Do you mean presice point positioning (PPP) ? which is somewhat different from PPK.
I never got that accurate result as stated (sub desimeter) with PPP. It always seems of by 1-1,5m from the origin with IGN and using RTKlib 2.4.2, which is the only version that process right and gives you Q6. Not sure if its because of the missing L2 or what.
So i would focus on PPK that do works.
Also check out this thread about points and processing
Time stamp and/or events is used for adding coordinates to your images via a hotshoe signals. Either trigger hotshoe with reachview or create a puls otherwice that again creates a event and is saved with time and coordinates.
More about it here
And that last link should give you answer to you last questions.
