[time-nuts] Next Generation Time/Frequency Standards May Require Provisions Preventing Vertical Displacement
w3kl at w3kl.com
Wed Sep 29 17:17:16 UTC 2010
More importantly, does this impose an upper limit on data transport speed over
networks, in particular wireless networks? If and when one produces the network
technology that would demand the accuracy and precision of these new
standards, if one object is moving relative to the other, there could be loss of
data as the moving clock goes out of sync with the stationary one. We know this
was possible just from special relativity, but motion at "normal" speeds does
not contribute appreciably at the currently achievable accuracies and
precisions. However, with the next generation, driving in a car or certainly
flying in a plane will limit bandwidth. And, of course there's the gravitation
effect to contend with in the future as well, which could also limit bandwidth.
As I am thinking about this, does this impose a limit on GPS accuracy and
precision based on the next gen technology?
Jeffrey K. Okamitsu, PhD, MBA
+1-609-638-5402 US Mobile Phone
+1-240-421-0692 GSM Mobile Phone
From: Pieter ten Pierick <time-nuts-mail at tenpierick.com>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Wed, September 29, 2010 12:55:59 PM
Subject: Re: [time-nuts] Next Generation Time/Frequency Standards May Require
Provisions Preventing Vertical Displacement
> See the following:
> Of course, we're probably a few years away from seeing commercially
> instruments with the required precision/accuracy...but it will come.
I read that the moving of NIST F1 1 floor indeed changed the frequency
quite a bit.
(The change in altitude was 11.5 feet)
That article also mentioned that the warming up of the building itself in
summer has an effect on some of the newest research clocks, because the
environment changes shape...
(Not that those clocks are commercially available, though :-/ )
> Jeffrey K. Okamitsu, PhD, MBA
> +1-609-638-5402 US Mobile Phone
> +1-240-421-0692 GSM Mobile Phone
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