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Ariane flight VA248

From EverybodyWiki Bios & Wiki

Ariane flight VA248
The Ariane 5 ECA launch vehicle and the AT&T T-16 and Eutelsat 7C satellites in front of a map of the Earth's continents, with lines and dots connecting major cities
Artwork featured on visitors' brochures
Ariane 5 ECA launch
Launch20 June 2019 (2019-06-20), 21:43:00 UTC
OperatorArianespace
PadKourou ELA-3
Payload
OutcomeSuccess
Ariane launches
← VA247
VA249 →

Ariane flight VA248 (French: Ariane vol VA248) was a rocket launch conducted by multinational launch service provider Arianespace.

Payload[edit]

American telecommunications company AT&T and European satellite operator Eutelsat were the customers for Ariane flight VA248.[1] The flight launched two geostationary satellites, totaling a payload mass of 10,594 kilograms (23,356 pounds).[2][3] AT&T commissioned the launch of its AT&T T-16 communications satellite – originally ordered by satellite television provider DirecTV as the next satellite in its existing fleet prior to the acquisition of the company in 2015.[1][4] The acquisition made AT&T the largest provider of subscription television in the world, with 26 million subscribers in 2015;[5][6] this has since decreased to 22.4 million subscribers in 2019.[7] Eutelsat commissioned the launch of its Eutelsat 7C communications satellite, which provides 49 Ku band transponders for Sub-Saharan African digital television stations and capacity for several hundred channels in the region.[8][9] The satellite also has optical communication capabilities for use by government services in Europe, the Middle East, and Central Asia, with a steerable beam capable of reaching areas visible to the satellite in its geostationary orbit above Africa.[10] Eutelsat 7C was manufactured by Maxar Technologies and its design, intended for a lifespan of 15 years, is based on the SSL 1300 satellite bus.[11] Weighing 3,400 kilograms (7,500 pounds), the satellite uses electric propulsion for orbit maintenance, which reduces the satellite's launch mass.[11][12] Eutelsat 7C arrived at the Guiana Space Center on 31 May.[13] AT&T T-16 and Eutelsat 7C were the 601st and 602nd satellites launched by Arianespace.[14]

Flight[edit]

External video
Successful Mission - VA248 - T-16 / EUTELSAT 7C (2:45) by Arianespace

The Ariane 5 ECA launch vehicle rolled out to Kourou's ELA-3 launch pad on 19 June 2019.[15] It lifted off at 21:43:00 Coordinated Universal Time (UTC) on 20 June 2019, approximately two minutes before sunset during a launch window that lasted an hour and 47 minutes.[16][17][18] The rocket's boosters and EPC first stage were expended in under nine minutes, while the ESC-A upper stage's HM7B engines burned for sixteen minutes;[19] the EPC first stage intentionally crashed in the Gulf of Guinea, off the west coast of Africa.[19] Following the conclusion of the burn, AT&T T-16 separated from the ESC-A at 22:11 UTC, 28 minutes after the start of the flight, followed by the Eutelsat 7C's separation six minutes later, at 22:17 UTC.[3][12] The flight lasted 34 minutes,[3] and placed the satellites into a geostationary transfer orbit from which they will eventually be placed into geostationary orbit through their own propulsion.[20] Eutelsat 7C was placed at 7° east, a position which allowed the satellite to serve its intended markets in Africa, Central Asia, Europe, and the Middle East.[8][10] Eutelsat 7C will continue in-orbit testing until the end of 2019, after which it will become fully operational.[21] Ariane flight VA248 was the 104th launch of an Ariane 5 launch vehicle, and the 71st launch of its ECA variant.[22][23] It was also the fifth launch conducted by Arianespace in 2019.[23]

See also[edit]


Other articles of the topic Spaceflight : Universe
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Footnotes[edit]

Sources

  1. Bergin, Chris (20 June 2019). "Ariane 5 launches AT&T T-16 and Eutelsat 7C". NASASpaceFlight.com. Retrieved 21 June 2019.
  2. Clark, Stephen (19 June 2019). "Ariane 5 rocket arrives at launch pad with two TV broadcast satellites". Spaceflight Now. Archived from the original on 20 June 2019. Retrieved 20 June 2019. Unknown parameter |url-status= ignored (help)
  3. Darlington, Joanna; Darvasi, Christina; Ecuer, Marie-Sophie; Enjalbert, Alexandre; Pugni, Cédric; Whyte, Jessica (31 May 2019). "EUTELSAT 7C Arrives in Kourou ahead of 20 June Launch". Business Wire. Archived from the original on 20 June 2019. Retrieved 20 June 2019. Unknown parameter |url-status= ignored (help)
  4. Rabie, Passant (20 June 2019). "Ariane 5 Rocket Lofts 2 Satellites Into Orbit in Gorgeous Sunset Launch". Space.com. Archived from the original on 21 June 2019. Retrieved 21 June 2019. Unknown parameter |url-status= ignored (help)
  5. Rhian, Jason (20 June 2019). "Under increasing pressure from SpaceX, Arianespace launches telecommunications satellites". Spaceflight Insider. Archived from the original on 21 June 2019. Retrieved 21 June 2019. Unknown parameter |url-status= ignored (help)
  6. Henry, Caleb (20 June 2019). "Ariane 5 lofts satellites for AT&T, Eutelsat". SpaceNews. Retrieved 21 June 2019.

Citations

  1. ↑ 1.0 1.1 Clark 2019, "The two payloads bolted to the top of the Ariane 5 are the T-16 satellite, a broadcasting spacecraft originally ordered by DirecTV before its acquisition by AT&T, and the Eutelsat 7C video relay station, both heading for positions in geostationary orbit more than 22,000 miles (nearly 36,000 kilometers) over the equator."
  2. ↑ Bergin 2019, "The launcher carried a total payload of approximately 10,594 kg."
  3. ↑ 3.0 3.1 3.2 Rabie 2019, "Both satellites safely arrived in geostationary transfer orbit in a relatively short amount of time. DirecTV 16 was the first to separate from the rocket's upper stage at approximately 28 minutes after liftoff, and it was followed by Eutelsat 7C six minutes later."
  4. ↑ Trefis Team (27 July 2015). "AT&T Closes DirecTV Acquisition: Reviewing The Concessions And Benefits". Forbes. Archived from the original on 20 June 2019. Retrieved 20 June 2019. AT&T closed its $49 billion acquisition of satellite television provider DirecTV on Friday, after the Federal Communications Commission ratified the deal. Unknown parameter |url-status= ignored (help)
  5. ↑ Finley, Klint (24 July 2015). "AT&T-DirecTV Merger Creates World's Largest Pay TV Company". Wired. Archived from the original on 22 April 2018. Retrieved 20 June 2019. AT&T says that the merger makes the company the largest provider of pay television services in the world with 26 million US subscribers. Unknown parameter |url-status= ignored (help)
  6. ↑ Selyukh, Alina (25 July 2015). "AT&T, DirecTV complete merger to form biggest pay-TV company". Reuters. Archived from the original on 20 June 2019. Retrieved 20 June 2019. The company said it will serve more than 26 million U.S. customers and more than 19 million in Latin America, making it the world’s biggest pay-TV company. Unknown parameter |url-status= ignored (help)
  7. ↑ Clark 2019, "But there are still plenty of customers subscribing to AT&T's pay-TV offerings. As of the end of March, AT&T's DirecTV and U-verse services had 22.4 million subscribers."
  8. ↑ 8.0 8.1 Darlington et al. 2019, "Built by Maxar Technologies, the 3.4 tonne satellite will serve markets across Africa, Europe, the Middle East and Turkey through 49 36-Mhz equivalent Ku-band transponders."
  9. ↑ Bergin 2019, "By almost doubling capacity over Sub-Saharan Africa, from 22 to 42 transponders, EUTELSAT 7C will have room for several hundred additional digital channels to support the region’s fast expanding TV market."
  10. ↑ 10.0 10.1 Bergin 2019, "It will also be equipped with a beam providing enhanced capacity for government services over Europe, the Middle East and Central Asia, as well as a steerable beam that can cover any region visible from 7° East."
  11. ↑ 11.0 11.1 Lewis, Wendy (21 March 2016). "SSL selected to provide powerful all-electric satellite to Eutelsat". SSL. Archived from the original on 21 June 2019. Retrieved 21 June 2019. EUTELSAT 7C is based on the SSL 1300 platform [...] It will exclusively use electric propulsion for orbit raising as well as station keeping and will provide service for a minimum of 15 years. All-electric satellites provide efficient solutions for satellite operators by reducing launch mass while retaining payload performance. Unknown parameter |url-status= ignored (help)
  12. ↑ 12.0 12.1 Henry 2019, "The 6,330-kilogram T-16 satellite, built by Airbus Defence and Space, separated from the rocket's upper stage 28 minutes later, followed by the 3,400-kilogram Eutelsat-7C satellite from Maxar Technologies 34 minutes after liftoff".
  13. ↑ Darlington et al. 2019, "EUTELSAT 7C, Eutelsat Communications' (Paris:ETL) newest high-power broadcast satellite, has arrived at the European Spaceport in Kourou, French Guiana..."
  14. ↑ Rhian 2019, "With the successful completion of today’s mission, Arianespace has sent 606 satellites aloft."
  15. ↑ Clark 2019, "A European-built Ariane 5 rocket rolled out to a launch pad in the South American jungle Wednesday [...] setting the stage for liftoff Thursday evening."
  16. ↑ Rhian 2019, "Controllers had about an hour and 47 minutes in the launch window but managed to get started within a couple minutes of the opening of the window."
  17. ↑ Bergin 2019, "Liftoff from the European Spaceport in Kourou, French Guiana occurred on schedule at the start of an hour and 47 minute launch window that opened at 21:43 UTC. Flight VA248 launched from Ariane Launch Complex No. 3 (ELA 3)."
  18. ↑ Henry 2019, "The heavy lift launcher took off from Europe’s spaceport in Kourou, French Guiana, at 5:43 p.m. Eastern..."
  19. ↑ 19.0 19.1 Stephen, Clark (20 June 2019). "Live coverage: Ariane 5 successful in dual-payload launch from French Guiana". Spaceflight Now. Retrieved 21 June 2019. Plus+9 minutes, 15 seconds. The main cryogenic stage's Vulcain engine has cut off and the spent stage has separated. It will fall back into the atmosphere into the Atlantic Ocean in the Gulf of Guinea off the west coast of Africa. [...] This upper stage engine is about seven minutes into a planned 16-minute burn. [...] Plus+25 minutes, 20 seconds. The rocket's second stage shut down as scheduled.
  20. ↑ Rhian 2019, "The twin payloads for this mission was the AT&T T-16 and EUTELSAT 7C satellites, which were bound for a geostationary transfer orbit (GTO)."
  21. ↑ Darlington et al. 2019, "The satellite will go into full commercial service at the end of 2019 following all electric orbit raising and in orbit tests"
  22. ↑ Rhian 2019, "Today's flight was the 104th for a member of the Ariane 5 family and the seventy-first for the ECA variant of the launch vehicle."
  23. ↑ 23.0 23.1 Clark 2019, "Thursday’s launch will be the 104th flight of an Ariane 5 rocket, and the second Ariane 5 flight this year. It will be the fifth mission of the year for Arianespace..."

External links[edit]


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