[time-nuts] GENIUS by Stephen Hawking (PBS TV),

Tom Van Baak tvb at LeapSecond.com
Sun May 22 00:07:23 UTC 2016


> Tom 
> Impressive. Nice job.
> 
> How would one go about to prove beyond a doubt in that experiment that 18ns
> of phase shift in 24 hrs was truly caused by freq offset due to Relativity
> and not by some other combination of environment and handling issues

Hi Warren,

I've given a lot thought on how to perform these clock experiments with precision and redundancy, and also how to report the results in a way that is educational and convincing. I don't know if one can ever "prove beyond doubt" since the second half of that equation belongs to another person. But one can go a long way to plan everything before and during an experiment to address the first half of the equation, the part you do control.

In the ten years since I did the original Mt Rainier experiment I've gotten a lot of email from people seeking clarification and I think I've covered the bases pretty well. But one thing I always wanted to do was a repeat trip just to make sure it wasn't dumb luck the first time. Maybe a different method, maybe without kids, maybe a different mountain. And the PBS / Hawking invitation was the perfect excuse to fulfill that goal.

The recent posting by Wulf about 5065A environmental sensitivities is a nice example of analyzing sources of instability, and double checking assumptions, etc.

You asked specifically how would one go about to prove -- and I can help there. In the next posting I will answer your query with this detail:

1) The design, specs, reputation, and experience of 5071A clocks world-wide.
2) The measured performance of my own particular set of 5071A.
3) Independent corroboration using alternate time transfer methods.
4) Supporting evidence by relativity experiments, both similar and different.
5) Probability of accidental success.

/tvb


----- Original Message ----- 
From: "ws at Yahoo via time-nuts" <time-nuts at febo.com>
To: <time-nuts at febo.com>
Sent: Saturday, May 21, 2016 8:37 AM
Subject: Re: [time-nuts] GENIUS by Stephen Hawking (PBS TV),


> Tom 
> Impressive. Nice job.
> 
> How would one go about to prove beyond a doubt in that experiment that 18ns
> of phase shift in 24 hrs was truly caused by freq offset due to Relativity
> and not by some other combination of environment and handling issues that
> effected phase &/or freq once the identical clocks where separated and
> operating at different temperatures, pressures, elevations, vibration, tilt
> angles, power supply voltages, airflow, cosmic rays, ozone, or some other
> unmeasured things that may be effecting the results?
> 
> To increase  *gravity* a lot more than a 7,000 ft altitude change, and
> without changing the environment variables, could one set of the CS clocks
> be put on a centrifuge, such as a fast spinning merry-go-round at a local
> park?
> 
> Anyone know what the 2G turn over effect, TC, etc, is of portable CS
> standards? Ideally they should all be zero, but probable aren't.
> 
> ws 
> 
> 
> 
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