SC-45 - System Time Synchronization

Synchronize system clocks within and between systems and system components.


ID: SC-45
Enhancements:  1 | 2

Space Segment Guidance

Accurate time underpins authentication replay defenses and forensic reconstruction. If the policy allows, equip the flight computer with a temperature-compensated crystal oscillator disciplined by periodic ground updates or a space-qualified GNSS receiver. Store the delta between oscillator time and reference time in telemetry so operators can detect drift trends and command an adjustment before the skew exceeds log correlation tolerance. During safe mode, the oscillator free-runs yet continues to timestamp critical events, preserving an unbroken chronology through outages.