[time-nuts] The GPS velocity of light versus neutrinos

Bob Camp lists at rtty.us
Mon Nov 21 20:15:42 EST 2011


You can have a surveyor come out and locate your gizmo to sub one inch accuracy for a lot less than a clock trip costs. A one meter ( or 3 ns) error would be pretty large these days. Both have been demonstrated / proven so often that they aren't really open to challenge.

The total error is a sum of lots of things. Location and time of day are the easy stuff...


On Nov 21, 2011, at 7:27 PM, Chris Albertson <albertson.chris at gmail.com> wrote:

> On Mon, Nov 21, 2011 at 4:08 PM, Alan Melia <alan.melia at btinternet.com> wrote:
>> You can't measure anything with out perturturbing it in some way, even
>> slightly....then there is the Uncertainly Principle ....if they measure the
>> speed how do they know where they were.
> OK, So assume an unlikely huge position uncertainly of one meter.    On top of
> that let's assume the surveyor got it wrong too and missed by a full
> meter.    Both of these added together can only account for about 10%
> of what they saw.   Light moves across one meter in about 3nS   You
> need to explain 60nS  If the result is because of uncertainty in the
> location then the we are talking about 20 meters of position error.
> -- 
> Chris Albertson
> Redondo Beach, California
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