[time-nuts] ublox NEO-M8T improved by insulated chamber?

Attila Kinali attila at kinali.ch
Sun Nov 12 10:36:54 EST 2017

On Tue, 7 Nov 2017 22:07:43 +0000
Leo Bodnar <leo at leobodnar.com> wrote:

> Coincidentally, I have been testing relative phase difference of two GPS clocks http://www.leobodnar.com/shop/index.php?main_page=product_info&cPath=107&products_id=301 since Friday. 
> They are completely independent, including separate antennas and positioned a few yards away from each other so ionospheric disturbances would affect both units equally.  Devices use Ublox chipset.
> Average phase difference did not change in four days since Friday but there is phase wander within around 10ns.
> Here is a video of 4 hours worth of data.  One horizontal division is 20ns:
> http://leobodnar.com/balloons/NTP/twoGPSclocks.mp4

Do you have this measurement with proper time-differences?
Ie like using a simple and cheap counter? That would be quite
a bit more interesting than a video of an osciloscope screen.

			Attila kinali

You know, the very powerful and the very stupid have one thing in common.
They don't alters their views to fit the facts, they alter the facts to
fit the views, which can be uncomfortable if you happen to be one of the
facts that needs altering.  -- The Doctor

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