http://timesofindia.indiatimes.com/india/ISRO-to-launch-three-satellites-in-1st-quarter-of-2011-/articleshow/7305925.cms
ЦитироватьISRO to launch three satellites in 1st quarter of 2011
PTI, Jan 17, 2011, 08.24pm IST
THIRUVANANTHAPURAM: ISRO has planned three major missions, including launch of advanced remote sensing satellite Resourcesat-2, in the next three months.
"The coming three months are going to be eventful with three major milestones to be achieved," ISRO chairman K Radhakrishnan told an international conference here.
He said homegrown PSLV-C16 launch vehicle has been assembled at Sriharikota spaceport and Resourcesat-2 and Youthsat, with advanced optical payloads, are being readied for shipment there for launch.
PSLV-C17 assembly would commence soon for geostationary transfer orbit mission to launch GSAT-12, a communication satellite, to be immediately followed by four PSLVs and flight testing of Indian cryogenics stage after tests on ground.
Another communication satellite GSAT-8 is getting ready for launch onboard European rocket Ariane-5 in April-May 2011.
'Resourcesat-2', 'Youthsat', a participatory scientific mission with payloads from Russia and India and X-sat, Singapore's first indigenous satellite, will be launched on board homegrown PSLV C-16, he said.
"We have three major missions slated to be done in coming February, March and April. Among them Resourcesat-2 is meant to replace Resourcesat-1, launched in 2003, to provide data connectivity," Radhakrishnan said.
'Youthsat' would carry a payload developed by students of Moscow university in Russia," he told the meet organised by Indian Institute of Space Science and Technology (IIST) and Optical Society of India (OSI).
http://www.isro.org/scripts/futureprogramme.aspx
ЦитироватьGSAT-12 is being realised as replacement INSAT-3B. The satellite will carry 12 Extended C-band transponders and will be positioned at 83
http://articles.economictimes.indiatimes.com/2011-04-17/news/29427862_1_gsat-8-pslv-rocket-gsat-12
ЦитироватьISRO will then launch two communication satellites - GSAT-8 from French Guyana and GSAT-12 from India - by June this year. These will serve the needs of the telecommunication and television sectors.
Speaking to IANS, an ISRO official, who did not want to be named, said GSAT-8 will augment the growing demand for communication transponders (automatic receivers and transmitters for communication and broadcast of signals).
With India in the process of developing a rocket that could carry a three-tonne satellite, GSAT-8 will be launched by Ariane rocket from French Guyana some time this May.
Following that will be the launch of GSAT-12 using the Polar Satellite Launch Vehicle (PSLV) from ISRO's rocket port at Sriharikota in Andhra Pradesh, around 80 km from Chennai.
Weighing 1,425 kg, GSAT-12, with 12 extended C band transponders, is expected to be launched some time in June.
The satellite is expected to serve the Very Small Aperture Terminal ( VSAT) sector, used to transmit data like point of sale transactions or to provide satellite internet access and others.
Though PSLV rockets are largely used by ISRO to launch remote sensing/earth observation satellites, it has also been used to put into orbit communication satellites in geo transfer orbit (GTO).
According to ISRO officials, the PSLV rocket that will carry GSAT-12 will weigh over 300 tonnes - heavier than the standard PSLV rocket that weigh around 290 tonnes at lift off.
The rocket will be powered with much longer strap-on motors containing more fuel.
http://www.deccanchronicle.com/node/23871
ЦитироватьAbout the Isro's future missions, Dr Radhakrishnan said that Isro would be launching a series of communication and remote sensing satellites using PSLV between June and December this year. PSLV C-17 will carry GSAT-12 with 12 extended C-band transponders on board
http://www.hindu.com/2011/04/21/stories/2011042157600900.htm
ЦитироватьP.S. Veeraraghavan, Director, Vikram Sarabhai Space Centre, Thiruvananthapuram, said ISRO would launch several satellites from Sriharikota in the coming months. The PSLV-C17 would put in orbit India's communication satellite, GSAT-12, by June end or in the first week of July.
http://isro.gov.in/rep2011/citizens.htm
ЦитироватьGSAT-12
GSAT-12 spacecraft is configured as a replacement of INSAT-3B and carries 12 Extended C band transponders. GSAT-12 is configured on well proven I-1K bus structure with the power handling capability of around 919 watts with a lift off mass of about 1400kg.
Major Spacecraft subsystems and Payloads have been delivered and spacecraft level integration is in progress. HILS test is in progress in the newly set-up HILS facility at ISITE. GSAT-12 is scheduled for launch onboard PSLV during 2011.
(http://isro.gov.in/rep2011/images/GSAT-12-INTEGRATION-IN-PROGRESS.jpg)
GSAT-12 integration in progress
http://www.thehindu.com/news/states/tamil-nadu/article1819659.ece
ЦитироватьPSLV C-17 will be launched in July and it will carry GSAT-12, a communication satellite.
http://www.inright.ru/news/science/20110518/id_7400/
ЦитироватьИндия произведет три космических запуска до конца нынешнего года[/size]
18 мая 2011 г.
Press Trust of India (Индия)/InterRight/telugushakthi.net
Индийское космическое агентство намерено до конца года произвести три запуска ракетоносителя PSLV. Запуски будут производиться с космодрома Шрихарикота в штате Андхра-прадеш, и намечены на июль, сентябрь и октябрь 2011 года. Кроме того, 20 мая французская ракета Ariane-5 должна вывести в космос еще один индийский спутник.
Первым состоится запуск ракеты PSLV-C17, на орбиту будет выведен филиппинский телекоммуникационный спутник GSAT-12. Затем в сентябре-октябре в космос отправятся ракеты PSLV-C18 и PSLV-C19. Запуски пройдут в рамках совместного французско-индийского проекта. На орбиту будут выведены метеорологические спутники Megha-tropiques и RISAT-1.
http://www.hindu.com/2011/06/02/stories/2011060267091500.htm
ЦитироватьGSAT-12 to be launched in July second week[/size]
(http://www.hindu.com/2011/06/02/images/2011060267091501.jpg)
— Photo: V. Sreenivasa Murthy
ISRO Chairman K. Radhakrishnan addresses the media in Bangalore on Wednesday. The former ISRO chairman, Madhavan Nair, is at right.
BANGALORE: On the heels of the successful launch of its communication satellite GSAT-8, the Indian Space Research Organisation (ISRO) is gearing up to launch the next communication satellite GSAT-12 in the second week of July.
Announcing this at a news conference here on Wednesday, ISRO Chairman K. Radhakrishnan said the satellite would be launched from Sriharikota on a PSLV C-17 vehicle.
It would be moved from Bangalore to Sriharikota on Thursday for conducting various pre-launch tests. The assembling of the launch vehicle had also commenced.
GSAT-12, built at a cost of Rs.148 crore, has 12 transponders in an extended C-Band and will help users in the field of tele-medicine, tele-education, social services, etc. The launch vehicle was expected to cost about Rs.100 crore.
Dr. Radhakrishnan said the services of GSAT-8 satellite, launched on May 21, was expected to be available for users by June-end. In-orbit tests of transponders of the satellite would be held for three weeks, from Thursday. The satellite had been put on 55 degree east of geo-station orbit on Wednesday. Users of some of the decommissioned satellites would be moved to this, he said.
Referring to the recommendations made by a committee which looked into the failure of GSLV in December 2010 and another committee that examined the entire GSLV programme, Dr. Radhakrishnan said ISRO had now decided to "put all the focus" on developing indigenous cryogenic engines that powered Mark-II launch vehicles.
He said there were no major problems with respect to the design.
However, discussions had started with Russia regarding finetuning of the engine procured from them.
Special Correspondent reports:
As a fall-out of the controversial S-Band deal, ISRO's commercial arm — Antrix Corporation — is all set to get a full-time Chairman and Managing Director in a couple of weeks. Dr. Radhakrishnan said the Space Commission had cleared the recommendation of the name made by a three-member committee, comprising himself, Principal Scientific Adviser to the Government of India R. Chidambaram, and Space Commission Member (Finance) Venkatesh Bhat and had been forwarded to the Prime Minister for clearance.
He said Antrix would be strengthened by getting more full-time experts with significant experience. Its performance would be reviewed every year by the Space Commission.
Besides, an ISRO team would monitor and coordinate with it, he noted.
Noted Scientist Roddam Narasimha, who is part of the two-member panel which probed the controversial Antrix-Devas deal, said the committee had submitted its report to the Prime Minister, but refused to divulge any details.
"We have done our duty. Let the Prime Minister take a decision on the report."
http://www.ciol.com/News/News/News-Reports/India-to-launch-next-comm-satellite-in-July/150701/0/
ЦитироватьGSAT-12 has been built at the space agency's satellite centre in this tech hub and will be shipped to Sriharikota in Andhra Pradesh Thursday.
"As we are using a polar launch vehicle to place the satellite in the geosynchronous orbit, the spacecraft will be first placed in the lower elliptical orbit between 284 km perigee (closer to earth) and 21,000 km apogee (away from earth) and subsequently transferred into the intended orbit in stages between 21,000 km perigee and 36,000 km apogee," Radhakrishnan said.
In the run-up to the launch mission, the rocket will be assembled at the Satish Dhawan Space Centre at Sriharikota and integrated with control systems and avionics.
"The solid and liquid stages are going through final checks before strapping them onto the rocket. The entire exercise, including assembling, integration and tests will be completed by June 26 for launching the mission in the second week of July," the chairman said.[/size]
http://forum.nasaspaceflight.com/index.php?topic=25379.msg763829#msg763829
ЦитироватьFrom NOTAMs, launch could occur from July 6 to August 5 in the 1015-1315UTC time slot
http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Jun30_2011
ЦитироватьJune 30, 2011
PSLV-C17 to Launch GSAT-12 on July 15, 2011 [/size]
Preparations for the forthcoming launch of Polar Satellite Launch Vehicle (PSLV-C17) carrying India's communication satellite GSAT-12 are progressing well at Satish Dhawan Space Centre, Sriharikota. The launch of PSLV-C17/GSAT-12 mission is targeted for July 15, 2011.
GSAT-12 Communication satellite with a mass of 1410 kg at lift-off, has 12 Extended C-band transponders. PSLV-C17 will inject GSAT-12 into an elliptical Transfer Orbit (Sub-GTO) of 284 km perigee and 21,000 km apogee. Subsequently, the Liquid Apogee Motor of the satellite will be used to raise both apogee and perigee of the Satellite to place it in a circular orbit of 36,000 km altitude.
All the four stages of the launch vehicle have been fully assembled at the Vehicle Assembly Building at Shriharikota. Presently, the vehicle is going through various levels of electrical checkout operations and reviews.
GSAT-12 satellite has already undergone necessary testing at Shriharikota before commencing the filling of propellants in the Satellite on June 28, 2011. On July 3, 2011, GSAT-12 Satellite is planned to be integrated with PSLV-C17 vehicle at the Vehicle Assembly Building, after clearance by the Launch Authorisation Board.
On July 10, 2011, PSLV-C17 Vehicle (with the GSAT-12 Satellite onboard) is planned to be moved from the Vehicle Assembly Building to the Second Launch Pad.
On July 13, 2011 the 52.5 hour Countdown for the launch is expected to commence after launch rehearsals, clearance from Mission Readiness Review Teams and Launch Authorisation Board.
The lift-off of PSLV-C17 from the second launch pad is scheduled on July 15, 2011 between 16:48 and 17:08 hrs.[/size]
http://www.rian.ru/science/20110630/395674562.html
ЦитироватьИндия запустит 15 июля спутник связи GSAT-12[/size]
16:48 30/06/2011
НЬЮ-ДЕЛИ, 30 июн - РИА Новости, Евгений Безека. Индия запустит 15 июля на ракете-носителе PSLV спутник связи GSAT-12, сообщила Индийская организация космических исследований (ИСРО).
Спутник GSAT-12 весит 1,41 тонны, оснащен 12 приемопередатчиками в расширенном С-диапазоне. Легкая индийская ракета PSLV стартует с космодрома на острове Шрихарикота и выведет спутник на геопереходную орбиту, после чего двигатель космического аппарата поднимет его на геостационарную орбиту.
Индия в этом году заявила о намерении запустить в ближайшие два года на орбиту десятки спутников, в том числе 12 иностранных. За последние 10 лет Индия отправила в космос 26 иностранных спутников для различных стран, включая Германию, Израиль, Южную Корею и Сингапур.
Предыдущий спутник серии GSAT с порядковым номером 8 был выведен на орбиту французской ракетой "Ариан" в мае 2011 года. Его масса составила 3,1 тонны (без учета топлива - 1,4 тонны). Этот космический аппарат оборудован 24 ретрансляторами, работающими в Ku-диапазоне. На спутнике установлена аппаратура индийской системы функционального дополнения GPS - GAGAN. Эта система позволит корректировать сигнал GPS на заданной территории и предназначена в первую очередь для нужд гражданской авиации.
Длина PSLV (Polar Satellite Launch Vehicle, ракета-носитель для вывода спутников на полярную орбиту) составляет 44 метра. Носитель приводят в движение четыре ступени, две из которых работают на твердом топливе, две - на жидком. Это самая надежная индийская ракета: из 18 ее запусков все, кроме самого первого, признаны успешными. С 1994 года PSLV доставили на орбиту более 40 спутников.[/size]
http://www.crazyengineers.com/pslv-c17-to-launch-gsat-12-on-july-15-2011-542/
(http://global.crazyengineers.com/wp-content/uploads/2011/07/GSAT-12-PSLV-C-17-ISRO.jpg)
http://www.dailyindia.com/show/450054.php
ЦитироватьIndia to launch communication satellite GSAT-12 on July 15[/size]
From ANI
New Delhi, July 9(ANI): Indian Space Research Organisation (ISRO) will launch communication satellite GSAT-12 on July 15, Chairman K. Radhakrishnan said today in Bangalore.
"The countdown would start on July 13 at 12.18 hours (Indian Standard Time). The countdown for the PSLV is 15.13 hours and lift-off is scheduled on July 15 between 16.48 and 17.08 hours," Radhakrishnan said.
He also noted that the communication satellites are already positioned at the Satish Dhawan Space Centre/Sri Harikota Range/(SHAR) in Andhra Pradesh.
"The PSLV-C17 (Polar Satellite Launch Vehicle) vehicle and GSAT-12 Communication Satellite are at Sriharikota. The satellite has been integrated with the vehicle. The total electric testing of the vehicle with the satellite has been carried out," Radhakrishnan said.
He also mentioned that Dr. V S Hegde, a veteran remote sensing applications scientist, has been appointed as Chairman-cum-Managing Director of Antrix Corporation Limited, the commercial arm of the ISRO.
"From the value transfer that they are doing at the moment, the possibility of value creation by Antrix is one agenda in front of Dr. Hegde. How to improve the technology transfer process from ISRO (Indian Space Research Organisation) to non-space application is another major activity that he would be undertaking," he said.
The satellite, with a mass of 1410 kg at lift-off, has 12 extended C-band transponders.[/size]
http://www.thehindu.com/sci-tech/science/article2210877.ece?homepage=true
ЦитироватьBangalore, Июль 8, 2011
Most-powerful PSLV to launch GSAT-12 next week[/size]
(http://www.thehindu.com/multimedia/dynamic/00688/08TH_RADHAKRISHNAN1_688872f.jpg)
ISRO Chairman K. Radhakrishnan. File photo
Indian Space Research Organisation is using the most powerful configuration of its rocket PSLV to launch a communication satellite from Sriharikota on July 15 as it braces for the nearly Rs. 200 crore mission.
It's only for the second time ever that a Polar Satellite Launch Vehicle is being used to loft a communication satellite, the first one being Kalpana-1 in 2002.
Bangalore-headquartered ISRO opted for this step as there is a large unfulfilled and pressing demand for communication transponders.
Communication satellites are launched on board GSLV or ISRO goes in procured launches overseas.
"But we wanted to create (transponder) capacity at the earliest. That's why we used the PSLV for the purpose (of launching a communication satellite), and achieve whatever is possible...best possible by a PSLV with XL configuration. That's the most powerful configuration," ISRO Chairman K. Radhakrishnan told PTI in Bangalore.
The GSAT-12 "fast-track" satellite with a mass of 1410 kg, has 12 Extended C-band transponders. It is slated to be injected into space by PSLV-C17 after the launch from Sriharikota spaceport slated between 16.48 hours and 17.08 hours on July 15.
Similar PSLV, with extended strap-ons, was used for India's Chandrayaan-1 mission.
On the PSLV-C17/GSAT-12 mission cost, Mr. Radhakrishnan said, "Launch vehicle of PSLV of XL-class will cost about Rs 100-Rs 110 crore, and GSAT-12 will be about Rs 80 crore. The life of the satellite will be about 7-8 years." Mr. Radhakrishnan said in the beginning of the 11th plan, ISRO had 211 transponders, and the target then set was to take it to almost 500 by March 2012, which is end of the plan period.
But except for 24 transponders added by GSAT-8 which was operationalised recently, ISRO had not been able to enhance these numbers since September 2007.
"During the period, most of our satellites have either completed their normal life or there were premature terminations," he said. "So, this resulted in the 211 becoming 175 now. There is a lot of unfulfilled demand to be met." To meet this growing demand, Bangalore-headquartered ISRO is building GSAT-10 with 36 transponders and it would be launched by Arianespace from Kourou in French Guiana during March-April next year.
"We are also building another satellite GSAT-7 that will have a few more transponders," Mr. Radhakrishnan added.[/size]
http://www.cmmacs.ernet.in/nal/pages/ipmay11.htm
(http://www.cmmacs.ernet.in/nal/pages/pasteboard_clip_image002_0016.jpg)
GSAT-12 Satellite inside the 1100 cu. m reverberation chamber of ATF
http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Jul13_2011
ЦитироватьJuly 13, 2011
Countdown commenced for PSLV-C17/GSAT-12 Mission[/size]
The Launch Authorisation Board (LAB) for PSLV-C17/GSAT-12 mission, which met on July 12, 2011 at Satish Dhawan Space Centre - SHAR, Sriharikota has cleared the launch of PSLV-C17 at 16:48 hrs (IST) on Friday, July 15, 2011.
The 53 hour countdown commenced at 11:48 hours on July 13, 2011. During the Countdown, propellant-filling operations of the liquid propellant second stage (PS2) and fourth stage (PS4) of the launch vehicle will be carried out. Mandatory checks on the launch vehicle and spacecraft including charging of batteries and pressurisation of propellant tanks will be performed. Readiness of various ground systems such as tracking radar systems and communication networks will also be checked.
PSLV-C17 will launch GSAT-12 satellite into a sub-Geosynchronous Transfer Orbit of 284 km perigee and an apogee of 21,000 km. GSAT-12 communication satellite weighing 1410 kg with 12 Ext-C Band transponders will augment the communication services in the country.[/size]
Брошюра:
http://www.isro.org/pslv-c17/pdf/pslv-c17-brochure.pdf
(http://s58.radikal.ru/i160/1107/1d/3572bd3311e7.jpg)
(http://s02.radikal.ru/i175/1107/dc/20af48bae634.jpg)
http://www.thehindu.com/news/national/article2224836.ece
ЦитироватьCHENNAI, July 14, 2011
PSLV to put GSAT-12 in orbit on Friday[/size]
T. S. Subramanian
Countdown begins at 11.48 a.m. on Wednesday
With the 53-hour countdown for the launch of the Polar Satellite Launch Vehicle (PSLV-C17) commencing at 11.48 a.m. on Wednesday, the stage is set for the rocket's lift-off from Sriharikota at 4.48 p.m. on Friday.
The PSLV-C17 will put in orbit communication satellite GSAT-12, which weighs 1,410 kg. It is a more powerful version of the standard PSLV, called PSLV-XL that will put the satellite in orbit after a 20-minute flight.
"The countdown is going on satisfactorily," said P.S. Veeraraghavan, Director of Vikram Sarabhai Space Centre (VSSC) in Thiruvananthapuram, from Sriharikota on Wednesday. The launch window is between 4.48 p.m. and 5.08 p.m. "We will use the earliest opportunity" at 4.48 p.m. for the rocket's ignition, he said. The four-stage PSLV was built by the VSSC.
This is the second time that a powerful PSLV-XL version will lift off from the second launch pad at Sriharikota. It was earlier used to put Chandrayaan-1 into orbit on October 22, 2008. While the six strap-on booster motors of the standard version of the PSLV carry a total of nine tonnes of solid propellants, the strap-on motors in the XL version are powered by a total of 12 tonnes of fuel.
"This is [also] the second time that a PSLV is being used to put a satellite in a geo-synchronous transfer orbit (GTO)," said Mr. Veeraraghavan. It was earlier used on September 12, 2002 to put Kalpana, a weather satellite, in GTO.
Raising the apogee
In fact, the PSLV-C17 will put GSAT-12 in a sub-GTO with a perigee (nearest point to the earth) of 284 km and an apogee (farthest point from the earth) of 21,000 km. After it is put in a sub-GTO, commands will be given to the liquid apogee motor (LAM) on board the satellite to boost the apogee to 36,000 km. After it is done, commands will be given to boost the perigee from 284 km to 36,000 km.
"For the first time, in our communication satellites, we are raising the apogee from 21,000 km to 36,000 km in two stages. This is a crucial manoeuvre. To raise the apogee, you have to fire the LAM when the satellite is in its perigee. So the LAM firing is a challenge," said a satellite technologist of the Indian Space Research Organisation (ISRO). The satellite will thus reach a circular geo-stationary orbit of 36,000 km.
Advanced mission computer
"A significant feature of the PSLV-C17," said Mr. Veeraraghavan, "is that it will use an advanced mission computer with indigenous processors. The ISRO built the computer. We also built our own processors. The advanced mission computer will be used for navigation, guidance and controlling" the rocket. The ISRO earlier used imported processor chips in the PSLV missions. In the PSLV-C12 mission in 2009, it used one chain of imported processors and another chain of indigenous processors. "In this mission, both the prime and the redundant chains have indigenous processors," Mr. Veeraraghavan said.
The GSAT-12, with 12 extended C-band transponders, will be used for tele-medicine, tele-education, telephone and various other communication purposes.
This is the 19th PSLV mission, out of which 17 have been successful in a row. The PSLV-C17 weighs 310 tonnes and is 44 metres tall. [/size]
http://www.isro.org/pslv-c17/Imagegallery/launchvehicle.aspx
(https://img.novosti-kosmonavtiki.ru/64270.jpg)
(https://img.novosti-kosmonavtiki.ru/64271.jpg)
(https://img.novosti-kosmonavtiki.ru/64272.jpg)
(https://img.novosti-kosmonavtiki.ru/64273.jpg)
Видео:
http://www.isro.org/images/PSLV-C17-Strap-on-Igniter%20Integration.mpg
http://www.isro.org/images/PSLV-C17-Third%20and%20Fourth%20Stage%20Integration.mpg
http://www.isro.org/images/GSAT-12-Fuelling,%20Integ,%20Heat%20Shield.mpg
http://www.thehindu.com/sci-tech/science/article2230383.ece
ЦитироватьSriharikota (AP), July 15, 2011
PSLV proves its workhorse tag yet again[/size]
Living up to its reputation as ISRO's versatile workhorse, India's Polar Satellite Launch Vehicle (PSLV) on Friday completed its 18th successful mission in a row with the launch of communication satellite GSAT-12 from here.
It was a special mission for ISRO as the agency used the most powerful 'XL' configuration for today's launch - similar to the one used for the successful Chandrayaan-I, India's moon mission in 2008.
Replicating its uninterrupted success, the PSLV has yet again demonstrated India's capabilities in the multi-billion dollar global commercial launch market.
This is for the second time that PSLV has been used for launching a communication satellite after Kalpana-1 in 2002.
Barring the lone failure of PSLV-D1, the first developmental flight, on September 20, 1993 the succeeding 18 flights have proved successful.
Since 1994, the PSLV, designed and developed by ISRO's Vikram Sarabhai Space Centre in Thiruvananthapuram, has launched a total of 45 satellites, including 25 foreign spacecrafts.
The 'XL' version used six extended solid strap on motors with each strap-on carrying 12 tonnes of solid propellant as against nine tonnes in the standard version.
With its variant configurations, PSLV has proved its multi-payload, multi-mission capability in a single launch and its geosynchronous launch capability.
(https://img.novosti-kosmonavtiki.ru/64274.jpg)
The PSLV-C17 carrying latest communication satellite GSAT-12 was successfully launched from Satish Dhawan Space Centre, Sriharikota on Friday. Photo: K. Pichumani
http://www.spacenews.com/launch/110715-india-launches-gsat12.html
http://www.nasaspaceflight.com/2011/07/india-launches-gsat-12-via-pslv/
http://www.spaceref.com/news/viewnews.html?id=1552
Видео:
http://youtu.be/Ci4hi75B59o
http://youtu.be/WmSvWrNjmDE
http://youtu.be/kTpwJikjrks
(https://img.novosti-kosmonavtiki.ru/64275.jpg)
(https://img.novosti-kosmonavtiki.ru/64276.jpg)
(https://img.novosti-kosmonavtiki.ru/64277.jpg)
http://economictimes.indiatimes.com/news/politics/nation/india-notches-another-space-success/articleshow/9238674.cms
Цитировать15 Jul, 2011, 10.15PM IST,IANS
India notches another space success[/size]
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.[/size]
http://economictimes.indiatimes.com/news/news-by-industry/et-cetera/Indian-communication-satellite-raised-to-near-its-orbit/articleshow/9269306.cms
Цитировать18 Jul, 2011, 01.31PM IST,IANS
Indian communication satellite raised to near its orbit[/size]
CHENNAI: The Indian communication satellite GSAT-12 is now very near to its ultimate geo-stationary orbit at 36,000-km apogee, or farthest point from Earth, space agency ISRO said Monday.
Indian Space Research Organisation (ISRO) has successfully raised the satellite's orbit to 35,721 km apogee and 10,074 km perigee (closet point from Earth) since its launch July 15.
"All the satellite sub-systems are functioning well. The orbit raising manoeuvres are progressing satisfactorily," S. Satish, ISRO director, publications and public relations, told IANS on phone from Bangalore.
He said a total of three orbit raising operations have been carried out since the July 15 blast-off of teh rocket carrying the GSAT-12.
The Rs.105 crore GSAT-12 satellite with 12 extended C-band transponders - automatic receivers and transmitters for communication and broadcast of signals - was launched by ISRO's lighter rocket polar satellite launch vehicle (PSLV) from the space port at Sriharikota, around 80 km from Chennai, July 15 evening.
For an observer from earth, a satellite in geosynchronous orbit will seem motionless, stationary at one point in the sky.
The GSAT-12 carries around 851 kg of fuel on-board to fire the motors. Its lift-off mass was 1,410 kg.
Soon after the launch, T.K. Alex, director of ISRO Satellite Centre, said there will be sufficient fuel left in GSAT-12 after raising its orbit to 36,000 km apogee so that it can be in operation for seven years.[/size]
http://www.thehindu.com/news/national/article2260309.ece
ЦитироватьCHENNAI, July 19, 2011
GSAT-12 reaches its home in a circular geo-synchronous orbit[/size]
T. S. Subramanian
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. [/size]
http://www.isro.org/pressrelease/scripts/pressreleasein.aspx?Jul21_2011
ЦитироватьJuly 21, 2011
GSAT-12 Communication Satellite placed in Geosynchronous Orbit[/size]
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.[/size]
http://forum.nasaspaceflight.com/index.php?topic=25379.msg783408#msg783408
Цитироватьinput~2 пишет:
Well, Stratcom has finally published to-day new data for object 37747/11034B (GSAT-12) :) (last data was dated July 16..):
GSAT-12 was observed in 35,686 x 35,717 km inclined 0.17° yesterday July 25 at 1738UTC passing 73.2°E and drifting East with a drift rate of 1.1°/day
(I would then have expected it to be at 68° on July 21 not 63° ??? )