Internal clock not synchronizing with GPS time

[Osiris400]

As the title says. The F-15E Manual says 

 

Quote

The default time loaded at CC (Central Computer) power up is the GPS time,

However at startup the computer clock will begin at the miz start time, not the actual time. 

You can see in the attached screenshot the actual time on the clock at the bottom, while the computer time (UFC) is about 1.5mins behind.

[Thorax_fin]

Bump this,

The INS clock will only start when the generator power is provided. It will also stop in the background if generator power is cutoff. I could not find a way to synchronize the INS-clock with the mission time. This is in particularly painful if flight of multiple elements try and plan for TimeOnTarget (TOT) missions, where all elements have different time based on when the engines were started up. All waypoint ETA calculations are based on the INS-time.

 

streagle ins_illustration.trk