[aprssig] gpsd and ntpd

Joe Bennett aprs at ka3nam.com
Fri Mar 15 07:58:39 CDT 2013


Yep, it can be done... Have a few NTP servers configured this way with 
PPS... Deffinately keeps the server more accurate than NTP alone... 
Getting date and time from GPS depends on the GPS used, as jitter can be 
quite high and hard for NTPd to correlate..



-Joe
KA3NAM




On 03/15/2013 05:53 AM, Jason KG4WSV wrote:
> As best I recall, NTP needs the PPS signal from the GPS.  I don't
> think this is compatible with gpsd.
>
> It doesn't really make sense that gpsd would make a good clock source;
> there's too much nondeterministic behavior in the network connection.
> The NTP protocol has some provisions for determining latency, etc, but
> gpsd doesn't.
>
> -Jason
> kg4wsv
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