to know

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GSAT-6A: 3 days on, ISRO yet to re-establish link with the communication satellite

GSAT-6A could become 'space debris' if link not established: Experts

ISRO loses contact with GSAT-6A, trying to establish link

ISRO says it has lost contact with its communications satellite GSAT-6A

ISRO’s GSAT-6A launch: All you need to know