PSLV-C-17(GSAT-12) Successfully Launched, Satellite in Orbit
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India notches another space success - The Economic Times
SRIHARIKOTA (Andhra Pradesh): India notched another milestone in its space programme on Friday evening when it successfully launched a heavy-duty rocket that placed a major communications satellite in space.
A beaming Indian Space Research Organisation (ISRO) chief K Radhakrishnan told reporters after the 4.48 p.m. launch Friday that the mission was a success.
"It is a tricky mission. I am extremely happy to state that the PSLV (Polar Satellite Launch Vehicle)-C17 GSAT-12 mission is successful. The satellite was launched in the intended orbit," he said at the launch site here, 80 km north of Tamil Nadu's capital Chennai.
V Narayanasamy, Minister of State in the Prime Minister's Office, said: "I am extremely happy (at the successful launch). I am coming here for the second time, and it is a second successful launch. On behalf of the prime minister, UPA chairperson Sonia Gandhi, I congratulate the ISRO scientists for the wonderful performance."
The PSLV blasted off successfully at 4.48 p.m., carrying the 1,410 kg GSAT-12 satellite from the spaceport here. The satellite has a life span of about seven years.
With this, India added 12 more communication transponders to its space-based network.
The launch took place under a cloudy sky, with the Rs 95 crore rocket PSLV-C17, measuring 44 metres in height and weighing 320 tonnes, soaring off into space with a roar. It ferried the Rs 105 crore GSAT-12 having 12 extended C-band transponders, automatic receivers and transmitters for communication and broadcast of signals.
With a rich orange flame at its rear, the one-way ticket rocket left behind a huge tail of white plume as it rose into the sky to the cheers of ISRO scientists and media team assembled at the launch centre. People perched atop of the nearby buildings too happily applauded as PSLV-C17 went up.
Around 20 minutes after the blast off, the rocket achieved its mission by placing the latest Indian communication satellite in the intended sub geosynchronous transfer orbit (sub GTO).
The GTO is an intermediate orbit from where normally communication satellites will be moved to its final geosynchronous orbit by firing the on-board motors. Radhakrishnan said the rocket's navigation systems were powered by Indian-made advanced Vikram processors.
"We needed to make modifications in the rocket's navigational software for this mission," Radhakrishnan said.
The GSAT-12 carries around 851 kg of fuel on-board to fire the motors. (A geosynchronous orbit is one directly above the earths' equator. For an observer from the earth a satellite in geosynchronous orbit will seem motionless, stationary at one point in the sky).
The rocket placed the satellite in sub GTO with a 284 km perigee (nearest point to earth) and 22,020 km apogee (farthest point from the earth). The satellite will be raised to 36,000 km apogee from 22,020 km over the next two days. The satellite will be useful for various communication services like tele-education, tele-medicine and for village resource centres, Radhakrishnan said.
The GSAT-12 satellite is also expected to serve the Very Small Aperture Terminal (V-SAT) sector. VSATs are used to transmit data like point of sale transactions or to provide satellite internet access. T.K. Alex, director of ISRO Satellite Centre , said the initial operations after putting the satellite in orbit went of smoothly.
"The solar panels were deployed and are generating power. The satellite orbit will be raised from 22,020 km apogee to 36,000 km apogee tomorrow and day after. All the 12 transponders in the satellite will be tested by the end of this month," Alex said.
He said there will be sufficient fuel left in GSAT-12 after carrying raising its orbit to 36,000 km apogee so that it can be in operation for seven years. Immediately after satellite ejection, ISRO with its network of ground stations monitored its health.
The satellite will augment transponder capacity of Indian National Satellite (Insat) system which at present comprises of eight satellites, Insat-2E, Insat-3A, Insat-3C, Insat-3E, Insat-4A, Insat-4B (working at 50 percent capacity) Insat-4CR and GSAT-8 providing 175 transponders in the S, C, extend C and Ku bands.
The Indian space agency has leased 86 more transponders from various foreign satellites. It is estimated there is an unmet demand for 170 transponders.
ISRO used its third PSLV rocket variant, PSLV-XL, with longer strap-on motors with higher fuel capacity, to put the latest communication satellite in the space.
The other two rocket variants are the PSLV standard with 11.3 metres six strap-on motors and the PSLV Core Alone (CA) rocket without the six strap-on motors.
The PSLV-C17 that went up Friday had 13.5 metres long strap-on motors carrying 12 tonnes of solid fuel than the normal strap-on motors measuring 11.3 metres with nine-tonne fuel capacity.
This is the second time ISRO has launched a rocket with this specification. The earlier one was for the Chandrayaan moon mission.
This is also only the second time ISRO is using a PSLV rocket for launching a satellite to be finally placed in geostationary orbit. The first satellite was Kalpana-1 (originally named as Metsat), a meteorological satellite launched in 2002.
The PSLV has an excellent success record since 1994, launching many Indian and foreign satellites.
ISRO officials told IANS that a remote sensing satellite - Megha-Tropiques - is being planned for launch later this year.
SRIHARIKOTA (Andhra Pradesh): India notched another milestone in its space programme on Friday evening when it successfully launched a heavy-duty rocket that placed a major communications satellite in space.
A beaming Indian Space Research Organisation (ISRO) chief K Radhakrishnan told reporters after the 4.48 p.m. launch Friday that the mission was a success.
"It is a tricky mission. I am extremely happy to state that the PSLV (Polar Satellite Launch Vehicle)-C17 GSAT-12 mission is successful. The satellite was launched in the intended orbit," he said at the launch site here, 80 km north of Tamil Nadu's capital Chennai.
V Narayanasamy, Minister of State in the Prime Minister's Office, said: "I am extremely happy (at the successful launch). I am coming here for the second time, and it is a second successful launch. On behalf of the prime minister, UPA chairperson Sonia Gandhi, I congratulate the ISRO scientists for the wonderful performance."
The PSLV blasted off successfully at 4.48 p.m., carrying the 1,410 kg GSAT-12 satellite from the spaceport here. The satellite has a life span of about seven years.
With this, India added 12 more communication transponders to its space-based network.
The launch took place under a cloudy sky, with the Rs 95 crore rocket PSLV-C17, measuring 44 metres in height and weighing 320 tonnes, soaring off into space with a roar. It ferried the Rs 105 crore GSAT-12 having 12 extended C-band transponders, automatic receivers and transmitters for communication and broadcast of signals.
With a rich orange flame at its rear, the one-way ticket rocket left behind a huge tail of white plume as it rose into the sky to the cheers of ISRO scientists and media team assembled at the launch centre. People perched atop of the nearby buildings too happily applauded as PSLV-C17 went up.
Around 20 minutes after the blast off, the rocket achieved its mission by placing the latest Indian communication satellite in the intended sub geosynchronous transfer orbit (sub GTO).
The GTO is an intermediate orbit from where normally communication satellites will be moved to its final geosynchronous orbit by firing the on-board motors. Radhakrishnan said the rocket's navigation systems were powered by Indian-made advanced Vikram processors.
"We needed to make modifications in the rocket's navigational software for this mission," Radhakrishnan said.
The GSAT-12 carries around 851 kg of fuel on-board to fire the motors. (A geosynchronous orbit is one directly above the earths' equator. For an observer from the earth a satellite in geosynchronous orbit will seem motionless, stationary at one point in the sky).
The rocket placed the satellite in sub GTO with a 284 km perigee (nearest point to earth) and 22,020 km apogee (farthest point from the earth). The satellite will be raised to 36,000 km apogee from 22,020 km over the next two days. The satellite will be useful for various communication services like tele-education, tele-medicine and for village resource centres, Radhakrishnan said.
The GSAT-12 satellite is also expected to serve the Very Small Aperture Terminal (V-SAT) sector. VSATs are used to transmit data like point of sale transactions or to provide satellite internet access. T.K. Alex, director of ISRO Satellite Centre , said the initial operations after putting the satellite in orbit went of smoothly.
"The solar panels were deployed and are generating power. The satellite orbit will be raised from 22,020 km apogee to 36,000 km apogee tomorrow and day after. All the 12 transponders in the satellite will be tested by the end of this month," Alex said.
He said there will be sufficient fuel left in GSAT-12 after carrying raising its orbit to 36,000 km apogee so that it can be in operation for seven years. Immediately after satellite ejection, ISRO with its network of ground stations monitored its health.
The satellite will augment transponder capacity of Indian National Satellite (Insat) system which at present comprises of eight satellites, Insat-2E, Insat-3A, Insat-3C, Insat-3E, Insat-4A, Insat-4B (working at 50 percent capacity) Insat-4CR and GSAT-8 providing 175 transponders in the S, C, extend C and Ku bands.
The Indian space agency has leased 86 more transponders from various foreign satellites. It is estimated there is an unmet demand for 170 transponders.
ISRO used its third PSLV rocket variant, PSLV-XL, with longer strap-on motors with higher fuel capacity, to put the latest communication satellite in the space.
The other two rocket variants are the PSLV standard with 11.3 metres six strap-on motors and the PSLV Core Alone (CA) rocket without the six strap-on motors.
The PSLV-C17 that went up Friday had 13.5 metres long strap-on motors carrying 12 tonnes of solid fuel than the normal strap-on motors measuring 11.3 metres with nine-tonne fuel capacity.
This is the second time ISRO has launched a rocket with this specification. The earlier one was for the Chandrayaan moon mission.
This is also only the second time ISRO is using a PSLV rocket for launching a satellite to be finally placed in geostationary orbit. The first satellite was Kalpana-1 (originally named as Metsat), a meteorological satellite launched in 2002.
The PSLV has an excellent success record since 1994, launching many Indian and foreign satellites.
ISRO officials told IANS that a remote sensing satellite - Megha-Tropiques - is being planned for launch later this year.
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Actually this is just a start and we need much more satellites like this.
The vision/objective was to have around 500 transponders by 2012 and right now they only have aboyut 175 or so.
SO many more satellites are needed and we cannot afford to have PSLV launcjes because of the weight constraints and the resulting budgetary constraints.
The more powerful GSLV is needed so that we can launch bigger satellites with more transponders in one go rather than in piecemeal fashion using PSLV.
The vision/objective was to have around 500 transponders by 2012 and right now they only have aboyut 175 or so.
SO many more satellites are needed and we cannot afford to have PSLV launcjes because of the weight constraints and the resulting budgetary constraints.
The more powerful GSLV is needed so that we can launch bigger satellites with more transponders in one go rather than in piecemeal fashion using PSLV.
The PSLV is a proud symbol of ISRO's self-reliance
Source : The Hindu : Home Page News & Features
This is the third time it is putting a satellite in a geo-synchronous transfer orbit; Chandrayaan-1 mission experience fruitful
India's Polar Satellite Launch Vehicle proved its versatility and reliability once again when the PSLV-C17 put the communication satellite GSAT-12 in a perfect orbit on Friday. The rocket roared off the second launch pad from the spaceport here on the dot at 4.48 p.m. and effortlessly lobbed the 1,310-kg satellite in orbit after a 20-minute eventless flight.
This is the 18th successful flight of the PSLV in a row and this is the third time that it is putting a satellite in a geo-synchronous transfer orbit (GTO), which is a tricky business. And the PSLV proved its versatility because it is the more powerful XL version of the PSLV that put the GSAT-12 in orbit. There are three versions of the PSLV — the standard, the core-alone without the six strap-on booster motors, and the XL version, which carries more solid fuel in its strap-on motors than the standard version. All the three versions have proved to be unalloyed successes. An XL version had successfully put Chandrayaan-1 in a GTO in October 2008.
There were thick clouds as the PSLV-C17 lifted off majestically and disappeared into the clouds after a few seconds. It was a flawless mission with the four stages of the PSLV-C17 igniting and separating on time and the fourth stage putting the satellite accurately in orbit.
"Important mission"
K. Radhakrishnan, Chairman, Indian Space Research Organisation (ISRO), called it an "important mission, both from the technological angle and for the people of the country." The mission was so perfect that the rocket put the satellite in a sub-GTO with an apogee of 21,020 km against the planned 21,000 km and a perigee of 284 km against a targeted 281 km. The GSAT-12 with its 12 extended C-band transponders would be used in tele-medicine, tele-education, village resource centres and supporting disaster management. Though putting the GSAT-12 in a sub-GTO was "a tricky mission," Dr. Radhakrishnan said, the ISRO was successful in doing it with the experience gained from the Chandrayaan-1 mission.
P.S. Veeraraghavan, Director, Vikram Sarabhai Space Centre, Thiruvananthapuram, called the PSLV "a proud symbol of ISRO's self-reliance."
T.K. Alex, Director, ISRO Satellite Centre, Bangalore, said the GSAT-12's solar panels were deployed, they started rotating and commands were given to turn the panels towards the Sun to generate power.
Source : The Hindu : Home Page News & Features
This is the third time it is putting a satellite in a geo-synchronous transfer orbit; Chandrayaan-1 mission experience fruitful
India's Polar Satellite Launch Vehicle proved its versatility and reliability once again when the PSLV-C17 put the communication satellite GSAT-12 in a perfect orbit on Friday. The rocket roared off the second launch pad from the spaceport here on the dot at 4.48 p.m. and effortlessly lobbed the 1,310-kg satellite in orbit after a 20-minute eventless flight.
This is the 18th successful flight of the PSLV in a row and this is the third time that it is putting a satellite in a geo-synchronous transfer orbit (GTO), which is a tricky business. And the PSLV proved its versatility because it is the more powerful XL version of the PSLV that put the GSAT-12 in orbit. There are three versions of the PSLV — the standard, the core-alone without the six strap-on booster motors, and the XL version, which carries more solid fuel in its strap-on motors than the standard version. All the three versions have proved to be unalloyed successes. An XL version had successfully put Chandrayaan-1 in a GTO in October 2008.
There were thick clouds as the PSLV-C17 lifted off majestically and disappeared into the clouds after a few seconds. It was a flawless mission with the four stages of the PSLV-C17 igniting and separating on time and the fourth stage putting the satellite accurately in orbit.
"Important mission"
K. Radhakrishnan, Chairman, Indian Space Research Organisation (ISRO), called it an "important mission, both from the technological angle and for the people of the country." The mission was so perfect that the rocket put the satellite in a sub-GTO with an apogee of 21,020 km against the planned 21,000 km and a perigee of 284 km against a targeted 281 km. The GSAT-12 with its 12 extended C-band transponders would be used in tele-medicine, tele-education, village resource centres and supporting disaster management. Though putting the GSAT-12 in a sub-GTO was "a tricky mission," Dr. Radhakrishnan said, the ISRO was successful in doing it with the experience gained from the Chandrayaan-1 mission.
P.S. Veeraraghavan, Director, Vikram Sarabhai Space Centre, Thiruvananthapuram, called the PSLV "a proud symbol of ISRO's self-reliance."
T.K. Alex, Director, ISRO Satellite Centre, Bangalore, said the GSAT-12's solar panels were deployed, they started rotating and commands were given to turn the panels towards the Sun to generate power.
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ISRO's GSAT-12: three women scientists to be in charge of crucial manoeuvres
ISRO GSAT-12 PSLV-C17
Posted On: Jul 17, 2011
PSLV C-17 takes off during its launch from the Sathish Dhawan Space Centre in Srihakota, Andhra Pradesh on Friday. Photo: PTI.
CHENNAI (PTI): For the first time in the history of the Indian Space Research Organisation, three senior women scientists will monitor and carry out crucial manoeuvres of the communication satellite GSAT-12 which was launched on Friday.
GSAT-12 Project Director T K Anuradha, Mission Director Pramodha Hegde and Operations Director K S Anuradha, who have been with ISRO for over two decades, will be involved in crucial tasks in the coming days before the satellite is declared operational in four to six weeks.
An elated T K Anuradha said every activity of the satellite was "challenging" and the next few days would be crucial as it involves tasks including deployment of antenna and switching on of Liquid Apogee Motor (LAM) firing for orbit raising manoeuvres.
"(Mission Director) Pramodha Hegde and (Operations Director) K S Anuradha and myself will monitor the satellite for carrying all significant activities from the Master Control Facility (MCF) at Hassan (Karnataka)", Anuradha said.
While the initial process would involve taking the satellite to the intended 36,000 km from 282 km (apogee - farthest point to Earth) and 21,020 km (perigee - closest point to Earth), she said over the next few days, the critical manoeuvre would take it to a geostationary orbit to 36,000 km.
After this, the antenna would be deployed, she said.
In orbit testing of payloads (12 Extended "C" band transponders) will be carried out and characterised from MCF, Anuradha said before leaving for Hassan, 200 km from Bangalore.
ISRO Space Commission member and Director T K Alex had said the three women would monitor the satellite from Hassan.
An ISRO official said this was the first time an all women team would be involved in such significant tasks. They will be assisted by teams having about 100 members.
"This is the first time senior women scientists will be engaged in such activity. They will be supported by scientists and engineers from ISRO Bangalore and Ahmedabad", he said.
GSAT-12 equipped with 12 Extended C-band transponders, would provide various services, including tele-medicine, tele-education and disaster management.
ISRO GSAT-12 PSLV-C17
Posted On: Jul 17, 2011
PSLV C-17 takes off during its launch from the Sathish Dhawan Space Centre in Srihakota, Andhra Pradesh on Friday. Photo: PTI.
CHENNAI (PTI): For the first time in the history of the Indian Space Research Organisation, three senior women scientists will monitor and carry out crucial manoeuvres of the communication satellite GSAT-12 which was launched on Friday.
GSAT-12 Project Director T K Anuradha, Mission Director Pramodha Hegde and Operations Director K S Anuradha, who have been with ISRO for over two decades, will be involved in crucial tasks in the coming days before the satellite is declared operational in four to six weeks.
An elated T K Anuradha said every activity of the satellite was "challenging" and the next few days would be crucial as it involves tasks including deployment of antenna and switching on of Liquid Apogee Motor (LAM) firing for orbit raising manoeuvres.
"(Mission Director) Pramodha Hegde and (Operations Director) K S Anuradha and myself will monitor the satellite for carrying all significant activities from the Master Control Facility (MCF) at Hassan (Karnataka)", Anuradha said.
While the initial process would involve taking the satellite to the intended 36,000 km from 282 km (apogee - farthest point to Earth) and 21,020 km (perigee - closest point to Earth), she said over the next few days, the critical manoeuvre would take it to a geostationary orbit to 36,000 km.
After this, the antenna would be deployed, she said.
In orbit testing of payloads (12 Extended "C" band transponders) will be carried out and characterised from MCF, Anuradha said before leaving for Hassan, 200 km from Bangalore.
ISRO Space Commission member and Director T K Alex had said the three women would monitor the satellite from Hassan.
An ISRO official said this was the first time an all women team would be involved in such significant tasks. They will be assisted by teams having about 100 members.
"This is the first time senior women scientists will be engaged in such activity. They will be supported by scientists and engineers from ISRO Bangalore and Ahmedabad", he said.
GSAT-12 equipped with 12 Extended C-band transponders, would provide various services, including tele-medicine, tele-education and disaster management.
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GSAT-12 reaches its home in a circular geo-synchronous orbit
Source : www.thehindu.com
India's communication satellite GSAT-12, put in orbit on July 15, reached its home in a circular geo-synchronous orbit at an altitude of 36,000 km on Tuesday. The Polar Satellite Launch Vehicle (PSLV-C17) of the Indian Space Research Organisation (ISRO), which lifted off from the space station at Sriharikota on July 15, 2011, put the 1,410 kg GSAT-12 in a sub geo-synchronous transfer orbit (sub-GTO) with an apogee of 21,020 km and a perigee of 284 km.
Challenging operation
After the satellite was put in a sub-GTO, the liquid apogee motor (LAM) on board was fired once each day from July 16-19 to circularise the orbit at an altitude of 36,000 km. On July 16 and 17, commands were given from the Master Control Facility (MCF) at Hassan in Karnataka to the LAM to take the satellite's apogee from 21,020 km to 36,000 km when the satellite was at its perigee. Similarly, the commands to the LAM to fire to take the perigee from 284 km to 36,000 km were given on July 18 and 19 when the satellite was at its apogee. "Thus, it was a challenging operation," said an ISRO official.
"But all operations went off well. The sub-systems on board the satellite are functioning normally. The satellite has now made it to its final, circular geo-synchronous orbit of 36,000 km," he added.
The LAM will be fired again on Wednesday for final trimming of the satellite's orbit.
With 12 extended C-band transponders, the satellite will be useful in tele-education, tele-medicine, disaster management support, telephone services and so on.
Two more this year
This year ISRO will launch two more satellites.
It is now getting ready for the launch of Megha-Tropiques satellite, an Indo-French joint venture, from the spaceport at Sriharikota by the end of September.
The PSLV-C18 will put the 1,000-kg Megha-Tropiques (Megha in Sanskrit means cloud and Tropiques in French means tropics), being built by the ISRO Satellite Centre, Bangalore, into an 867 km orbit. It will be useful in studying the weather in tropical countries.
For surveillance
ISRO is also building for surveillance, RISAT-1 (Radar Imaging Satellite) which will be put in orbit by the end of December by PSLV-C19.
It can take pictures of the earth day and night and in all weather conditions.
Source : www.thehindu.com
India's communication satellite GSAT-12, put in orbit on July 15, reached its home in a circular geo-synchronous orbit at an altitude of 36,000 km on Tuesday. The Polar Satellite Launch Vehicle (PSLV-C17) of the Indian Space Research Organisation (ISRO), which lifted off from the space station at Sriharikota on July 15, 2011, put the 1,410 kg GSAT-12 in a sub geo-synchronous transfer orbit (sub-GTO) with an apogee of 21,020 km and a perigee of 284 km.
Challenging operation
After the satellite was put in a sub-GTO, the liquid apogee motor (LAM) on board was fired once each day from July 16-19 to circularise the orbit at an altitude of 36,000 km. On July 16 and 17, commands were given from the Master Control Facility (MCF) at Hassan in Karnataka to the LAM to take the satellite's apogee from 21,020 km to 36,000 km when the satellite was at its perigee. Similarly, the commands to the LAM to fire to take the perigee from 284 km to 36,000 km were given on July 18 and 19 when the satellite was at its apogee. "Thus, it was a challenging operation," said an ISRO official.
"But all operations went off well. The sub-systems on board the satellite are functioning normally. The satellite has now made it to its final, circular geo-synchronous orbit of 36,000 km," he added.
The LAM will be fired again on Wednesday for final trimming of the satellite's orbit.
With 12 extended C-band transponders, the satellite will be useful in tele-education, tele-medicine, disaster management support, telephone services and so on.
Two more this year
This year ISRO will launch two more satellites.
It is now getting ready for the launch of Megha-Tropiques satellite, an Indo-French joint venture, from the spaceport at Sriharikota by the end of September.
The PSLV-C18 will put the 1,000-kg Megha-Tropiques (Megha in Sanskrit means cloud and Tropiques in French means tropics), being built by the ISRO Satellite Centre, Bangalore, into an 867 km orbit. It will be useful in studying the weather in tropical countries.
For surveillance
ISRO is also building for surveillance, RISAT-1 (Radar Imaging Satellite) which will be put in orbit by the end of December by PSLV-C19.
It can take pictures of the earth day and night and in all weather conditions.
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ISRO PRESS release:JULY21,2011
GSAT-12 Communication Satellite placed in Geosynchronous Orbit
The GSAT-12 Communication Satellite, launched onboard Polar Satellite Launch Vehicle (PSLV-C17), has been successfully placed in Geosynchronous Orbit with a perigee of 35,684 km, apogee of 35,715 km and an orbital inclination of 0.17 deg with respect to the equatorial plane.
It may be recalled that on July 15, 2011, PSLV-C17 had injected GSAT-12 into an elliptical transfer orbit of 281 km perigee and 21,027 km apogee, and orbital inclination of 17.9 deg. The critical manoeuvres to raise GSAT-12 Satellite into Geosynchronous Orbit were performed by firing the 440 Newton Liquid Apogee Motor of GSAT-12 Satellite for about 80 minutes in five spells during July 16-20, 2011.
The Communication antenna onboard the satellite was deployed successfully today (July 21, 2011) at 15:30 hrs (IST) and the Satellite is in its final orbital configuration, pointing towards Earth.
GSAT-12 is now located at 63 deg East longitude. The Satellite would be moved to reach its designated longitude of 83 degree East within the next 16 days (at the rate of one degree per day). The GSAT-12 Satellite will be co-located with INSAT-2E and INSAT-4A Satellites.
After parking the Satellite at this location, the Communication Transponders are planned to be switched on by August 5, 2011, followed by In-Orbit Testing. The GSAT-12 Satellite is in good health and is in continuous radio-visibility from ISROs Master Control Facility, Hassan.
GSAT-12 Communication Satellite placed in Geosynchronous Orbit
The GSAT-12 Communication Satellite, launched onboard Polar Satellite Launch Vehicle (PSLV-C17), has been successfully placed in Geosynchronous Orbit with a perigee of 35,684 km, apogee of 35,715 km and an orbital inclination of 0.17 deg with respect to the equatorial plane.
It may be recalled that on July 15, 2011, PSLV-C17 had injected GSAT-12 into an elliptical transfer orbit of 281 km perigee and 21,027 km apogee, and orbital inclination of 17.9 deg. The critical manoeuvres to raise GSAT-12 Satellite into Geosynchronous Orbit were performed by firing the 440 Newton Liquid Apogee Motor of GSAT-12 Satellite for about 80 minutes in five spells during July 16-20, 2011.
The Communication antenna onboard the satellite was deployed successfully today (July 21, 2011) at 15:30 hrs (IST) and the Satellite is in its final orbital configuration, pointing towards Earth.
GSAT-12 is now located at 63 deg East longitude. The Satellite would be moved to reach its designated longitude of 83 degree East within the next 16 days (at the rate of one degree per day). The GSAT-12 Satellite will be co-located with INSAT-2E and INSAT-4A Satellites.
After parking the Satellite at this location, the Communication Transponders are planned to be switched on by August 5, 2011, followed by In-Orbit Testing. The GSAT-12 Satellite is in good health and is in continuous radio-visibility from ISROs Master Control Facility, Hassan.
Antenna of GSAT-12 deployed
Source : The Hindu : Home Page News & Features
The antenna of communications satellite GSAT-12 was deployed on Thursday afternoon, to much applause from the Indian Space Research Organisation's Master Control Facility (MCF) at Hassan in Karnataka.
The satellite, launched on July 15, will now reach its final orbital destination, at 83 degrees east and pointing at India, on August 6.
Commercial use
ISRO Chairman K. Radhakrishnan said the satellite's 12 transponders would be put through a series of in-orbital tests and they would be considered fully operational for commercial use after four to five weeks.
Final deployment
GSAT 12 will facilitate telemedicine, tele-education and village resource centres. The 1.2-metre reflector antenna was the final deployment of the satellite, which is now in the final configuration of 36,000-km circular orbit. It will be co-located with INSAT-2E and INSAT-4A.
"GSAT-12 is in good health and is on continuous radio-visibility from the MCF," Dr. Radhakrishnan said at a press conference at the MCF. There was, however, a moment of concern when GSAT-12 sounded an alarm on Thursday morning. "Communication was cut off for a few seconds, but immediate remedial action was taken," he said. The alarm was caused by radiation. All operations were now going well, he added.
The MCF's 300-odd scientists and engineers work three shifts and monitor satellites by the minute.
Source : The Hindu : Home Page News & Features
The antenna of communications satellite GSAT-12 was deployed on Thursday afternoon, to much applause from the Indian Space Research Organisation's Master Control Facility (MCF) at Hassan in Karnataka.
The satellite, launched on July 15, will now reach its final orbital destination, at 83 degrees east and pointing at India, on August 6.
Commercial use
ISRO Chairman K. Radhakrishnan said the satellite's 12 transponders would be put through a series of in-orbital tests and they would be considered fully operational for commercial use after four to five weeks.
Final deployment
GSAT 12 will facilitate telemedicine, tele-education and village resource centres. The 1.2-metre reflector antenna was the final deployment of the satellite, which is now in the final configuration of 36,000-km circular orbit. It will be co-located with INSAT-2E and INSAT-4A.
"GSAT-12 is in good health and is on continuous radio-visibility from the MCF," Dr. Radhakrishnan said at a press conference at the MCF. There was, however, a moment of concern when GSAT-12 sounded an alarm on Thursday morning. "Communication was cut off for a few seconds, but immediate remedial action was taken," he said. The alarm was caused by radiation. All operations were now going well, he added.
The MCF's 300-odd scientists and engineers work three shifts and monitor satellites by the minute.
