[ntp:questions] Adjusting PPS offset

unruh unruh at wormhole.physics.ubc.ca
Sun Sep 4 05:21:33 UTC 2011

On 2011-09-03, A C <agcarver+ntp at acarver.net> wrote:
> I'm still digging through code for PPS and NMEA plus the routines in the 
> OS so that part is going to take a long time for me to figure out.  So 
> for now I'm just going to stick with PPS only and the pool servers.  As 
> for PPS itself, what is the proper (or at least most reasonable way) to 
> adjust the time1 offset so that PPS agrees with the tick of UTC?

And how would you decide what that offset was? Since the PPS is almost
certainly the most accurate time you have already.
(actually it is off by about 1us due to the interrupt handling.)

> I'm sure there's a slight offset, probably not much worth worrying about 
> in reality but I'm just curious about how it would be removed if I 
> wanted to do so.

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