SPE Alert and Response
Solar Particle Event Alert + Automated Response
The Solar Particle Event Alert and Automated Response system is autonomous control software stored on radiation-hardened NOR flash that fuses spectrometer data, single-event effect rates, and space-weather forecasts to detect incoming radiation events within five minutes. Upon detection, it automatically sheds non-critical power loads, initiates increased shielding postures, and commands surface robots in transit to seek shelter. Rapid execution is essential on the lunar surface, where the absence of a protective magnetosphere exposes assets to solar particle events with proton energies peaking near 25 gigaelectronvolts, intensities capable of briefly overwhelming passive shielding and inducing single-event upsets across unhardened electronics.
Real-time SPE detection (from SEE rate + spectrometer + space-weather forecast) triggering automated response: load shed, safe mode for sensitive operations, increased shielding posture.
Purpose
Real-time SPE detection (from SEE rate + spectrometer + space-weather forecast) triggering automated response: load shed, safe mode for sensitive operations, increased shielding posture.
Context
Child of L2-RAD-MON within the Lunar Ark system
Principles
- ▸SPE detected by multi-source fusion (SEE + spectrometer + forecast)
- ▸Automated response: pause non-critical ops, retract robots to shelter
- ▸Coordination with L2-CDH-AUTO for graceful degradation
- ▸Alert duration matched to event onset/decay
- ▸Post-event analysis informs future response tuning
Typical implementations
- ▸NOAA SWPC space-weather alerts (heritage)
- ▸ISS SPE response procedures
- ▸Spacecraft SPE auto-response (e.g., JUICE)
Lunar considerations
- ▸SPE peak ~25 GeV protons can overwhelm shielding briefly
- ▸Robots in transit safe-housed during event
- ▸Long-mission accumulated SPE data inform shielding upgrades
Specifications
Functional
| primary function | Real-time SPE detection (from SEE rate + spectrometer + space-weather forecast) triggering automated response: load shed, safe mode for sensitive operations, increased shielding posture. |
| detection latency min | 5 |
| false alarm rate per year | 1 |
Physical
| mass kg | 0 |
| materials | Code on rad-hard NOR flash |
| vacuum compatibility | True |
Operational
| power consumption w | 1 |
| thermal range c | -40, 70 |
| lifetime years | 100 |
| mtbf hours | 500000 |
Interfaces
Provides
- SPE alert + response trigger
- Robotic safe-housing command
Requires
- SEE rate input
- Particle spectrum input
- Earth-based space-weather forecast
Cite this entry
Lunar Ark Codex. "SPE Alert and Response" (L3-RAD-MON-ALERT). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-RAD-MON-ALERT
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.