Shielding airborne silicon against atmospheric neutrons, cosmic rays, and latch-up events at FL450.
At cruising altitudes, cosmic ray flux increases neutron-induced Single-Event Upsets (SEU) by up to 300x compared to sea level. Nanometer transistors require architectural redundancy to prevent bit flips from corrupting flight logic.
Dual physical cores execute identical instructions simultaneously. If comparator hardware detects a single-cycle mismatch, the fault is isolated, registers are reloaded from certified checkpoints, and execution continues without interruption.