Your question is Watchdog Recovery for SEU. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How would you design a software-based watchdog timer system to recover a microcontroller that has hung due to a single-event upset (SEU) in a high-radiation environment for Scout Space?