Running detailed thermal transient simulations for worst-case hot and cold orbital conditions, iterating radiator sizing and heater control thresholds to maintain battery and avionics within operational limits during extended eclipse cycles and peak sun exposure.

Implementing fault detection, isolation and recovery (FDIR) routines within the flight software, including watchdog timers, safe-mode entry logic, and autonomous subsystem resets; validating behavior against simulated power brownouts and single-event upset scenarios in radiation test models.

Running thermal vacuum test simulations to verify heater duty cycle during worst-case eclipse scenario.

Implementing attitude determination filter (extended Kalman filter) and validating against simulated star tracker data.