[GPS_Standard] GPS Modules with 1PPS output

[Zack Widup]

Thanks Bert!

At $50 apiece, I guess it's worth getting one and experimenting with it. 
It might be a while before I do that, but I'll post the results here.

73, Zack W9SZ

On Sun, 27 Jan 2008, Bert, VE2ZAZ wrote:

> Hi Zach,
>
>> Are these units better for our purposes than a Jupiter 12 board?
> The instinctive answer would be yes. The Jupiter 12 board is a
> navigation-grade GPS and the Oncore UT+ is of timing grade. Timing-grade
> receivers "typically" deliver an accuracy one order of magnitude better than
> navigation-grade. BUT, it all depens on whether the system's overall
> accuracy and stability will be enhanced by a better GPS. I can tell you that
> to obtain a range of accuracy typically in the low 10^-10's, an
> automotive-grade GPS is fine on my system.
>
> I have not personally tried better-grade GPS receivers though. In the end,
> since we average out the GPS inaccuracies over a long period (hours), the
> benefit may not be so obvious on my system.  It might be beneficial,
> especially for shorter sampling periods. Worst case, you would not see much
> improvement. On better (commercial-grade, more complex, better designed)
> systems, it would definitely make a difference.
>
> In the end, everything counts. But your whole system has to be solid,
> including OCXO, thermal stability, DC supply stabilit, etc.
>
> Cheers,
>
> Bert, VE2ZAZ
>