Flying on rexus
The Mission
The Experiments
BOLT explores Li-Fi for intra-satellite communication: a free-space optical link beaming data between subsystems without radio interference. The mission subjects the hardware to the same shocks, cold starts and potential faults we expect in orbit, giving us a realistic playbook for future payloads.
Building on the research of project SatelLight, we are part of the REXUS/BEXUS Programme, participating in the REXUS 37/38 campaign and flying on REXUS 37. It pushes light-based communications through launch loads and microgravity, helping us map out how optical links behave when the stakes - and the vibrations - are high.
Payload design
LiFi experiments on the REXUS payload bus
- The Bus: data collection and ground communications through our custom Bifröst TestController
- Experiment 1: Space Disco examines the effects of atmospheric scattering and absorption on RGB-LiFi implementation
- Experiment 2: Bouncy Castle tests the error resistance of LiFi against the temporary blockage of the optical path
- Experiment 3: Floaty Boi implements a mostly isolated sensor, which studies the feasibility of combined power- and data transfer using LiFi.
Overall, we hope that BOLT will stress test the LiFi research from the Smart Sensors Group in a near-space environment and help raise the technology’s Technology Readiness Level.
Mission in Progress
Timeline Milestones
Summer 2026
Hardware Integration
Fall 2026
Environmental Trials
Winter 2026
Campaign Rehearsals
Spring 2027
Flight & Debriefs
What is REXUS?
Rocket Experiments for University Students
The REXUS/BEXUS programme is realised under a bilateral Agency Agreement between the German Aerospace Center (DLR) and the Swedish National Space Agency (SNSA). The Swedish share of the payload has been made available to students from other European countries through a collaboration with the European Space Agency (ESA). EuroLaunch, a cooperation between the Swedish Space Corporation (SSC) and the Mobile Rocket Base (MORABA) of DLR, is responsible for the campaign management and operations of the launch vehicles. Experts from DLR, SSC, ZARM and ESA provide technical support to the student teams throughout the project. REXUS and BEXUS are launched from SSC, Esrange Space Center in northern Sweden.
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