UK military satellite Titania reaches orbit as MoD trials space-threat sensors

The UK’s second military satellite has reached orbit, as the Ministry of Defence (MoD) begins trials of a ground-based sensor network designed to detect potential threats to UK spacecraft.

Titania, launched in October, joins Tyche as part of the MoD’s expanding space-based intelligence, surveillance and reconnaissance (ISR) capability. UK Space Command will operate the satellite.

Titania demonstrates UK sovereign space capability

The Defence Science and Technology Laboratory (Dstl) and BAE Systems designed and built the new satellite in Hampshire under a £9.5 million contract.

“This programme highlights the strength of the UK’s sovereign space capability and the critical role it plays in protecting the nation. Building on our established heritage in space, we are proud to be investing in advanced technologies, strengthening specialist skills and supporting highly skilled jobs across the UK,” said Andrea Thompson, Managing Director, BAE Systems Digital Intelligence & Land. 

Titania weighs approximately 100kg and completes an orbit of Earth every 90 minutes, travelling at around 27,000km/h.

“Dstl has been at the heart of Titania, from the original concept, through Science and Technology investment, technical development, programme delivery, and successful launch,” said Dr Paul Hollinshead, Chief Executive Officer, Dstl. “The achievement reflects the expertise, resilience, and dedication of the Dstl team and showcases the value of long-term Defence Science and Technology investment, delivering mission success for our armed forces.”

Titania is part of the ISTARI UK military satellite programme

The satellite is part of the ISTARI programme, which is developing UK-controlled space-based ISR capabilities and supporting ground infrastructure.

Tyche, the programme’s first satellite, launched in August 2024. It carries an electro-optical imaging sensor with video capability. Titania will explore data technologies and capabilities. 

Two further projects are planned. Juno, being developed with Surrey Satellite Technology Ltd (SSTL), will carry an advanced electro-optical sensor. Airbus Defence and Space is developing Oberon, a two-satellite system equipped with synthetic aperture radar sensors for imaging in darkness and poor weather conditions.

Project Inaros to trial space-threat detection sensors

Alongside Titania’s deployment, the MoD has announced Project Inaros, a trial of three ground-based neuromorphic sensors developed by UK-Australian company Optera in partnership with the National Security Strategic Investment Fund.

The sensors will be installed at sites in the UK, Australia and UK facilities in Cyprus. They detect changes in light using technology that mimics biological processes, providing early warning of unusual or threatening activity near UK satellites.

Data from the trials will support UK Space Command units, including No. 1 Space Operations Squadron, No. 2 Space Warning Squadron and the newly established No. 3 Space Effects Squadron.

“Having Titania now in orbit and Project Inaros stepping up how we watch over our satellites means we can see threats sooner, making the UK safer,” said Defence Secretary Wes Streeting.

Air Chief Marshal Sir Harv Smyth, Chief of the Air Staff, added: “The ability to observe the Earth from space is critical to both national resilience and military advantage.”

£3bn investment in UK defence space capabilities

The 2025 Strategic Defence Review identified space as an increasingly important domain for national security.

The satellite programmes are part of more than £3 billion allocated to defence space capabilities in the Defence Investment Plan, “to protect UK assets in space and strengthen deterrence on Earth”, with a commitment to spend £298 billion over the next four years.