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

[Bob Darlington]

What's your budget?  I've done this with 1U sized NTP servers from
Symmetricom (S300 and S350 systems) for mobile military use.  These are a
few thousand bucks a pop.  They're rugged, and held up just fine in places
the military goes.Compared to the rest of the system I was working on, this
was quite small in comparison and we used more than one at each location.
My personal one died recently so I'm working on developing a cape for the
BeagleBone Black.  The prototype is working just fine so far so I'm moving
forward with a board layout and eventual sale to the list members if there
is any interest (I'm not asking for interest yet).

-Bob

On Tue, May 12, 2015 at 11:11 AM, Mark Spencer <mark at alignedsolutions.com>
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
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