[ntp:questions] Strange jumps in PPM

mike cook michael.cook at sfr.fr
Wed Aug 21 06:53:32 UTC 2013


Le 21 août 2013 à 08:33, mike cook a écrit :

> 
> Le 21 août 2013 à 08:03, A C a écrit :
> 
>> Ok, so I saw the below event in the loops on my system which is controled by ATOM, SHM, and several internet servers.
>> 
>> I suspect it has to do with the GPS PPS output glitching during extreme satellite events (bad constellation arrangement, fringe signal, etc.)
>> 
>> Is there a way to have ntpd ignore the PPS quickly if it spins out of control?  The system recovers fairly quickly and the clock doesn't go too far out but it would be nice to avoid these jumps.
>> 
> 

  I realize now that I didn't respond to the question :-( .  AFIK there are no knobs available to do this. It would be nice to be able to specify maximum acceptable offset or jitter by clock. 

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