[time-nuts] Dimension 4 and GPS time disagree, why?

Chris Wilson chris at chriswilson.tv
Tue Jun 12 11:28:15 UTC 2012



> I run Dimension 4 as a time standard on my POC's, mainly for using
> JT65 digital radio communications. It polls tick.usno.navy.mil for the
> time. I have noticed since getting my ThunderBolt set up that the GPS
> time is about 15 seconds in advance of my PC clock, despite a
> correction via Dimension 4 immediately before checking the difference.
> Why is that please? Thanks.

> -- 
>        Best Regards,
>                    Chris Wilson.
> ________________________________________

> Chris, you do know that GPS time and UTC are offset because of accumulated
> leap seconds?

>   http://tycho.usno.navy.mil/gpstt.html

> 73,
> David GM8ARV


12/06/2012 12:27

I do now! :) Thanks for that and the replies by e-mail. I have tried
setting the ThunderBolt to UTC and now the results agree perfectly.
Thanks David!

-- 
       Best Regards,
                   Chris Wilson.





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