Re: Time and Timing Servers

["Eric S. Raymond" <esr () thyrsus com>]

James R Cutler <james.cutler () consultant com>:
> My experience with Dave Mills NTP algorithm is that, giving sufficient diversity in higher stratum sources, GPS 
> versus Internet sources makes no practical difference. This assumes that you are concerned with Time for event 
> logging and scheduling and not concerned with frequency and phase for clocking data on TDM instances.
>
> If you are worrying about backhoe fade — it’s consequences will most likely affect other things more strongly than 
> Time differences.

I'm a subject-matter expert in Internet time service (tech lead of NTPsec) and I concur.

Local GPS sources are nice to have and fun to play with but not essential unless you
have a mission requitement to run autonomous.

Note by the way that you *can* run completely autonomous with NTPsec,
but not with the NTF version. 

https://blog.ntpsec.org/2017/08/30/achieving-autonomy.html
-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>