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Space

UK secures leading role in Vigil mission

UK Space Minister Andrew Griffith was in Brussels yesterday, where he witnessed the signing of a major industrial contract that will see Airbus Defence and Space in Stevenage building Europe’s flagship space weather mission, Vigil.

Image copyright Airbus

Airbus has been selected by the European Space Agency (ESA) to design and build the space weather forecasting satellite Vigil, the first operational mission in ESA’s Space Situational Awareness (SSA) Space Safety Programme (S2P). The spacecraft will give vital extra warning to Earth about incoming solar storms and coronal mass ejections which can potentially disrupt satellites in orbit and electronic and power distribution systems on Earth.

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Patrick Wood, Head of Space Systems UK, Airbus Defence and Space said: “Vigil is one of the most exciting and important space missions that will not only improve our understanding of the Sun’s behaviour but crucially provide us with earlier warning and greater precision about potentially damaging solar weather. Space weather forecasters will be able to see what is coming from the Sun and provide more accurate alerts.”

Andrew Griffith MP, Minister for Space at the Department for Science, Innovation and Technology, said: “Space weather generates stunning phenomena like the recent displays of the Northern lights over our skies - but it also presents a real risk to our way of life which is increasingly dependent on space and satellite services. The Vigil mission will transform our understanding of the impact of potentially dangerous solar events and I congratulate Airbus here in the UK on taking the lead in this important mission.”

Vigil will be positioned at Lagrange point L5 on the same orbit as the Earth, 150 million km behind it as the Earth orbits the Sun. This will enable Vigil to see the Sun as it rotates, and see the size and speed of solar weather heading towards the Earth. Data from Vigil could provide notice of four to five days of solar winds streaming toward Earth.

From its particular vantage point, Vigil will complement other satellites monitoring the Sun from closer to the Earth. Among the most potentially damaging events are coronal mass ejections (CMEs) from the Sun, consisting of a magnetised plasma containing protons, electrons and other charged particles. In 1989 a major geomagnetic storm struck Earth and caused a nine-hour outage of electricity transmission across Quebec.

Advance warning of incoming CME will enable power companies and authorities to shut down systems temporarily to protect them from power surges and ensure they can be powered up quickly after the danger has passed. This will avoid longer power outages and major damage to electronic systems used for global positioning and communication services.

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Josef Aschbacher, ESA Director General, said: "Vigil will be Europe’s first 24/7 operational space weather satellite, providing valuable time to protect critical infrastructure such as power grids or mobile communication networks on Earth as well as valuable satellites in Earth orbit, including the International Space Station (ISS). Vigil will drastically improve both the lead time of space weather warnings as well as their level of detail from its unique vantage point in deep space."

Vigil, which will be built in the UK, will include a compact coronagraph developed by the US Naval Research Laboratory, a heliographic imager from Florence-based Leonardo SpA and a photo-magnetospheric field Imager from Germany’s Max Planck Institute. In addition, Vigil will carry a plasma analyser from the Mullard Space Science Laboratory in London and a magnetometer from Imperial College London. NASA is providing Vigil’s sixth instrument, an extreme ultraviolet imager.

The spacecraft platform will provide the best environment for high-quality scientific measurements, including tight magnetic cleanliness and contamination control measures. Being an operational mission, the design of the satellite has to be extremely resilient to ensure the continuous, flawless operation of its instruments and high reliability in data transmission for users, especially in case of a major solar event.

Vigil was selected by ESA in 2022 and is supported by the UK Space Agency and other member states of ESA. The UK’s Met Office has a dedicated space weather forecasting department which will use the data from Vigil to offer the world more accurate forecasts.

Vigil, due to be launched in 2031, will be the first ESA spacecraft to be positioned at L5 and is designed to operate in orbit for more than 7.5 years.

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