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A comment on Open-sourcing a more precise time appliance. Parent comment

Re:Open-sourcing a more precise time appliance by willis936 on Wednesday August 11, 2021 @08:52AM (#28141399)
Phase-locked loops[0] are not magic ;)

Also I imagine they are using a bog standard Kalman filter[1].

0. https://en.wikipedia.org/wiki/Phase-locked_loop

1. https://en.wikipedia.org/wiki/Kalman_filter

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Re:Open-sourcing a more precise time appliance by Unklejoe on Wednesday August 11, 2021 @10:45AM (#28142627)
I've implemented this (using GPS PPS to discipline a clock) using regular old PI control loops. I just make the loop damped enough to filter out the GPS PPS jitter and you're good.
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