Inmarsat-S–Europasat/Hellas-Sat 3 (HS3-IS), GSAT-17– Ariane 5 ECA (VA238)– Kourou ELA-3 – 28.06.2017

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Заключительное слово
 

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Stéphane Israël‏ @arianespaceceo 4 мин. назад

See you again at the Spaceport on August 1 for the second #Vega flight of the year #VV10

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http://www.arianespace.com/mission-update/liftoff-of-arianespaces-ariane-5-with-hellas-sat-3-inmarsat-s-ean-and-gsat-17/

Ariane 5 | June 28, 2017

Liftoff of Arianespace's Ariane 5 with Hellas Sat 3-Inmarsat S EAN and GSAT-17

The Arianespace mission with Hellas Sat 3-Inmarsat S EAN and GSAT-17 is now underway following Ariane 5's liftoff from the Spaceport in French Guiana.

Total lift performance for today's launch is estimated at 10,177 kg., with the two satellites to be deployed during a flight lasting 39 minutes.

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http://www.arianespace.com/mission-update/arianespaces-ariane-5-launches-two-multi-mission-satellites-for-fixed-and-mobile-services/

Ariane 5 | June 28, 2017

Arianespace's Ariane 5 launches two multi-mission satellites for fixed and mobile services



The 80th consecutive success for Arianespace's heavy-lift Ariane 5 lofted two satellites tonight, delivering new capacity for use in the distribution of TV and video content, telecommunications services, mobile satellite services, data relay, along with coverage of search and rescue missions.

Orbited by Arianespace Flight VA238 from the Spaceport in French Guiana were a so-called "condosat" composed of two payloads for Hellas Sat and Inmarsat, along with a spacecraft for the Indian Space Research Organisation.

On its fourth mission at the service of Arianespace this year, the Ariane 5 had a payload lift performance estimated at 10,177 kg. to geostationary transfer orbit, maintaining the company's sustained launch pace in 2017.

Спойлер

Hellas Sat 3-Inmarsat S EAN deployed first in the mission

Riding as the upper passenger on Flight VA238 was Hellas Sat 3-Inmarsat S EAN, which integrated two relay payloads.

The payload for Hellas Sat 3 will expand this company's business reach by providing direct-to-home (DTH) TV broadcast and telecommunications services, as well as the distribution of high-definition (HD) and ultra-high definition (UHD) video content in Europe, the Middle East and sub-Saharan Africa. These fixed satellite services (FSS) and broadcast satellite services (BSS) include a cross-strap service between Europe and South Africa.

Christodoulos Protopapas, the CEO of Hellas Sat, congratulated Arianespace on successfully orbiting the Hellas Sat 3-Inmarsat S EAN spacecraft, and said he was looking forward to the launch of his company's next satellite – Hellas Sat 4 – scheduled on an Arianespace mission in 2018.

Keeping airline passengers connected while aloft

Also integrated on the Hellas Sat 3-Inmarsat S EAN satellite is a relay payload for a system developed by Inmarsat with Deutsche Telekom to offer high-speed, high-capacity Wi-Fi connections for airline passengers anywhere in the world.

Inmarsat is specialized in mobile satellite communications, and the first customer for this airborne connectivity is the International Airlines Group (AIG), which has begun equipping its aircraft and aims to have 90 percent of its short-haul fleet complete by early 2019.

Inmarsat Chief Technology Officer Michele Franci thanked Arianespace as part of the European effort that will bring cabin connectivity to passengers across Europe. "This satellite was riding on one of Europe's best success – Ariane," he added.

Hellas Sat 3-Inmarsat S EAN, built by Thales Alenia Space

Weighing an estimated 5,780 kg. at liftoff, Hellas Sat 3-Inmarsat S EAN was produced by Thales Alenia Space using its Spacebus 4000C4 platform. With the satellite's successful launch tonight, Arianespace has now orbited a total of 149 spacecraft built by the company – continuing a long-time partnership.

Bertrand Maureau, Executive Vice President – Telecommunications at Thales Alenia Space, acknowledged Ariane 5's mission performance this evening, and noted that Hellas Sat 3-Inmarsat S EAN was the fourth satellite from his company launched so far this year by Arianespace.

Hellas Sat 3-Inmarsat S EAN also marks key milestones between Arianespace and the two operators: it is the ninth satellite launched at the service of Inmarsat, and the first orbited for Hellas Sat.

The dual-payload condosat has a total coverage area that includes spans Europe, the Middle East and sub-Saharan African regions, and will operate from a 39-deg. East orbital slot.

21 satellites launched for ISRO

GSAT-17 was the 21st spacecraft orbited by Arianespace for the Indian Space Research Organisation, extending a relationship that dates back to 1981 with launch of the APPLE experimental satellite.

Built by ISRO/ISAC (the ISRO Satellite Centre) utilizing the Standard I-3K satellite bus, GSAT-17 – with a mass at liftoff of 3,476 kg. – will expand the Indian national space agency's current fleet of 17 telecommunications satellites. It is to provide continuity of Fixed Satellite Services (FSS) in Normal C and Upper Extended C bands, as well as Mobile Satellite Services (MSS) in S-band and Data Relay and Search & Rescue services in UHF band – operating from a final orbital position of 93.5 deg. East.

Dr. K. Sivan, Director of ISRO's Vikram Sarabhai Space Center, described Ariane 5's launch this evening as "glorious," adding the Indian space organization's "congratulations, complements and thanks to Arianespace for a wonderful job."

Next up for Arianespace: Vega Flight VV10

Arianespace's next mission is set for August 1, utilizing the lightweight vehicle Vega on a mission to Sun-synchronous orbit. Its two passengers will be OPTsat-3000 for the Italian Ministry of Defense, along with VenµS for the French and Israeli space agencies.

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http://www.arianespace.com/press-release/flight-va238-80th-consecutive-success-for-ariane-5-and-a-successful-mission-for-hellas-sat-inmarsat-and-isro/

Ariane 5 | June 28, 2017

Flight VA238: 80th consecutive success for Ariane 5, and a successful mission for Hellas Sat, Inmarsat and ISRO



Arianespace has successfully launched the Hellas Sat 3-Inmarsat S EAN "condosat" – composed of two payloads for operators Hellas Sat and Inmarsat; as well as the GSAT-17 satellite for India's space agency, ISRO (Indian Space Research Organization).

The launch took place on Wednesday, June 28 at 6:15 p.m. (local time), from the Guiana Space Center (CSG), Europe's Spaceport in French Guiana (South America).

Спойлер

With this seventh launch of the year, and the fourth by Ariane 5 in 2017, Arianespace marks the 80th successful launch in a row by this heavy launcher.

Arianespace at the service of in-flight connectivity for Hellas Sat and Inmarsat

Hellas Sat, a major satellite operator and subsidiary of Arabsat Group, provides communications services in Europe, the Middle East and South Africa.

The Hellas Sat 3 payload, the second for the operator Hellas Sat and the first to be orbited by Arianespace, will expand the company's business reach by providing direct-to-home (DTH) TV broadcast and telecommunications services, as well as the distribution of high-definition (HD) and ultra-high definition (UHD) video content in Europe, the Middle East and sub-Saharan Africa.

These fixed satellite services (FSS) and broadcast satellite services (BSS) will include a cross-strap service between Europe and South Africa.

Arianespace has another Hellas Sat satellite – Hellas Sat 4 – in its order book. This spacecraft will further increase the operator's service availability.

Inmarsat S EAN is the ninth payload orbited by Arianespace for Inmarsat – a company specialized in global mobile satellite communications – since the launch of MARECS A in 1981.

The Inmarsat S EAN (European Aviation Network) payload comprises the space segment of a new hybrid system, integrating satellite-based services with a complementary ground network developed by Inmarsat's strategic partner Deutsche Telekom.

The EAN network, which will commence commercial services in the second half of 2017, will deliver a truly seamless inflight WiFi service for Europe's airlines and their passengers.

The International Airlines Group (IAG), is confirmed as the launch customer for the new service.  IAG has begun equipping its aircraft and aims to have 90% of its short haul fleet complete by early 2019.

Arianespace, a partner of reference for ISRO since 1981

Following the launch of GSAT-18 on October 5, 2016, GSAT-17 is the 21st satellite orbited by Arianespace for the Indian space agency ISRO (Indian Space Research Organization). Arianespace has won nearly 90% of all Indian geostationary satellite launch contracts open to competitive bidding.

GSAT-17 will join ISRO's fleet of 17 operational telecommunications satellites. It will provide both fixed (FSS) and mobile (MSS) satellite services, and also handle data transmission and search & rescue (SAR) services.

It carries on ISRO's mission of using space to support the development of the Indian sub-continent by launching satellites of all types (Earth observation, telecommunications, educational program broadcasting, science, navigation, etc.).

Arianespace's order book includes another ISRO satellite to be launched: GSAT-11.

80th success in a row for Ariane 5

Today's Flight VA238 mission was the 80th successful Ariane 5 launch in a row, a string of successes that started in 2003. Over the last 14 years, the Ariane 5 launcher has orbited 160 satellites for both commercial and government customers, exceeding 677 metric tons.

This enviable track record reflects the exceptional reliability and availability of Arianespace's heavy-lift launcher, and confirms its status as the most reliable launcher on the commercial market today.

Including this mission, Arianespace has now carried out seven launches over a period of five months and a day in 2017, sending 10 satellites into geostationary transfer orbit (GTO) and one into a non-GTO orbit, with a cumulated payload weight of nearly 45 metric tons. Arianespace plans five more launches in 2017: three by Ariane 5 and two by the Vega light launcher.

Shortly after the announcement of the orbital injection of the two satellites, Stéphane Israël, CEO of Arianespace, said: "Arianespace is proud to serve our European and Indian customers with this fourth successful Ariane 5 launch of the year. We are very honored to have earned the trust of Hellas Sat in launching the second satellite in its operational fleet; and Inmarsat, for whom this launch marks the ninth by Arianespace since 1981; and of course ISRO, the Indian space agency, for which we performed our 21st launch today. I also would like to thank our long-standing partner Thales Alenia Space, which built the Hellas Sat 3-Inmarsat S EAN "condosat."

"Today's launch was the 80th success in a row for Ariane 5 over a period of 14 years – an exceptional performance that anchors its position as the most reliable commercial launcher in the marketplace. I also would like to thank all our partners in this successful team effort: ArianeGroup and the entire European launcher industry for the exceptional reliability and availability of our heavy-lift launcher; ESA, for its critical support of the Ariane program; CNES/CSG, along with our ground segment companies and all staff at the space center. Finally, I would like to congratulate the teams at Arianespace, who are celebrating this evening our successful seventh launch of the year, and the 290th launch by the Arianespace launcher family."

The Hellas Sat 3-Inmarsat S EAN satellite was built by Thales Alenia Space in Cannes, southern France, using a Spacebus 4000 C4 platform. The Hellas-Sat 3 payload will provide secure DTH TV broadcast and telecommunications services using 47 (BOL)/44(MOL) transponders in Ku band and one Ka-band transponder. The Inmarsat S EAN payload, operating in S-band for Inmarsat S EAN, will provide communications services for in-flight connectivity via the European Aviation Network (EAN), which combines space and ground segments to provide robust and reliable high-speed services to European passengers. Positioned at 39° East, its coverage zone spans Europe, the Middle East and sub-Saharan African regions. The satellite had a liftoff mass of 5,780 kg., and it offers a design life exceeding 15 years.

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The GSAT-17 satellite was built by ISRO/ISAC (ISRO Satellite Center) using a Standard I-3K platform. Its payload comprises C-band, Extended C-band and S-band transponders, as well as data relay and search & rescue (SAR) services in UHF band. Positioned at 93.5° East, GSAT-17 will provide fixed and mobile communications services, data transmission and search & rescue (SAR) services for India, the Middle East and regions of Southeast Asia. The satellite had a liftoff mass of 3,476 kg., and offers a design life of approximately 15 years.

About Arianespace

Arianespace uses space to make life better on Earth by providing launch services for all types of satellites into all orbits. It has orbited more than 550 satellites since 1980, using its family of three launchers, Ariane, Soyuz and Vega, from launch sites in French Guiana (South America) and Baikonur, Kazakhstan. Arianespace is headquartered in Evry, near Paris, and has a technical facility at the Guiana Space Center, Europe's Spaceport in French Guiana, plus local offices in Washington, D.C., Tokyo and Singapore. Arianespace is a subsidiary of ArianeGroup, which holds 74% of its share capital, with the balance held by 17 other shareholders from the European launcher industry.

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Spaceflight Now‏ @SpaceflightNow 28 мин. назад

Ground stations have established contact with Hellas-Sat 3/Inmarsat S EAN & GSAT 17 satellites launched by Ariane 5. https://spaceflightnow.com/2017/06/28/va-238-mission-status-center/ ...

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Arianespace Flight VA238 / Hellas Sat 3-Inmarsat S EAN and GSAT-17

arianespace

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http://www.isro.gov.in/update/29-jun-2017/gsat-17-successfully-launched-ariane-5-va-238-kourou-french-guiana

Jun 29, 2017

GSAT-17 successfully launched by Ariane-5 VA-238 from Kourou, French Guiana

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Inmarsat S EAN Satellite Launch

Inmarsat

(1:54:49)

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LIVE: Ariane 5 Launch with HellasSat 3 & GSAT-17 (VA-238 )

Space Videos

(1:57:28 )

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Запись пресс-конференции (без вступительного слова)

VA238 - 06/28/2017

arianespace

(16:05)

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Vol Ariane 238 – Mission réussie !
Le 28 juin, Ariane 5 a parfaitement réussi sa mission en mettant en orbite les deux satellites HS3/IS et GSAT-17.

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http://spaceflight101.com/ariane-5-va238/ariane-5-va238-launch-success/

Ariane 5 successfully lifts two Telecommunications Satellites for three Operators
June 28, 2017

Hauling two heavy satellites into orbit, Europe's Ariane 5 rocket checked off its fourth successful flight of the year on Wednesday, the 80th success in a row for the workhorse launcher in a streak that has been going since 2002. Hidden under the rocket's large fairing were the shared Inmarsat-S/HellasSat-3 satellite for TV distribution and aeronautical connectivity and India's GSAT-17 that will reinforce the country's communications infrastructure.

Making its third launch in eight weeks, the 55-meter tall Ariane 5 blasted off fr om the ELA-3 launch site at the Guiana Space Center at 21:15 UTC – rumbling off powered by its cryogenic core stage and twin boosters that did most of the work over the first two minutes of the rocket's trip across the Atlantic Ocean, heading straight east to reach a nearly ideal Geostationary Transfer Orbit with an inclination of three degrees. After the boosters dropped away 64 Kilometers in altitude, Ariane 5 relied on its core stage for another six and a half minutes before handing over to the ESC-A upper stage tasked with the final push into orbit via a 16-minute burn.

Спойлер

Photo: Arianespace Webcast

Having reached an injection speed of 9.3 Kilometers per second, Ariane 5 traded the power of its main engine for the precision of its orientation thrusters to send its two passengers on the way. First up was the Inmarsat-S/HellasSat-3 satellite that made its way into orbit atop the Sylda adapter that enables Ariane 5 to boost two sizeable spacecraft into orbit. Once the Sylda was dropped off, the way was clear for GSAT-17, the 21st Indian satellite lifted by Arianespace. The two were the 600th and 601st satellites launched by the French-based launch services provider.


Photo: Inmarsat

Inmarsat-S/HellasSat-3 is a shared satellite by London-based mobile communications provider Inmarsat and Greek operator HellasSat, born out of Inmarsat's EuropaSat Project that stalled in 2009 and was revived five years later with plans for the condominium satellite. Per the agreement, the two project participants are splitting the cost for the satellite platform and its launch while each pays for their respective payload.

Based on Thales Alenia's Spacebus-4000C4 satellite platform, the craft stands 5.2 meters tall and weighs in at 5,780 Kilograms, featuring four large deployable antenna reflectors plus two parabolic antennas on the craft's Earth-facing deck.

The Inmarsat payload hosts a powerful S-Band terminal broadcasting in the 2GHz frequency band cleared for use through the European S-Band Application Process.

>>Inmarsat-S / HellasSat-3 Satellite Overview


Image: Arianespace / Thales Alenia

Three large S-Band beams cover the entire European Union plus Norway and Switzerland, delivering in-flight connectivity to airline passengers as part of Inmarsat's European Aviation Network that comprises Inmarsat-S as central space segment, a network of around 300 4G ground sites and airborne terminals on aircraft that automatically switch between capacity from ground stations and the satellite – creating a system that should provide users with high-quality, robust Internet services during their time aloft.

The approach of a combined SATCOM and terrestrial system was chosen to meet high demand over heavily-trafficked air routes near Europe's major cities and aeronautical hubs. In essence, the satellite is in charge of covering wide areas for cruising planes while the ground-based system delivers high capacity to localized areas of increased demand.


Photo: Inmarsat

The Hellas Sat segment of the satellite carries 47 Ku-Band and one Ka-Band transponders. The Ku-Band payload is primarily geared towards TV distribution with coverage over Europe to serve the company's current user base that is presently served by a capacity from the 14-year old HellasSat-2 with 44 Ku-Band and one Ka-Band transponder. Two additional coverage zones over the Middle East and Southern Africa will allow the ArabSat subsidiary to tap into new markets with HD and Ultra-HD services.

The multi-beam Ka-band payload is commissioned to provide capacity for broadband and business networks.

Destined for an orbital location of 39 degrees East, the condo satellite was initially planned to launch atop a SpaceX Falcon Heavy rocket in 2016, but persistent delays to the heavy-lifter's debut mission prompted a switch to Ariane 5. Inmarsat lauded Arianespace's ability to provide an extremely fast turnaround of seven months between the satellite's addition to Ariane's manifest and launch.


Photo: Arianespace/ESA/CNES/optique Video du CSG

India's GSAT-17 weighed in at 3,477 Kilograms and continued a long-standing partnership between the Indian Space Research Organization and Arianespace upon which ISRO relied for the majority of satellites that could not be launched from India. With recent successes by India's GSLV rocket family, ISRO hopes to launch more and more satellites from Indian soil and eventually end its reliance on outside launch services providers altogether.

Designed for a 15-year service life, GSAT-17 is tipping the scales as India's heaviest satellite to date, employing the I-3K satellite bus that is fitted with 38 C-Band transponders and two pairs of S/C and C/S up-down transponders for mobile connectivity. The satellite will ensure a continuation of operational services while also providing extension coverage to satisfy an ever growing demand for telecommunications services. Augmentation is provided for existing telecommunication, television and VSAT services. Also installed on the satellite is one dedicated transponder for Data Relay (DRT) and Search and Rescue (SAR) services.

>>GSAT-17 Satellite Overview

The launch of GSAT-17 capped a very busy month for ISRO that saw the successful first all-up launch of its GSLV Mk. III heavy-lift rocket with GSAT-19 and the launch of 31 satellites atop a Polar Satellite Launch Vehicle last week.


Photo: Arianespace/ESA/CNES/Optique Video du CSG

The Ariane 5 VA238 launch campaign was characterized as very smooth following arrival of the launch vehicle components in mid-May and the two satellites by the end of last month. Operations continued running smoothly when the integrated Ariane 5 was moved to the ELA-3 launch complex on Tuesday for final preparations for an 11-hour and 43-minute countdown that picked up at 9:36 UTC on Wednesday.

After power-up at L-10 hours, Ariane 5 went through detailed checkouts that provided a clean bill of health to the vehicle in order for the propellant loading process to be started. Tanking picked up on the first stage around 4 hours and 38 minutes prior to launch and 50 minutes later on the second stage to load Ariane 5 with 184 metric tons of supercold Liquid Oxygen and Liquid Hydrogen Propellant. Standing fully fueled, Ariane 5 underwent final preparatory steps for its fast-paced automatic countdown sequence while the two passengers made their transition to battery power for the ride into orbit.


Photo: Arianespace Webcast

Ariane 5 entered the T-7-minute Synchronized Sequence after a brief delay due to ground systems readiness with computers taking over control to move the vehicle through a long list of steps to transition Ariane 5 to an autonomous launch configuration. The launcher finished topping up its tanks and entered pressurization, switched to internal power, and configured its Flight Control System for blastoff with handoff to the vehicle just seconds before liftoff.

The trusted Vulcain 2 engine came to life when clocks reached zero, soaring to a launch thrust of nearly 100 metric ton force under close supervision by computers that ensured the engine was up and running before committing to flight via the ignition of the boosters at 21:15:07 UTC.

Jumping off from its launch pad on the edge of the Amazon jungle, Ariane 5 had a thrust equivalent to ten Airbus A380s running at full power. Riding on pillars of fire and smoke, Ariane 5 pitched and rolled onto a due easterly departure path for a quick flight across the Atlantic Ocean, heading towards the sunset.


Photo: Arianespace Webcast

The twin EAP boosters did most of the work in the initial flight phase, contributing the majority to Ariane's total launch thrust of around 1,420 metric-ton-force – helping accelerate the launcher beyond the speed of sound just 49 seconds into the flight. Ariane 5 encountered Maximum Dynamic Pressure shortly after T+1-minute when passing 13 Kilometers in altitude.

The two boosters, each consuming some 237 metric tons of propellant, finished their job at T+2 minutes and 19 seconds, helping accelerate Ariane 5 to over 2 Kilometers per second. Burnout of the boosters was sensed by their declining chamber pressure, triggering pyrotechnics to separate the boosters and separation motors to push them away from the still-firing core stage 65 Kilometers in altitude.


Photo: Arianespace Webcast

Now only relying on its Vulcain engine, Ariane 5 continued towards orbit with a vacuum thrust of 136,600 Kilogram-force, tasked with accelerating the vehicle by another five Kilometers per second before handing over to the upper stage. Passing 112 Kilometers in altitude at T+3 minutes and 16 seconds, Ariane 5 split open its Swiss-built payload fairing and separated the 17-meter long halves as aerodynamic forces were no longer a danger to the payloads. Separation of the fairing revealed the Inmarsat/Hellas Sat spacecraft while GSAT-17 remained hidden under the Sylda adapter for the duration of powered flight.

The first stage exhausted its supply of cryogenics eight minutes and 52 seconds into the flight when it shut down its Vulcain 2 engine, having reached a sub-orbital speed of 6.95 Kilometers per second. Four seconds later – passing through 180 Kilometers in altitude – the 30.5-meter core stage dropped away and cleared the ESC-A upper stage to take over powered flight duties.


Photo: Arianespace Webcast

The 6,400-Kilogram-force HM-7B engine of the second stage fired up just past T+9 minutes on a burn of 16 minutes and two seconds to provide another 2.4 Kilometers per second of delta-v to achieve the planned GTO injection speed of 9.33km/s. Initially focusing on building speed, Ariane 5 passed its minimum altitude of 156 Kilometers 15 minutes into the flight, from then on headed uphill to drop the satellites off in a highly elliptical orbit.

Ariane 5 aimed for an optimized Geostationary Transfer Orbit of 250 by 35,786 Kilometers at an inclination of only 3 degrees – taking advantage of French Guiana's low latitude plus surplus performance on the Ariane 5 to shave another few degrees off the inclination.

Ariane 5 was carrying a total payload mass of 10,177 Kilograms on Wednesday, successfully accomplishing its planned orbital injection 25 minutes after lifting off when the vehicle had already reached Africa's west coast.


Inmarsat-S/HellasSat-3 Separation – Image: Arianespace Webcast


GSAT Separation over India – Image: Arianespace Webcast

After a smooth climb, Ariane 5 traded the power of its main engine to the precision of its attitude control thrusters for the ballistic phase designed to carefully deploy the satellites on safe orbital paths.

Springs pushed the heavy Inmarsat-S/HellasSat-3 on its way 28 minutes after launch, embarking on ten days of orbit raising and several weeks of commissioning, handled by Thales Alenia Space before the two operators can begin offering services through the spacecraft. ESC-A moved into a different attitude for the jettisoning of the Sylda Adapter at T+30 minutes to reveal the GSAT-17 satellite for its separation, coming after another nine minutes of coasting. GSAT-17 will complete several firings of its Liquid Apogee motor to take up station at 93.5° East from wh ere it can cover the Indian subcontinent.

For Ariane 5, the mission ended with the usual twenty-minute passivation sequence that included spinning the stage up, venting down all tanks and powering off onboard systems.

Wednesday's launch marked the 238th flight of an Ariane rocket in a program dating back to 1979, it was the 94th for an Ariane 5 and the 63rd in the ECA configuration. For Arianespace, the next mission is coming up on August 2 when a Vega rocket will lift a French-Israeli environmental monitoring satellite and a high-resolution imaging satellite for the Italian Defence Ministry. Ariane 5 will next see action in late August when lifting the Intelsat 37e and BSat-4 communications satellites.

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Официальное видео от Arianespace

Arianespace Flight VA238 / Hellas Sat 3-Inmarsat S EAN and GSAT-17

arianespace

(1:23:04)

 
 

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http://www.isro.gov.in/update/29-jun-2017/indias-gsat-17-communication-satellite-launched-successfully

Jun 29, 2017

India's GSAT-17 Communication Satellite Launched Successfully

Today (June 29, 2017), GSAT-17 became India's third communication satellite to successfully reach orbit in the past two months.  GSAT-17 was launched in the early morning hours using the European Ariane 5 Launch Vehicle from Kourou, French Guiana. The 3477 kg GSAT-17 carries communication payloads in C-band, Extended C-band and S-band for providing various services to the country.  The satellite also carries equipment for meteorological data relay and satellite based search and rescue services.

After its lift-off at 0245 hrs (2:45 am) IST and a flight lasting about 39 minutes, GSAT-17 separated from the Ariane 5 upper stage in an elliptical Geosynchronous Transfer Orbit (GTO) with a perigee (nearest point to Earth) of 249 km and an apogee (farthest point to Earth) of 35,920 km, inclined at an angle of 3 degrees to the equator.

ISRO's Master Control Facility (MCF) at Hassan in Karnataka took over the command and control of GSAT-17 immediately after its separation from the launch vehicle. Preliminary health checks of the satellite revealed its normal functioning.

Спойлер

In the coming days, orbit raising manoeuvres will be performed to place GSAT-17 satellite in the Geostationary Orbit (36,000 km above the equator) by using the satellite's propulsion system in steps.

During the final stages of its orbit raising operations, the two solar arrays and both the antenna reflectors of GSAT-17 will be deployed.  Following this, the satellite will be put in its final orbital configuration.  GSAT-17 will be positioned at its designated orbital slot in the geostationary orbit and will be co-located with some of the Indian operational geostationary satellites. Later, it is planned to turn on the communication payloads of the satellite. After the successful completion of all the in-orbit tests, GSAT-17 will be ready for operational use.

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