[time-nuts] Time Dilation tinkering

Michael Wouters michaeljwouters at gmail.com
Wed Mar 22 03:04:37 EDT 2017

Dear Chris,

I believe IATA prohibits the carriage of any quantity of rubidium on
passenger aircraft.
You have to complete a "Dangerous Goods Declaration" and it then has
to go by cargo aircraft.


On Wed, Mar 22, 2017 at 1:12 PM, Chris Albertson
<albertson.chris at gmail.com> wrote:
> "flight" there is the word.    Why drive up a mountain?   Take the clock
> with you inside the pressurized cabin of a commercial airliner next time
> you are on one of those 10 hour trans=pacific flights.   You be taller then
> any mountain and it is actually cheaper then a weather balloon.
> Can you get a Rb clock past the TSA x-ray machine.   Maybe if you ask
> first.  There must be a way to hand cary specialized equipment.
> On Tue, Mar 21, 2017 at 7:03 PM, Tom Van Baak <tvb at leapsecond.com> wrote:
>> But attached is one of the first plots where I put a SA.32m in a home-brew
>> vacuum chamber and pulled down to a few inches of Hg for a few hours to
>> simulate the low pressure of a flight up to 50 or 90,000 ft. For a high
>> altitude relativity experiment -- where you'd like your clock to remain
>> stable to parts in e-13 and not accumulate too many stray ns -- it's not a
>> good sign when your clock changes by 2e-11 (that's more than 1 ns per
>> minute) just because of ambient pressure changes.
> --
> Chris Albertson
> Redondo Beach, California
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