Alphasat I-XL, Insat-3D - Ariane 5ECA (VA214) - Куру ELA-3 - 25.07.2013 19:54 UTC

[Ded]

G.K. пишет:

Ded пишет:
Просто Вы отвечаете не на сообщение, а на произвольно выбранный Вами фрагмент оного.

А. вот в чём дело, простите. Уже привычка отвечать на конкретные места чужого текста. Нет, цели вас троллить не было.

Ded пишет:
Если честно, то вопрос "вертикально/горизонтально" для меня тоже интересен.
Например; "Сатурн-5" и Н-1...

Тут нужен Старый. Или Хлынин. Я так глубоко историю не знаю.

Договорились.

Скорее всего "привычка". А в целом - интересно. И знатоки истории могут помочь.

[che wi]

Так понимаю, что Alphasat I-XL (Inmarsat XL) сейчас официально называется Alphasat I-4A F4 (Inmarsat 4A F4)?

http://www.inmarsat.com/corporate/our-satellites/our-spacecraft-fleet/alphasat/index.htm

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che wi пишет:
Так понимаю, что Alphasat I-XL (Inmarsat XL) сейчас официально называется Alphasat I-4A F4 (Inmarsat 4A F4)?

 http://www.inmarsat.com/corporate/our-satellites/our-spacecraft-fleet/alphasat/index.htm

Правильно.

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http://telecom.esa.int/telecom/www/object/index.cfm?fobjectid=1138

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http://thalesgroup.com/Press_Releases/Markets/Space/2013/Successful_launch_of_Alphasat,_the_largest_geostationary_telecom_satellite_ever_built_in_Europe/

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Successful launch for Inmarsat's Alphasat satellite

25 July 2013: Inmarsat's Alphasat satellite, I-4A F4, has been successfully launched from the European Spaceport in French Guiana.

An Ariane 5 ECA rocket blasted off at 19:54 UTC on 25 July, with launch provider Arianespace confirming a successful spacecraft separation 27 minutes 45 seconds later.

The Alphasat Mission Operations Team confirmed telemetry reception and that they have command of the satellite at 20:47 UTC.

Global broadband
Alphasat is one of the most advanced telecommunications satellites ever constructed for civilian applications.

With a US$350 million investment from Inmarsat, Alphasat joins the company's award-winning Inmarsat-4 (I-4) satellite fleet, which has been powering global broadband connectivity for government and commercial customers in the L-band since 2009.

With the successful acquisition of the satellite confirmed, Inmarsat's Alphasat Mission Operations Team will complete partial solar array deployment overnight and commence orbit-raising on 26 July, to place the satellite into its final geostationary orbit position. This operation is scheduled to be completed on 31 July.

Long-term commitment
"Alphasat will strengthen our existing I-4 satellite constellation, providing coverage over Europe, the Middle East and Africa," said Rupert Pearce, Chief Executive Officer of Inmarsat.

"The launch demonstrates Inmarsat's long-term commitment to L-band services, and marks a significant milestone in the evolution of our flagship satellite fleet, bringing new capabilities both in terms of performance and resource availability."

He added: "I would like to pay tribute to the skill and expertise of Inmarsat's engineering teams and all our employees involved in the launch.

Outstanding support
"It is their dedication – alongside the outstanding support we have received from our development, manufacturing and launch partners – which has helped deliver such a successful outcome."

Designed and manufactured by Astrium, Alphasat was born out of a European Space Agency (ESA) initiative to build a new spacecraft platform capable of carrying a large state-of-the-art communications payload.

Alphasat represents Europe's largest ever private-public partnership for a space project, with ESA teaming up with Inmarsat to create new services and jobs.

Alphasat's communications payload was designed and built at Astrium's UK plants in Stevenage and Portsmouth, with important contributions from Astrium in France and Germany.

http://www.inmarsat.com/corporate/media-centre/newsroom/successful-launch-for-inmarsat%E2%80%99s-alphasat-satellite

Inmarsat Confirms Successful Launch Of Alphasat Satellite
July 29, 2013

Inmarsat, (LSE:ISAT.L), the leading provider of global mobile satellite communications services, confirms the successful launch of the Alphasat satellite.

Alphasat was launched on an Ariane 5 ECA from the Guiana Space Centre in Kourou, French Guiana at 20.54hrs BST on 25th July (16.54hrs local time). Arianespace confirmed a successful spacecraft separation at 27 minutes 45 seconds after launch and the Alphasat Mission Operations Team confirmed telemetry reception and that they have command of the satellite at 21.47 BST.

The Alphasat satellite will shortly begin a deployment phase, followed by a period of in-orbit testing. This process is expected to last several weeks before commercial operations can begin. Inmarsat expects to provide an update on the deployment progress when it reports interim results on Friday, 2nd August.

Following the start of commercial operations, Alphasat will provide service to Europe, the Middle East and Africa. Alphasat will augment the existing Inmarsat-4 satellite network, which provides global mobile satellite services in L-band.

Press release distributed by Pressat on behalf of Rocket Pop PR, on Sunday 28 July, 2013. For more information visit http://www.pressat.co.uk/

http://www.hispanicbusiness.com/2013/7/28/inmarsat_confirms_successful_launch_of_alphasat.htm

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ISRO расследует "аномалии" в работе спутника INSAT-3D

1 авг. 2013

ISRO forms committee to probe anomalous behaviour of INSAT-3D

BANGALORE: Indian Space Research Organisation has constituted a committee chaired by a retired top official to probe the "anomalies" on the country's advanced weather satellite INSAT-3D immediately after its launch on July 26.

ISRO officials faced anxious moments as the spacecraft was "untraceable" for some-time before it could be tracked by the space agency's Master Control Facility (MCF) at Hassan in Karnataka.

"A committee headed by T K Alex, a former Director of ISRO Satellite Centre, has been formed to look into the issue", an ISRO source told PTI.

It's immediately not clear if the primary system had suffered damage, and if it had implications vis-a-vis intended life of the spacecraft. Sources said the remaining critical operations were carried out using redundant system.

Meanwhile, ISRO said in a statement today that INSAT-3D, launched by European consortium Arianespace's rocket from Kourou, French Guiana, has successfully been placed in geosynchronous orbit after three orbit raising manoeuvres commanded from MCF.

"Though there was an anomalous behaviour of the satellite after the deployment of its solar panel,the Mission Operations Team of ISRO could immediately bring the Satellite into normalcy using prescribed contingency procedures and then resume the orbit-raising operations", ISRO said.

INSAT-3D is now moving towards its final geostationary orbital location of 82 degree East longitude and on August six it will reach this destination, it said.

Subsequently, the two meteorological payloads (Imaging System and Atmospheric Sounder), as well as the two transponders (designed for the Meteorological Data Relay and Satellite-aided Search and Rescue system) would be activated by August eight, the ISRO statement said.

http://economictimes.indiatimes.com/news/politics-and-nation/isro-forms-committee-to-probe-anomalous-behaviour-of-insat-3d/articleshow/21531389.cms

[che wi]

India's advanced weather satellite INSAT-3D Satellite Successfully Placed in Geosynchronous Orbit 
http://indiaeducationdiary.in/Showlatest.asp?newsid=24526

India's advanced weather satellite INSAT-3D, launched in the early hours of July 26, 2013 from Kourou, French Guyana, has successfully been placed in Geosynchronous orbit after three orbit raising manoeuvres commanded from ISRO`s Master Control Facility at Hassan.

The Orbital parameters of INSAT-3D are: 
• Apogee (farthest point to Earth) – 35,799 km 
• Perigee (nearest point to Earth) – 35,469 km 
• Inclination (of the orbit with respect to the equator)- 0.23 deg 
• Orbital period – 23 hr 48 min

Though there was an anomalous behaviour of the satellite after the deployment of its solar panel, the Mission Operations Team of ISRO could immediately bring the Satellite into normalcy using the prescribed contingency procedures and then resume the orbit-raising operations. 

INSAT-3D is now moving towards its final geostationary orbital location of 82 degree East longitude and on August 6, 2013 it will reach this destination. Subsequently, the two meteorological payloads (Imaging System, Atmospheric Sounder), as well as the two Transponders (designed for the Meteorological Data Relay and Satellite-aided Search and Rescue system) will be activated by August 8, 2013.

India Education bureau, New Delhi
August 01, 2013

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Alphasat reaches geosynchronous orbit and deploys solar arrays

02 August 2013: Inmarsat's Alphasat I-4A F4 satellite has achieved a major milestone with the successful deployment of its wing-like solar arrays.

The spacecraft has now reached geosynchronous orbit and is drawing power from the Sun.

The four-panel solar array – which spans almost 40 metres (131 feet) – will generate more than 12kW of power.

Mission team
Alphasat has been under the remote control of Inmarsat's Mission Operations Team in Toulouse, France, since the first telemetry signal was acquired at the Inmarsat ground station in Beijing – just 20 minutes after the launch by Ariane 5 from French Guiana on 25 July.

The critical task of boosting the satellite into geosynchronous orbit required firing the spacecraft's powerful liquid apogee engine four times – with each burn using the equivalent of 60 tanks of car fuel.

The final operational deployment will see the blooming of Alphasat's 11-metre (36-ft) reflector on 3 August.

Global broadband
Alphasat joins Inmarsat's award-winning I-4 satellite fleet, which has been powering global broadband connectivity for government and commercial customers in the L-band since 2009.

The new satellite will provide additional mobile satellite communications capacity over Europe, the Middle East and Africa.

http://www.inmarsat.com/corporate/media-centre/newsroom/alphasat-reaches-geosynchronous-orbit-and-deploys-solar-arrays

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http://www.esa.int/Our_Activities/Telecommunications_Integrated_Applications/Alphasat/Alphasat_deploys_its_giant_reflector_in_orbit

5 August 2013

Alphasat, Europe's largest-ever telecom satellite, reached a temporary position in the geostationary ring last weekend, where it deployed its 11 m-diameter main antenna over the course of a day – marking ten days in orbit and completing one of the final steps towards starting services.

It will stay in this slot for several weeks while Inmarsat together with ESA continue testing the telecom payload, the backup units on the Alphabus platform and ESA's four hosted payloads.

Several major milestones have been met over the past few days, including rising to geostationary altitude after separation from its Ariane 5 launcher, and deploying its twin four-panel solar wings, spanning 40 m.

The panels rotate automatically, following the Sun, while Alphasat's sophisticated attitude control system tracks its position above Earth.

All of these milestones were assured by a team from Astrium, the Alphasat prime contractor, managed by Inmarsat. In a cooperative effort unprecedented in Europe, the team was supported by ESA and France's CNES space agency, as well as Thales Alenia Space for Alphabus platform operations.

Alphasat uses the first flight model of the new platform. The Alphabus line, developed by Astrium and Thales Alenia Space, under a joint contract to ESA and CNES, is Europe's response to market demand for increased broadcasting services.

It accommodates missions with up to 22 kW of payload power and mass up to two tonnes. As a high-power multipurpose platform, it gives European industry an unprecedented and unique position in the global telecom market.

Jena-Optonik's Astro APS startracker was the first hosted payload to be switched on, measuring the satellite's attitude.

Alphasat joins Inmarsat's award-winning I-4 satellite fleet, which has been powering global broadband connectivity for government and commercial customers in the L-band since 2009.

The new satellite with its new-generation advanced payload will provide additional mobile satellite communications capacity over Europe, the Middle East and Africa.

[Mark]

На спутнике Alphasat I-XL ест тоже 4 технологичные ПН которые должны быть проверены в первый раз в особых условиях пространства на геостационарной орбите. Из четырех полезных нагрузок, летает для демонстрационных целей два от Германии: звездный датчик компании Йена Optronik. Он обеспечивает высокоточный  информации о местоположении и также поддерживает точное выравнивание терминал связи оптического излучения (LCT). Он был сделаны черес компаниу  Tesat в рамках подготовки к системе передачи данных европейских реле EDRS. Скорость этого система до 1.8 Гбит/с, эквивалентно 130 DVD в час на большое расстояние до 45 000 километров.

Уже от нескольких лет лазерные системы передачи тестируются в космосе. Спутник наблюдения Земли Германии TerraSAR-X в первый раз в 2007 году, удалось обмена данными с американском спутнике NFIRE на расстоянии 5000 километров со скоростью передачи данных на 5,6 Гбит на секунду.


http://www.dlr.de/dlr/desktopdefault.aspx/tabid-10212/332_read-7645/year-all/#gallery/11698

[Salo]

http://www.4-traders.com/SAFRAN-4696/news/SAFRAN--Four-Snecma-plasma-thrusters-now-in-operation-on-Alphasat-satellite-17184468/

SAFRAN : Four Snecma plasma thrusters now in operation on Alphasat satellite
08/12/2013 | 09:52am US/Eastern

12.08.2013
Four Snecma plasma thrusters now in operation on Alphasat satellite

PRESS RELEASE

Courcouronnes, France - August 12th, 2013. Snecma (Safran) announced today that its four PPS®1350-G plasma thrusters on the Alphasat satellite, launched on July 25 by an Ariane 5 rocket for Inmarsat, were commissioned. The commissioning took place in successive stages, from August 9th to August 10th, as planned.

Alphasat is the first satellite built by Astrium using the new Alphabus platform developed jointly by Astrium and Thales Alenia Space with the support of the European Space Agency (ESA) and the French space agency CNES (Centre National d'Etudes Spatiales). The satellite's four PPS®1350-G plasma thrusters, each rated at 1.5kW and developing 9 grams of thrust, will be used for North-South Station Keeping in the satellite's geostationary orbit, throughout its design life of 15 years.

"The successful commissioning of this system and our considerable in-orbit experience with other plasma thrusters provided by Snecma clearly validated our strategy in this sector," said David Quancard, head of Snecma's Space Engines division. "Using this technology instead of conventional chemical propulsion saves weight, extends satellite life and offers more operational flexibility. There is now huge demand from satellite prime contractors for plasma propulsion systems."

Snecma has developed electric thrusters for satellites for more than 30 years. Since 1991, the company has focused on the development of plasma propulsion systems. The first PPS®1350 thruster propelled ESA's Smart-1 lunar probe from Earth orbit to Moon orbit in a successful mission lasting from 2003 to 2006, logging some 5,000 hours of operation. Snecma has already delivered Thruster Module Assemblies (TMA) for seven Astrium satellites using the Eurostar 3000 platform, and in 2012 it delivered the Electric Propulsion Thruster Assembly (EPTA) for the first Small Geo platform, intended for the Hispasat AG1 satellite.

Snecma is now developing a family of thrusters and propulsion systems offering 3 to 100 grams of thrust to meet evolving market requirements. Demonstration tests since 2006 have generated conclusive results, enabling Snecma to offer electric propulsion solutions for satellite orbit transfer. ESA and CNES have already chosen four PPS®1350-E (2.5kW) and four PPS®1350-S (1.5kW) thrusters for the new Alphabus Improvement platform, to be used, respectively, for orbit transfer and Station Keeping.