DragonSat
Defence Quantum

DragonSat is a pioneering PocketQube satellite advancing the frontiers of secure quantum communications for defence and national security. This mission carries a cutting‑edge quantum optics payload into orbit.

Our Team

Pioneering Quantum Optics in Space for Defence

Our DragonSat mission is advancing the future of secure quantum communications by conducting a groundbreaking quantum optics experiment in space. Utilising a state‑of‑the‑art 1.5P PocketQube satellite, DragonSat will test quantum entanglement and coherence in the unique microgravity environment of low Earth orbit. These experiments aim to unlock the potential of space‑based quantum networks, enabling next‑generation encrypted links and resilient communications for defence and national security operations.

At the core of the DragonSat spacecraft is a highly efficient, mission‑grade power system engineered to sustain secure quantum communications research in orbit. The Quantum Light Module payload operates on an average power draw of just 1 W, achieved through the integration of high‑efficiency components and intelligent power management. This ensures that the spacecraft’s limited energy reserves are allocated optimally to maintain continuous operational readiness.

DragonSat SPACECRAFT SPECIFICATIONS

PocketQube: 1.5P Chassis
Payload Average Power: 1W
ADCS: Passive Bar Magnet
Mass: 250g
Payload: Quantum Light Module
Antenna: Deployable 437 MHz UHF dipole antenna
Payload Data Downlink:1.2kb/s (UHF)

Cutting‑Edge Defence Quantum Communications Technology

The DragonSat mission’s payload is a miniaturised, defence‑grade quantum communications system designed to test and advance secure space‑based quantum networks. At its core is a compact source of entangled photons, generated through spontaneous parametric down‑conversion (SPDC), enabling quantum key distribution and other encrypted communication protocols to operate with unprecedented security in orbit.

The payload is engineered to prepare, transmit, and measure quantum states with exceptional precision, ensuring mission‑critical performance despite the challenges of microgravity and space radiation. An onboard data processing unit conducts real‑time analysis and secure storage of experimental results, while a resilient power system, comprising solar arrays and high‑capacity batteries, ensures continuous operation. These capabilities will inform the development of sovereign, space‑based quantum communications infrastructure, strengthening national security and operational advantage in the contested space domain.

Pioneering Defence Capability with PocketQube Technology

DragonSat is a cutting‑edge 1.5P PocketQube satellite engineered for secure, mission‑critical operations in the space domain. DragonSat is constructed from high‑strength anodised Aluminium 6061‑T6 for enhanced durability in the harsh orbital environment. Weighing ≤ 250g and measuring just 50mm x 50mm x 50mm, DragonSat is optimised for efficiency, resilience, and rapid deployment. Equipped with multi‑layer insulation (MLI) and conductive paint for precise thermal regulation, it is fully compatible with AlbaPod and other deployers meeting PQ9 standards. Rigorously tested to withstand 14g RMS launch loads, DragonSat represents a new frontier in compact, high‑performance satellite technology, delivering sovereign capability for defence, intelligence, and secure communications missions.

Power and Computing Systems for Defence‑Grade DragonSat Operations

DragonSat is equipped with a mission‑critical power subsystem engineered for secure and sustained operations in the space domain. Its triple‑junction GaAs solar panels achieve ~30% efficiency, generating approximately 1 W of power depending on sunlight exposure, ensuring consistent energy supply for defence payloads. A robust Li‑Po/Li‑Ion battery with a 1000 mAh capacity (~3.7 Wh) provides reliable energy storage, while the Power Distribution Unit (PDU) delivers regulated 3.3 V and 5 V outputs to support sensitive communications and control systems. Integrated Maximum Power Point Tracking (MPPT) technology optimises energy harvesting for long‑duration missions, maintaining operational readiness and resilience in both peacetime and contested orbital environments.

A New Frontier in Defence Quantum Communications

By deploying the Quantum Light Module aboard a PocketQube satellite, DragonSat will conduct pioneering experiments in secure quantum communications, focusing on quantum entanglement and coherence in a microgravity environment. These trials will advance the UK’s sovereign capability in quantum systems beyond Earth's gravitational influence, delivering critical insights for the development of next‑generation encrypted space‑based networks to support defence, intelligence, and national security operations.

For onboard computing and data handling, DragonSat is equipped with an ARM Cortex‑M4 or RISC‑V‑based microcontroller, operating at ~100–200 MHz and paired with 512 KB RAM and 8 MB Flash storage, with optional SD card expansion. The system runs on a Real‑Time OS (RTOS) or custom firmware, supporting I²C, SPI, UART, and GPIO interfaces for secure communication and precision control. To ensure mission assurance, the satellite features a watchdog timer and reset mechanisms for redundancy and fault tolerance, maintaining uninterrupted operation in the harsh and contested conditions of space.

Secure and Resilient Communications for Defence Operations

DragonSat’s communication subsystem delivers assured, encrypted data transmission and reception via a robust UHF (437 MHz) link, engineered for mission‑critical performance in the space domain. Its deployable dipole antenna supports a 1.2 kbps data rate using Gaussian Frequency Shift Keying (GFSK) modulation, while the transceiver, configurable up to 100 mW balances secure link reliability with optimised power consumption. To safeguard signal integrity, DragonSat employs Reed‑Solomon and convolutional encoding for advanced error correction, ensuring data resilience in contested and degraded space environments. Fully compatible with secure ground‑station networks, DragonSat enables global tracking, command, and mission support, reinforcing its role as a sovereign communications asset for defence and national security operations.

A PocketQube Engineered for Defence and the Future

DragonSat is a pioneering PocketQube satellite designed to deliver sovereign capability in the rapidly evolving space domain. This flagship mission unites defence innovators, research institutions, and strategic industry partners to push the boundaries of secure, space‑based quantum communications. Built for cutting‑edge experiments in quantum entanglement and coherence within the microgravity environment of low Earth orbit, DragonSat will generate critical insights to advance encrypted quantum networks. These outcomes will lay the foundation for next‑generation, space‑based communications technologies that enhance national security, operational resilience, and strategic advantage in contested environments.

Attitude Determination and Control System for Defence Operations

The spacecraft’s Attitude Determination and Control System (ADCS) is a mission‑critical element of DragonSat’s design, ensuring stable, reliable performance for defence and national security payloads. DragonSat employs a passive bar magnet for orientation control, leveraging the Earth’s magnetic field to maintain passive stabilisation in orbit. This low‑power approach delivers exceptional energy efficiency, removing the need for complex, energy‑intensive active control systems and reducing potential points of failure. By maintaining precise payload alignment throughout the mission, the ADCS safeguards the integrity of sensitive quantum experiments, ensuring accurate data capture and minimising interference, even in contested or degraded space environments.

Compact and Lightweight: Strategic Payload and Mass Efficiency

DragonSat has been engineered for maximum efficiency in a defence‑grade PocketQube form factor, with a total mass of just 250 g. This ultra‑low mass enables rapid deployment on small‑scale launch vehicles or integration into larger satellite constellations, supporting dispersed, resilient architectures. Its compact design makes DragonSat an ideal platform for low‑cost, high‑impact missions where minimal size and weight are critical to operational flexibility and rapid response.

This mass‑efficient architecture not only reduces launch costs but also increases the feasibility of deploying multiple spacecraft for constellation‑based operations within tight budget and time constraints. Despite its small size, DragonSat integrates all systems required to execute complex quantum communications research, demonstrating that compact platforms can deliver sovereign, mission‑critical capability in the contested space domain.

Deployable Antenna System for Secure, Mission‑Critical Data Transmission

DragonSat’s payload data downlink operates at 1.2 kb/s via UHF frequencies, delivering a continuous, assured stream of mission‑critical data from orbit to authorised ground control. Optimised for the secure transfer of quantum experiment results, including measurements of entanglement and coherence, this link ensures that essential intelligence can be relayed in real‑time or at scheduled intervals to support defence and national security objectives. The deployable dipole antenna and robust transceiver architecture provide reliable performance in contested and degraded space environments, while advanced error‑correction protocols safeguard data integrity. By maintaining a low data rate, the system minimises power consumption, enhancing overall energy efficiency and ensuring sustained operational readiness throughout the mission.

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