A UK-led research mission aimed at advancing space-based quantum communications has launched aboard a SpaceX Transporter-16 rocket from Vandenberg Space Force Base in California. The Satellite Platform for Optical Quantum Communications, or SPOQC, was developed under the Integrated Quantum Networks (IQN) Hub led by Heriot-Watt University and was launched on 30 March 2026.
The mission builds on research and development carried out first through the Quantum Communications Hub and later through the IQN Hub, both funded by the Engineering and Physical Sciences Research Council. Five UK research institutions are involved in the collaboration, which is intended to strengthen UK capabilities in space-based quantum communications as governments and researchers prepare for the cybersecurity implications of more powerful quantum computing systems.
SPOQC is now in the final stages of commissioning before it begins transmitting quantum signals to receivers at the Hub Optical Ground Station at Heriot-Watt University in Edinburgh. The CubeSat is operating in a low Earth, Sun-synchronous orbit and passes over the UK about twice a day, with most measurements expected to take place during night-time passes, when experimental conditions are more favourable.
The mission’s wider policy relevance lies in its connection to the UK’s National Quantum Strategy, which views quantum technologies as important to national resilience, digital infrastructure, and long-term competitiveness. The project presents satellite-based systems as the most practical route towards resilient international quantum communication, since terrestrial fibre links face distance-related limitations that can degrade quantum signals over time.
A distinctive feature of the mission is its dual quantum source payload. One source uses discrete quantum signals at the single-photon level and was developed by the University of Bristol team, while the other uses continuous-variable signals and was developed by researchers at the University of York. Both connect to dedicated receivers at the optical ground station, allowing researchers to compare two established but technically different communication methods under varying atmospheric and orbital conditions.
‘The SPOQC mission is the culmination of outstanding collaborations between leading UK Universities, STFC RAL Space, and external industry partners. It offers a world-first platform to critically compare different quantum communication modalities, including the first use of continuous variable approaches from space. Through the IQN Hub, the SPOQC mission is a vital enabler towards truly global quantum communication via integration into terrestrial UK networks.’, said Professor Gerald Buller, Director of the IQN Hub.
The collaboration brings together the Universities of Bristol, Heriot-Watt, Strathclyde and York, alongside the Science and Technology Facilities Council’s RAL Space. STFC RAL Space contributed engineering, systems integration and mission support, while Heriot-Watt is operating the optical ground station. ISISPACE provided the satellite and technical support.
Full quantum communication experiments are expected to begin in the second half of 2026 once commissioning is complete. Professor Tim Spiller from the University of York said: ‘As Director of the preceding Quantum Communications Hub, it is very pleasing to see six years of R&D by that Hub team to develop SPOQC and HOGS finally be rewarded with the launch of SPOQC. However, this will add a crucial link to the UK’s expanding quantum networking capability. I look forward to the first quantum demonstrations from SPOQC and HOGS later this year.’
Andy Vick, Disruptive Technology Programme Lead at STFC RAL Space, said: ‘The launch of two quantum CubeSats in close succession highlights the UK’s growing leadership in quantum technology. While both missions share a common satellite platform, SPOQC has united new partners to address new challenges. The RAL Space team is proud to have contributed from the outset, working closely with the Quantum Communications Hub, whose initial work laid strong foundations for the mission, and now supporting its delivery under the leadership of the IQN Hub. SPOQC is a big step for all the teams involved, one that we hope will pave the way for the UK’s national quantum network mission.’
Dr Kedar Pandya, Executive Director of EPSRC’s Strategy Directorate, said: ‘The SPOQC mission is a powerful example of how UK research leadership is shaping the future of secure global communications. By uniting world-class expertise across our quantum research hubs, we’re demonstrating not only scientific excellence but real technological ambition. This launch marks a major step toward quantum-secure networks that will help safeguard the UK’s digital infrastructure for decades to come.’
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