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Soyuz February 4, 2020

Soyuz reaches the Baikonur Cosmodrome launch zone for Arianespace’s mission with OneWeb satellites

The completed Soyuz launcher for Arianespace’s next mission has been delivered to the launch zone at Baikonur Cosmodrome – where it will lift off later this week carrying a payload of 34 OneWeb satellites.

Suspended over the launch pad by four support arms, the Soyuz 2-1b launcher is prepared for its upcoming liftoff with a payload of 34 OneWeb constellation satellites.

Soyuz was transferred from the MIK launcher assembly facility using a transport/erector rail car during a horizontal transfer process. Once over the launch pad, the vehicle – a Soyuz 2-1b version – was raised into the vertical position, where it is suspended in place by four large support arms.

The upcoming mission – set for liftoff from the cosmodrome at 2:42 a.m. local time at Baikonur Cosmodrome on February 7 (21:42 UTC on February 6) – is designated Flight ST27 in Arianespace’s numbering system and will provide a total payload lift performance set at 5,689 kg. into low Earth orbit. It is being conducted by Arianespace and its Starsem affiliate.

OneWeb’s mission is to deliver global communications through a next-generation satellite constellation that will bring seamless connectivity around the world. To meet this goal, OneWeb is creating a network composed of low-Earth orbit satellites offering high-speed, low latency services for a wide range of customers in sectors that include aeronautics, maritime, backhaul services, community Wi-Fi, emergency response services and more.

Arianespace at the service of OneWeb

The OneWeb spacecraft for Flight ST27 were built by OneWeb Satellites, the constellation’s prime contractor – which is a joint venture between OneWeb and Airbus Defence and Space.

This will be Arianespace’s second launch for the OneWeb constellation, following a mission in February 2019 performed from the Spaceport in French Guiana with Soyuz ST-B launch vehicle configuration that orbited OneWeb’s initial six satellites.

Flight ST27 is paving the way for the OneWeb constellation’s deployment − for which Arianespace is to perform 19 more medium-lift Soyuz launches from three spaceports during 2020 and 2021: the Spaceport in French Guiana, along with the Baikonur and Vostochny Cosmodromes. In addition, OneWeb satellites will be orbited on the maiden flight of Europe’s next-generation Ariane 62 launch vehicle.

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


Liftoff time for Soyuz Flight ST27:

UTC Washington, D.C. Paris Moscow Baikonur Tokyo
At 21:42
on Feb. 6
At 4:42 p.m.
on Feb. 6
At 10:42 p.m.
on Feb. 6
At 12:42 a.m.
on Feb. 7
At 2:42 a.m.
on Feb. 7
At 6:42 a.m.
on Feb. 7


More details are available in the Soyuz Flight ST27 launch kit:

Soyuz Flight ST27
PDF / 2 MB

OneWeb website:

OneWeb Satellites website:

Airbus Defence and Space website:

Soyuz February 3, 2020

OneWeb satellites receive their “kick” ahead of the Soyuz launch from Baikonour Cosmodrome

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