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

Jim Lux jimlux at earthlink.net
Mon Nov 21 22:57:43 EST 2011


On 11/21/11 5:15 PM, Bob Camp wrote:
> Hi
>
> 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...

>> 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.



in the first paper, the distance uncertainty was given as 20cm




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