[time-nuts] Small time server for mobile use.

Chris Albertson albertson.chris at gmail.com
Sun May 31 05:50:17 EDT 2015


If you already have a bunch f PCs running NTP why add one more?  Just
run the PPS from your GS to one of the existing PCs Anklet t be a
stratum one.  It's zero cost.  For hold over "Orphan mode" works well
and will meet your 100 ms requirement.  Again, it is zero cost.

On Sat, May 30, 2015 at 3:53 AM, David J Taylor
<david-taylor at blueyonder.co.uk> wrote:
> Hi sorry for a possibly OT post.
> Has anyone had practical experience with small commercially available time
> servers / ntp servers suitable for mobile  use in a vehicle.
>
> The use case is I am in need of an accurate (ie.  within 100 ms) time source
> for several pc's in moving vehicle.    Being able to run directly off a 13.8
> or 28 VDC  source would be a major plus but AC power is also available.
>
> Hold over if there are gaps in GPS coverage is also a major plus.
>
> We already have a GPS with a 1 pps output, but an integrated box with it's
> own GPS would be best.
>
> Yes I am aware I could feed a 1 pps signal into a laptop and use that as a
> time server and I may end up going that route.
>
> There is a small Ethernet LAN in the vehicle.  The pc's currently get their
> time via a wireless connection to various NTP servers.   I need to be able
> to ensure accurate time on the PC's if there is no wireless coverage.
>
>
> This is for a one off project so piecing together various parts is an option
> but a single box COTS solution would be nice.  I've found a few candidates
> via web searches but would welcome any feed back.
>
> Thanks in advance
>
> Mark Spencer
> _______________________________________________
>
>
> Raspberry Pi perhaps?
>
>  http://www.satsignal.eu/ntp/Raspberry-Pi-quickstart.html
>
> Cheers,
> David
> --
> SatSignal Software - Quality software written to your requirements
> Web: http://www.satsignal.eu
> Email: david-taylor at blueyonder.co.uk
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-- 

Chris Albertson
Redondo Beach, California


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