Category Archives: Space Exploration

European Space-Based 5G Takes Flight: CTO and ESA Team Up for Low Earth Orbit Connectivity Revolution

Imagine a world where high-speed 5G doesn’t stop at the end of a fibre line, but continues seamlessly across mountains, oceans, and rural blackspots—delivered straight from space. That’s the vision behind a new partnership between Constellation Technologies & Operations (CTO) and the European Space Agency (ESA), who are set to trial Europe’s first 5G mmWave payload in low Earth orbit.

The Mission: Making 5G Truly Universal

In an agreement signed this May at ESA HQ in Paris, CTO and ESA have announced a joint effort to launch a “regenerative” 5G payload aboard a satellite scheduled for June 2025. This Early Test represents Europe’s first real-world demonstration of a 5G infrastructure designed and built on the continent.

Unlike conventional satellite relays, this payload will process signals directly in orbit. The result? Reduced latency, increased efficiency, and seamless interoperability with ground-based 5G networks. Think of it as a space-based extension of mobile infrastructure.

Why This Matters

Space-based connectivity is currently dominated by American and Chinese ventures. CTO offers a credible European alternative: a neutral, shared, and independently operated satellite network that empowers telecom operators to extend their services without surrendering control or investing in expensive infrastructure.

The potential impact is enormous. This technology could bring fast, reliable internet to remote communities, disaster zones, and other underserved areas—complementing terrestrial networks and filling in the gaps where traditional infrastructure falls short.

How It Works

The test payload will operate using telecom operators’ 5G FR2 mmWave spectrum. CTO’s future constellation, planned for Very Low Earth Orbit (VLEO), is designed for high-speed, low-latency communication. Working with ESA’s ECSAT facility in Oxfordshire, this trial is a crucial step in proving Europe’s capability to lead in next-generation satellite communications.

CTO’s model allows telecom operators to leverage their existing 5G spectrum in space, offering a scalable solution that complements fibre and mobile networks without the need for ground-based towers in hard-to-reach areas.

What They Said

Charles Delfieux, CEO of CTO, commented: “This alliance with ESA reflects a shared ambition: to build a competitive European sovereignty in space connectivity, powered by bold technology designed and developed in Europe. We’re proving that it’s possible to compete on a global scale without compromise—giving telecom operators back control over their future in space.”

Laurent Jaffart, Director of Connectivity and Secure Communications at ESA, added: “This agreement aligns with ESA’s strategy to support the rise of innovative European players and jointly build resilient connectivity. The upcoming tests with CTO will pave the way for new hybrid use cases at the intersection of terrestrial and space networks.”

Images courtesy of ESA / CTO
Images courtesy of ESA / CTO

What’s Next

The satellite launch planned for June 2025 marks just the beginning. CTO and ESA are already collaborating on future in-orbit testing campaigns and knowledge sharing to maximise the impact of this project.

A European Vision, Global Potential

With its bold approach to hybrid connectivity, CTO aims to reshape the telecommunications landscape. This is more than just a technical trial—it’s a strategic move to establish European leadership in space-based internet services and offer a compelling global alternative to today’s dominant players.

Stay tuned to The Gadget Man as we follow this pioneering initiative. With space now firmly on the telecom agenda, the future of connectivity is looking skyward.


More Information:
www.constellation.global
www.esa.int

Images courtesy of ESA / CTO

UK Company PULSAR Demonstrates Green, High Power Rocket Engine and Big Ambitions

Pulsar Fusion Ltd, a UK nuclear fusion company based in Bletchley, has just developed and tested its first launch capable, high-power chemical rocket engine in the UK.

These rocket engines could be used for a variety of applications, including launching people and satellites into space.

The company’s ultimate ambition in the future is to produce a hyper-speed propulsion engine using nuclear fusion technologies for interplanetary travel – which scientists think could cut the journey time to Mars in half.

This successful set of test firings showcases the rapid design development and test process of high-performance engineering components to support Pulsar Fusion’s energy and propulsion hardware portfolio roadmap. The rocket engine proudly displayed the Union Jack flag during testing.

UK Company PULSAR Demonstrates Green, High Power Rocket Engine and Big Ambitions
UK Company PULSAR Demonstrates Green, High Power Rocket Engine – Photo Credit Pulsar Fusion Ltd

Pulsar’s UK acceptance tests at COTEC – Ministry of Defence military base in Salisbury, took place on November 17 and 18, 2021 (As pictured) which were static tests. These will be followed by an international demonstration for space clients in Switzerland on November 25.

This hybrid rocket engine has demonstrated impressive visual plume effects such as supersonic shock diamonds typical of a high temperature, high mass flow rate rocket exhaust.

UK Company PULSAR Demonstrates Green, High Power Rocket Engine and Big Ambitions

CEO – Richard Dinan, commented: “We are delighted with the UK test firings at COTEC. It is a hugely significant moment and we are proud this rocket is built in the UK. To have a British rocket test on UK soil is novel.

“Pulsar is among a very few companies around the world to have built and tested these technologies. We have a team of fantastic scientists with a wealth of experience to thank for these milestones. We have also drawn talent from some of the UK’s top universities who have begun working with and testing our plasma thrusters at campus facilities. We are extremely proud of these achievements and look forward to expanding our network with the British and European space community with our hardware demonstration later this month in Switzerland.”

Pulsar’s ‘green’ (non-toxic) hybrid rocket engine combusts nitrous oxide (N2O) oxidiser and high-density polyethylene (HDPE) fuel and oxygen.  It is a new model that enables Pulsar to manufacture these compact rocket engines at record lead times, with an enhanced safety factor as due to the design, these engines have relatively benign failure modes in comparison with conventional liquid propulsion engines.

A hybrid rocket engine has the following main components and requires control of only one fluid – a liquid oxidiser during testing. Liquid oxidiser is fed under a regulated pressure through a control valve into a combustion chamber containing a technology as proprietary.

Pulsar Hybrid Rocket Engine
Pulsar Hybrid Rocket Engine – Credit Pulsar Fusion Ltd

Pulsar Fusion received UK government funding in September 2021 to further develop its HET (Hall Effect Thruster) plasma satellite engines, capable of 20 km / second particle exhaust speeds. These Pulsar thrusters have recently been tested at Harwell’s facilities where they withstood 20g’s of vibration, simulating a rocket launch. Pulsar now seeks to IOD test these engines. (In Orbit Demonstration).

Pulsar Hybrid Rocket Engine
Pulsar Hybrid Rocket Engine

The vision:

The company’s ultimate milestone is to produce a hyper-speed propulsion engine using nuclear fusion technologies of which it has been researching for nine years which could eventually be used for interplanetary travel – and which scientists say could halve the journey time from Earth to Mars. A first prototype is expected in 2025.

Pulsar Hybrid Rocket Engine
Pulsar Hybrid Rocket Engine Test Firing.

About the company:

Pulsar Fusion is an advanced propulsion technologies company. It manufactures compact and efficient satellite engines for use in orbit, and liquid rocket engines for launch and atmospheric propulsion.

By 2025 – the company wants to develop nuclear fusion propulsion engines for static demonstration.

By 2027 – the company wants to manufacture a nuclear fusion rocket engine to be launched and tested in orbit.

Pulsar’s fusion propulsion systems are enabled by the technology generated in the rocket engine programme.