Superbird-8, GSAT-18 - Ariane 5 ECA (VA231) - Куру ELA-3 - 05.04.2018 21:34 UTC

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NOTMAR #40

Зоны D, A и B



Зоны D, A, B и C

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HYLAS 4 Presentation

arianespace

Опубликовано: 3 апр. 2018 г.

HYLAS 4 is Avanti's third satellite launch, and marks its third with Arianespace from the Spaceport in French Guiana.

HYLAS 4 will deliver high speed, reliable and secure satellite communications to Internet Service Providers (ISPs), Mobile Network Operators (MNOs), governments and satellite operators across Europe, through its Ka-band capacity. The high throughput satellite will also provide services in regions such as West and Central Africa, and with its steerable beams that provide services in Europe, South America, the Caribbean, and the Middle East.

It is the 28th Orbital ATK-built satellite to be launched by Arianespace, a series that started with the TOPEX-Poseidon mission in 1992.

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DSN-1/Superbird-8 Presentation

arianespace

Опубликовано: 3 апр. 2018 г.

DSN-1/Superbird-8 is the 19th SKY Perfect JSAT satellite assigned to Arianespace for launch. The most recent Arianespace launch for this operator was with JCSAT-15 in December 2016.

On this dual-use satellite, the Superbird-8 payload is composed of high-performance Ku and Ka transponders and will provide satellite communications services mainly in the Japanese market. Located at 162 degrees East Longitude, it will replace the Superbird-B2 satellite launched in 2000 by Arianespace.

The DSN-1 (X-Band Defense Communications Satellite-1) payload is associated with the Program to Upgrade and Operate X-Band Satellite Communications Function, for which the DSN Corporation – a subsidiary of SKY Perfect JSAT – has concluded a program contract with Japan's Ministry of Defense.

DSN-1/Superbird-8 was built by MELCO (Mitsubishi Electric Corporation), with manufacturing management by NEC Corporation, using a DS2000 platform.

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AvantiCommunications‏ @Avanti_plc 4 ч.4 часа назад


We're growing communications across Africa; Watch our new HYLAS 4 video to find out more

Avanti Communications HYLAS 4 Ka-Band Satellite

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http://www.arianespace.com/mission-update/va242-launch-readiness-review/

Ariane 5 | April 3, 2018

Approval is given for Arianespace's Ariane 5 launch with DSN-1/Superbird-8 and HYLAS 4

Arianespace's next Ariane 5 flight has been authorized for liftoff on April 5 following today's launch readiness review, which was conducted at the Spaceport in French Guiana.



This milestone confirmed that the heavy-lift launcher and its dual-satellite payload – comprised of DSN-1/Superbird-8 for SKY Perfect JSAT Corporation and Avanti Communications' HYLAS 4 – are flight-ready, along with the Spaceport's infrastructure and the network of downrange tracking stations.

With approval granted, Ariane 5 is cleared for tomorrow's rollout from the Final Assembly Building to the ELA-3 launch zone. Liftoff will occur the following day during a 50-minute launch window that opens at 6:34 p.m. local time in French Guiana.

Ariane 5 will deliver a total payload lift performance of approximately 10,260 kg. on the mission to geostationary transfer orbit (GTO), which is designated Flight VA242. This total includes the two satellite passengers, plus the workhorse vehicle's dual-payload deployment system and integration hardware.

Launch window for Flight VA242:

[TH]French Guiana[/TH][TH]Universal Time (UTC)[/TH][TH]Tokyo, Japan[/TH][TH]Paris, France[/TH]

Between 6:34 p.m. and 7:24 p.m. on April 5	Between 21:34 and 22:24 on April 5	Between 6:34 a.m. and 7:24 a.m. on April 6	Between 11:34 p.m. and 12:24 a.m. on April 5/6

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Stéphane Israël‏ @arianespaceceo 1 ч. назад

Today's launch readiness review has cleared #Ariane5 for an April 5 liftoff with DSN-1/Superbird-8 and HYLAS 4. It will be #Arianespace's third launch so far in 2018. #SKYPerfectJSAT @Avanti_plc @NEC_corp #MELCO @OrbitalATK #VA242

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launch readiness review (LRR)

VA242_RAL_EN.pdf - 110.0 KB, 2 стр, 2018-04-03 16:35:49 UTC

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VA242 - Launch Campaign

arianespace

Опубликовано: 4 апр. 2018 г.

(2:34)

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Stéphane Israël‏ @arianespaceceo сейчас2 минуты назад


Another day, another step closer to liftoff -- #Ariane5 has reached the launch zone for its #VA242 mission w/ DSN-1/Superbird-8 and HYLAS 4, which is scheduled for April 5

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http://www.arianespace.com/mission-update/va242-ariane-5-launch-zone/

Ariane 5 | April 4, 2018

Ariane 5 moves to the launch zone for Arianespace's dual-payload mission on April 5


The Ariane 5 for Flight VA242 is shown midway in its transfer to the ELA-3 launch zone.

The DSN-1/Superbird-8 and HYLAS 4 satellites are another step closer to launch following the rollout of their heavy-lift Ariane 5, which occurred earlier today at the Spaceport in French Guiana.

With this transfer from the Spaceport's Final Assembly Building to the ELA-3 launch zone, Arianespace's third mission in 2018 can now enter its final countdown for liftoff on April 5.

Designated Flight VA242 in Arianespace's launcher family numbering system, tomorrow's Ariane 5 launch will deploy its two passengers to geostationary transfer orbit on a mission lasting just under 34 minutes from liftoff to final payload separation.

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A launch for Japanese and UK operators

As the 19th SKY Perfect JSAT satellite entrusted to Arianespace for launch, DSN-1/Superbird-8 is a dual-use relay platform. Its Superbird-8 payload uses high-performance Ku- and Ka-band transponders for communications services primarily in the Japanese market.

The spacecraft's DSN-1 (X-Band Defense Communications Satellite-1) payload is associated with the Program to Upgrade and Operate X-Band Satellite Communications Function, for which the DSN Corporation – a subsidiary of SKY Perfect JSAT – has concluded a contract with Japan's Ministry of Defense.

The HYLAS 4 satellite to be orbited on Flight VA242 is Avanti Communications' third spacecraft for launch by Arianespace from the Spaceport in French Guiana. This platform will deliver high-speed, reliable and secure satellite communications in Ka-band to Internet service providers (ISPs), mobile network operators (MNOs), governments and satellite operators across Europe.

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• A larger version of the photo above is available for downloading in the Gallery.
  

 
Launch window for Flight VA242:

[TH]French Guiana[/TH][TH]Universal Time (UTC)[/TH][TH]Tokyo, Japan[/TH][TH]Paris, France[/TH]

Between 6:34 p.m. and 7:24 p.m. on April 5	Between 21:34 and 22:24 on April 5	Between 6:34 a.m. and 7:24 a.m. on April 6	Between 11:34 p.m. and 12:24 a.m. on April 5/6

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DutchSpace‏ @DutchSpace 4 ч. назад

Launch day ! nice shot of #Ariane5 #VA242 inside the BAF before roll-out to the pad yesterday

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DutchSpace‏ @DutchSpace 4 ч. назад

And going to and arriving at the pad #Ariane5 #VA242

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4 ч. назад

Close-ups on the #ZL3 pad at #CSG #Ariane5 #VA242

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4 ч. назад

And almost ready for launch at dusk yesterday #Ariane5 #VA242

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DutchSpace‏ @DutchSpace 3 ч. назад

Close-up of the #Ariane5 #VA242 fairing #SKYPerfectJSAT @Avanti_plc @NEC_corp #MELCO @OrbitalATK


3 ч. назад

Placing the Japanese flag on the #Ariane5 #VA242 fairing #Japan #Nippon #日本

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DutchSpace‏ @DutchSpace 46 мин. назад

15:11:00 [L-08:23:00] EPC lines flushing #Ariane5 #VA242

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DutchSpace‏ @DutchSpace 3 мин. назад

16:11:00 [L-07:23:00] OBCs switch-on and flight program loading #Ariane5 #VA242

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DutchSpace‏ @DutchSpace 48 сек. назад

16:36:00 [L-06:58:00] EPC High-Pressure sphere pressurization #Ariane5 #VA242

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https://spaceflightnow.com/2018/04/05/ariane-5-va-242-mission-status-center/

Live coverage: Ariane 5 readies for first flight since off-target launch
April 5, 2018 | Stephen Clark

04/05/2018 19:00 Stephen Clark

Ground teams in French Guiana are counting down today to the first Ariane 5 rocket launch since a mission flew off course Jan. 25, deploying two communications satellites into an off-target orbit.

Liftoff is set for 2134 GMT (5:34 p.m. EDT; 6:34 p.m. French Guiana time) at the opening of a 50-minute launch window.

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Investigators probing the erroneous launch determined coordinates programmed into the Ariane 5's inertial reference units led the rocket approximately 20 degrees off course from its intended easterly trajectory seconds after liftoff Jan. 25.

The rocket performed as designed, but the incorrect navigation input caused it to place its two satellite payloads -- the SES 14 and Al Yah 3 communications satellites -- into an unplanned orbit. The spacecraft will make up for the orbit shortfall using their on-board fuel, but it will take longer than planned to place the satellites into commercial service.

For details about the investigation into the Jan. 25 launch anomaly, see our earlier story.

Investigators recommended Arianespace and its parent company, Ariane Group, to improve the way engineers develop and verify documentation before a launch, and to introduce additional consistency checks to prevent the recurrence of an error like the one Jan. 25.

Arianespace said the cause of the trajectory deviation during the Jan. 25 launch was "perfectly understood and corrective measures clearly identified." The recommendations were "immediately implemented," Arianespace said, and will be applied to the future Ariane 5 flights, beginning with a commercial mission due for blastoff today.

The Jan. 25 anomaly ended a streak of 82 consecutive flawless Ariane 5 flights dating back to 2003.

The payloads stowed aboard the Ariane 5 launcher set to fly from French Guiana today are the DSN 1/Superbird 8 and Hylas 4 communications satellites for Japanese and British customers.

The Ariane 5 rocket made the 1.7-mile (2.7-kilometer) journey from its final assembly building to the ELA-3 launch zone yesterday. A diesel-powered truck pulled the Ariane 5 and its mobile launch platform along dual rail tracks.

Once at the launch pad, the rocket was connected to ground electrical and fluid supplies in preparation for today's countdown. The Ariane 5's first stage liquid helium reservoir, used to pressurize the core stage's propellant tanks, was also filled.

The final countdown today commenced at 1011 GMT (6:11 a.m. EDT), with clocks at the Guiana Space Center timed for a targeted liftoff at 2134 GMT (5:34 p.m. EDT; 6:34 p.m. French Guiana time). Today's launch window extends until 2224 GMT (6:24 p.m. EDT; 7:24 p.m. French Guiana time).

Electrical systems checks on the Ariane 5 were to begin at 1101 GMT (7:01 a.m. EDT).

Workers also put finishing touches on the launch pad, including the closure of doors, removal of safety barriers and configuring fluid lines for fueling. The flight program for Wednesday's launch was also to be loaded into the rocket's computer.

The launch team will begin the process to fuel the rocket with super-cold liquid hydrogen and liquid oxygen propellants around 1656 GMT (12:56 p.m. EDT). First, ground reservoirs and the rocket's helium tank will be pressurized, then the fuel lines will be chilled down to condition the plumbing for the flow of super-cold liquid hydrogen and liquid oxygen, which are stored at approximately minus 423 degrees Fahrenheit and minus 298 degrees Fahrenheit, respectively.

It will take approximately two hours to fill the Ariane 5 core stage tanks.

A similar procedure for the Ariane 5's cryogenic upper stage will commence at 1806 GMT (2:06 p.m. EDT).

Chilldown conditioning of the Vulcain 2 first stage engine will occur at 1816 GMT (2:16 p.m. EDT), and a communications check between the rocket and ground telemetry, tracking and command systems is scheduled for 2019 GMT (4:19 p.m. EDT).

A final weather briefing will come at T-minus 10 minues, and then the computer-controlled synchronized countdown sequence will begin seven minutes before launch to pressurize propellant tanks, switch to on-board power and take the rocket's guidance system to flight mode.

The Vulcain 2 engine will ignite as the countdown clock reaches zero, followed by a health check and ignition of the Ariane 5's solid rocket boosters seven seconds later to send the 1.7 million-pound launcher skyward.

Five seconds after blastoff, the rocket will begin pitching east from the ELA-3 launch pad, surpassing the speed of sound less than a minute into the mission. The Ariane 5's twin solid rocket boosters will jettison nearly two-and-a-half minutes after liftoff.

Once above the dense atmosphere, the launcher's payload fairing will fall away at an altitude of more than 70 miles — about 112 kilometers -- at Plus+3 minutes, 28 seconds. The Ariane 5's first stage will shut down 8 minutes, 53 seconds, after liftoff, followed moments later by stage separation and ignition of the hydrogen-fueled cryogenic HM7B upper stage engine.

The rocket's upper stage will fire more than 16 minutes, accelerating to a velocity of 21,000 mph, or more than 9.3 kilometers per second, to reach an orbit with a planned high point of 35,786 kilometers (22,236 miles), a targeted low point of 250 kilometers (155 miles) and an inclination of 3 degrees.

The release of the DSN 1/Superbird 8 communications satellite, which rides in the upper position inside the Ariane 5's dual-payload accommodation, will come first. The exact time of its deployment has not been disclosed due to the satellite's mission for the Japanese military.

Once DSN 1/Superbird 8 is deployed, the Ariane 5 rocket's barrel-shaped Sylda 5 dual-payload adapter will be jettisoned at Plus+32 minutes, 15 seconds.

Hylas 4 will separate from the lower portion of the payload stack at 33 minutes, 56 seconds.

Both satellites will use their own engines to raise their orbits to a circular perch along the equator at an altitude of nearly 22,300 miles (35,800 kilometers).

Built by Mitsubishi Electric Corp. under the contract management of NEC Corp., the DSN 1/Superbird 8 satellite has a dual mission for commercial customers in Japan and the Japanese Ministry of Defense.

The commercial part of the satellite's payload, known as Superbird 8, will provide Ku-band an Ka-band communications services in the Japanese market for Sky Perfect JSAT Corp., replacing coverage currently provided by the aging Superbird B2 satellite launched in 2000.

The rest of the satellite's telecom capacity, operating in X-band frequencies, will be employed by the Japanese Ministry of Defense through a commercial provider named DSN Corp., a subsidiary of Sky Perfect JSAT. The Japanese military's first dedicated communications satellite, known as DSN 2, launched on an H-2A rocket in January 2017.

The 11,790-pound (5,348-kilogram) DSN 1/Superbird 8 spacecraft was supposed to launch on an Ariane 5 rocket in 2016, but the satellite was damaged during its transport to the launch base from Japan aboard a cargo plane. The satellite was returned to Japan for repairs.

The Hylas 4 communications satellite, built by Orbital ATK, will provide high-speed broadband services across Europe and Africa. Owned by London-based Avanti Communications, Hylas 4 will provide connectivity to mobile network operators and Internet providers, and beam high-speed services to civilian and defense users in governments.

The 8,928-pound (4,050-kilogram) satellite is based on Orbital ATK's GEOStar 3 spacecraft platform.

Both satellites launching today have missions expected to last at least 15 years.

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Arianespace‏ @Arianespace 5 мин. назад

Later today, #Ariane5 will take to the skies for #Arianespace's third mission of the year. Live coverage begins at 21:19 UTC on http://Arianespace.com . #VA242