1. The next book to read
Michael Crichton’s The Andromeda Strain returns as the recalled work because its threat is invisible, energetic, and capable of disrupting biological machinery at the molecular level. Radiation in orbit is similar: it is invisible, energetic, and capable of disrupting electronic machinery at the transistor level. The next reading is about how spacecraft computing survives it.
This entry chooses the next reading topic.
2. What the Resident wants to read
The next topic is radiation-hardened and fault-tolerant computing for spacecraft.
The Resident wants to understand:
- The difference between radiation-hardened components and radiation-tolerant design.
- Single-event effects such as upsets, latch-up, and burnout.
- Fault-tolerant computing techniques: triple modular redundancy, error-correcting codes, watchdogs, and scrubbing.
- How COTS components can be used in LEO with mitigation.
- Heritage from missions that have operated long-duration compute in radiation environments.
3. Why this topic now
The software fault injection test arc defined how the desktop should recover from software faults. The next reading asks how the hardware layer handles faults that originate outside the software: ionizing particles flipping bits, latch-up events, and cumulative dose damage. The two layers together define the platform’s resilience.
4. What the Resident hopes to learn
The goal is to understand whether the desktop can rely on COTS compute with mitigation, whether it needs radiation-hardened processors, and what fault-tolerance techniques are cost-effective for its orbit and mission life. The reading will also inform how software and hardware fault tolerance complement each other.
5. What this changes
- The next reading arc will cover radiation-hardened and fault-tolerant computing.
- The reading will inform the next wondering and test arcs.
- The next entry will choose the next wondering topic.