[time-nuts] Re: What everyday uses are there for accurate clocks?

[Demetrios Matsakis]

At least when I did VLBI for geodesy, we used GPS to do the initial rough synchronization so we could get fringes.  After that the offset between the local masers is part of the solution.  You needed masers, though that could be considered syntonization rather has synchronization.  And since Earth rotation is defined in terms of atomic time, you obviously need a tie to UTC.

> On Nov 29, 2022, at 6:04 AM, RONALD SMITH via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> 
> Synchronisation of ALL telecom systems using TDM.
> 
> Maybe synchronisation of VLBI radio-astronomy systems too, keeping outputs of radio-telescopes on opposite sides of the planet in step. That's not my field, only a guess.
> 
> 73,
> Ron, G3SVW
> 11:04 UTC
> 
> ------ Original Message ------
> From: "Dr. David Kirkby via time-nuts" <time-nuts at lists.febo.com>
> To: "time-nuts at lists.febo.com" <time-nuts at lists.febo.com>
> Cc: "Dr. David Kirkby" <drkirkby at kirkbymicrowave.co.uk>
> Sent: Tuesday, 29 Nov, 22 At 02:45
> Subject: [time-nuts] What everyday uses are there for accurate clocks?
> I mentioned to someone the other day that I owned an HP GPS time and
> frequency standard. He asked me a simple question, but one I didn’t know
> the answer to.
> 
> Apart from GPS, what in the daily lives of the general public need the sort
> of accuracy one can get from time-nut grade clocks? I believe some
> financial transactions is one application, and the cellular phone system
> another. Are there others?
> I found a few links
> “The importance of time measurement”
> https://www.nsai.ie/national-metrology/calibration-services/time-and-frequency-calibration/the-importance-of-time-measurement/ <https://www.nsai.ie/national-metrology/calibration-services/time-and-frequency-calibration/the-importance-of-time-measurement/>
> 
> “The importance of measuring time”
> https://www.cranfield.ac.uk/alumni/communications/alumni-news/2021/0108-the-importance-of-measuring-time <https://www.cranfield.ac.uk/alumni/communications/alumni-news/2021/0108-the-importance-of-measuring-time>
> but have not seen any reference to anything much on the topic.
> -- 
> Dr. David Kirkby,
> Kirkby Microwave Ltd,
> drkirkby at kirkbymicrowave.co.uk
> https://www.kirkbymicrowave.co.uk/ <https://www.kirkbymicrowave.co.uk/>
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