The Final Barrier to High-Performance Computing in Space: Architectures for Mitigating Catastrophic Radiation Effects

The increasing ambition of commercial and institutional space missions is driving demand for onboard computing capabilities far beyond traditional spacecraft avionics. Applications such as orbital data centers, large satellite constellations, autonomous mission operations, and real time data processing increasingly depend on high performance GPUs, advanced processors, high density solid state storage, and complex commercial electronic assemblies. While commercial off the shelf electronics offer unmatched capability and development speed, their reliable operation in space remains a central engineering challenge.
While traditional environmental hazards like Total Ionizing Dose (TID), Single Event Upsets (SEU), and thermal-vacuum effects are well-managed through established engineering practices, Catastrophic Single Event Effects (CSEE) remain a critical barrier. Traditional mitigation, such as radiation hardening or current monitoring, is often impractical for high-current, highly integrated commercial assemblies.
This presentation introduces a system-level mitigation architecture that addresses CSEE. By detecting and characterizing the particles that generate the CSEE, rather than hardening or detecting the implications of the phenomenon, it is possible to mitigate the event before CSEE induced thermal damage occurs, thus providing an unobtrusive mitigation architecture.
The architecture was evaluated via GEANT4 simulations and validated through a spaceborne experiment on the International Space Station (ISS). Recording over 500 million particle events in low Earth orbit, the experiment provided a robust comparison between modeled and measured environments. Results demonstrate that destructive events can be identified with high statistical confidence, thus extending COTS lifetime in the space environment significantly.
By addressing the primary remaining obstacle to using advanced commercial hardware, this architecture provides a practical framework for high-performance space computing. These findings are intended for avionics architects and engineers designing next-generation orbital infrastructure where performance and reliability must coexist.