Re: [gpsd-users] Help with extracting time information from GPS to NTPD

[Eric S. Raymond]

Two Sank <address@hidden>:
> Do readers of this forum not think that there should be a standard response 
> to people hoping to use GPSD with NTPD.
> It comes up fairly frequently. It seems to follow the same route i.e.
> 
> someone tries to help make the link between the daemons.
> the requestor manages to get the two daemons associated (sometimes with no 
> other time server)
> it fails to synchronise their PC clock
> then someone points out that USB linked gps are not appropriate because the 
> time at best is accurate only to one
>     second with lots of jitter, and that a real serial line with pps is 
> necessary
> then someone points out that a single source is not what ntpd is looking for
> then someone suggests Chrony as an alternative
> then the user discovers some erratic behaviour in terms of reporting time 
> from their gps
> etc. etc.
> 
> The problem is that I don't know enough to give the best advice but the 
> question does cause quite a lot of traffic and
> the tests wastes a lot of the requestors time.
> 
> I know that searching the archives could turn up a lot of this stuff, but 
> perhaps a standard summary might help.

We have a FAQ page on the website.  Maybe one of the time-service exprts could
write an entry for it.
-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>