Need trusted NTP Sources
Bryan Seitz
seitz at bsd-unix.net
Sat Feb 8 04:35:25 UTC 2014
On Fri, Feb 07, 2014 at 03:32:22PM -0500, Anthony Williams wrote:
>
> With a quick and easy mod, another option for $35 is a Sure Electronics
> GPS board.
>
> GPS: http://www.sureelectronics.net/goods.php?id=99
>
> Mod: http://www.satsignal.eu/ntp/Sure-GPS.htm
>
> -Alby
>
>
> On 2/7/2014 1:14 PM, Jared Mauch wrote:
> > Having a number of NTP servers will help you detect false tickers which may be critical.
> >
> > If you want something that is "cheap" as in you for your home, I can recommend this: ~$350 w/ antenna, etc..
The SureGPS is decent fun but i've had this device lose sync / crap out randomly as well.
I am using the Garmin 18X-LVC + a low power server with pretty good success.
(Requires PPS soldering + USB pigtail for power, pretty easy mod)
[seitz at ntp-gps ~]$ ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
clock.fmt.he.ne .CDMA. 1 u 53 64 377 76.692 0.976 0.291
time-a.timefreq .ACTS. 1 u 39 64 377 48.140 -0.896 0.348
time-b.timefreq .ACTS. 1 u 56 64 377 48.800 -0.986 0.430
time-b.nist.gov .ACTS. 1 u 48 64 377 7.333 3.630 0.562
oGPS_NMEA(1) .PPS. 0 l 4 16 377 0.000 0.002 0.000
* GPS is on a http://us.shuttle.com/barebone/Models/XS36VL.html - chosen for the dual external serial ports.
--
Bryan G. Seitz
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