Re: [gpsd-dev] PPS over USB

[Terje Mathisen]

Ed W wrote:
> On 06/05/2012 22:56, Terje Mathisen wrote:
> > BTW, I just picked up a NetGear 3800 for the BufferBloat firmware, I
> > intend to point that router at the local S1, which should result in
> > better timing than a PPS over USB solution.
>
>
> Big problem... If you look on the chrony mailing list you can find a
> post plotting the divergence of worldwide stratum 1 clocks. I'm afraid
> the answer is that stratum 1 is not a definition of accuracy, just an
> observation on the clock source. In particular many have fixed offsets,
> poor stability, synced to radio clocks rather than GPS, etc.

You misunderstood my post.:-(

The S1 is my personal, at-home, FreeBSD+Garmin18 ntpd server.

I also have backup Linux+SURE and FreeBSD+Oncore UT+ servers, as well as 
a bunch of PPS-capable bare GSP boards.

I.e. my local LAN has multiple ~us level reference servers.

I have been part of the ntp-hackers mailing list for 10-15 years, I used 
to host the widows binaries of the ntpd reference code.

Terje

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"almost all programming can be viewed as an exercise in caching"