Astronomy and Space News - Astro Watch: Arianespace Successfully Performs the First of 21 Launches for the OneWeb Constellation

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Friday, March 1, 2019

Arianespace Successfully Performs the First of 21 Launches for the OneWeb Constellation

Soyuz ascends from the Spaceport in French Guiana on Arianespace’s second mission of 2019, carrying the first six satellites for OneWeb. Credit: Arianespace

Arianespace’s second launch of the year - took place on Wednesday, February 27, at 6:37 p.m., (Kourou time) from the Guiana Space Center (CSG), Europe’s spaceport in French Guiana. By operating this maiden flight, the first of 21 launches contracted by OneWeb in 2015, Arianespace contributes to the fulfilment of its customer’s ultimate ambition: providing Internet access to everyone, everywhere.

The cluster of spacecraft – produced by the OneWeb Satellites joint venture of OneWeb and Airbus – was successfully deployed into a circular low Earth orbit on Arianespace’s first Soyuz mission of 2019 (and the launch services company’s second mission overall this year).

The workhorse medium-lift vehicle delivered its payload during a flight lasting 1 hour and 22 minutes. Total payload lift performance was estimated at 1,945.2 kg.

After an initial powered phase of Soyuz’ three lower stages, the flight – designated VS21 in Arianespace’s numbering system – included two burns of the Fregat upper stage to place its passengers at their targeted deployment point. Dramatic, real-time views of key flight sequences – including liftoff, fairing jettisoning, as well as the two-phase separation of the OneWeb spacecraft passengers – were captured by four on-board cameras.

Arianespace CEO Stéphane Israël congratulated OneWeb in his post-launch comments from the Spaceport and underscored the importance of Wednesday's Soyuz success for both companies: “This initial mission makes our ambitious partnership – built around the launch of more than 600 OneWeb satellites – a reality.”

OneWeb is building the world’s largest and highest throughput satellite system to connect everyone, everywhere – by land, air, sea with a vision to bridge the digital divide once and for all. The first six spacecraft will operate at an altitude of 1,200 km. in a constellation that will deliver extremely low latency for customers and provide communications access to the entire world with fiber-quality internet connectivity.

The initial constellation will be compromised of approximately 650 satellites and will scale to more than 900 spacecraft as it grows to meet demand around the world. OneWeb signed a contract with Arianespace in 2015 for a total of 21 Soyuz flights from three launch bases (the Spaceport in French Guiana; Baikonur Cosmodrome in Kazakhstan and Vostochny in Russia), to be performed through 2020.

Following the launch success, Stéphane Israël announced that Arianespace and OneWeb have reached an agreement that completes the current launch services order. This agreement is for OneWeb’s use of Ariane 6’s inaugural flight in its A62 version, as well as options for two future Ariane 6 missions.

The OneWeb constellation will support a wide range of markets, including aeronautics, maritime, backhaul services, community Wi-Fi, emergency response services and more. The operator also is focused on connecting unconnected schools and working to bridge the digital divide for people everywhere.

Speaking at the Spaceport, OneWeb CEO Adrian Steckel noted the group effort of many participants, including Arianespace, that led to the launch. “The notion of doing good is deep in the foundations of our company – and we are looking forward to doing our part in connecting the world, together with our partners,” he explained.

Nicolas Chamussy, Executive Vice President – Space Systems at Airbus Defence and Space, acknowledged Arianespace’s important role in this first step of establishing the OneWeb constellation. “I would like to thank Arianespace and Stéphane Israël: you and your teams have delivered spot-on, providing world-class access to space,” Chamussy said.

Wednesday’s success marked Soyuz’ 21st flight from the Spaceport since this vehicle’s 2011 introduction at French Guiana, as well as the second Arianespace mission from this equatorial launch site in 2019 – following the heavy-lift Ariane 5 flight that orbited Saudi Geostationary Satellite 1/Hellas Sat 4 and GSAT-31 on February 5.

With a busy launch schedule in 2019, Arianespace targets up to 12 missions from the Spaceport with Ariane 5, Soyuz and the light-lift Vega.

Credit: arianespace.com

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