[time-nuts] Question re neutrinos and GPS

[Magnus Danielson]

On 01/07/2012 12:37 AM, bg at lysator.liu.se wrote:
> Hi Antonio,
>
>> "The GPS is very unlikely to give an accurate speed for anything near the
>> speed of light - for there are many known effects not taken into account
>> by the GPS protocol.
>> In the end the OPERA experiment may alert people to the assumptions and
>> approximations implicit in the GPS."
>>
>> This wrongfooted me. So please, does the above quoted statement have any
>> meaning for time-nuts? Don't answer "ask the author of the statement"
>> please, I
>> would like to hear the opinion of time-nuts.
>
> In what way is GPS measuring the speed of the neutrions directly? It is
> not that you have a GPS receiver riding the neutrions from the starting
> site to the finish site... ;-)
>
> The GPS receivers are syncing the reference clocks at both the sites. GPS
> can be used for time/freq transfer, and is a well established tool for
> that.
>
> I fail to see the meaning of the quoted statement.

It would be quite a fabulous GPS receiver, made up entirely of 
neutrinos, which would be physically meaningless since the neutrinos 
does not couple to the GPS signal's photons... especially when being 
underground throughout the full stretch of the experiment.

Producing even minuscule amounts of neutrinos takes up quite a lot of 
energy, to say the least.

Cheers,
Magnus