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Comment by lutorm | Hacker News Reader

What they did not do (according to this paper) is account for the fact that in the satellite frame, during the neutrino's flight the receiver station was moving towards the source.

That can not possibly have an effect. The clocks are synchronized before the experiment. Once the synchronization is done, the satellite could be swallowed by a black hole and it would not affect the measurement.

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I believe the idea is that the clocks are synchronised in the frame of the satellite. Due to the relativity of simultaneity, it doesn't make sense to talk about the clocks being synchronised in an absolute sense.

Even if the satellite is swallowed by a black hole, that measurement frame still exists as an abstract concept.

I believe you're right, that's basically what this paper suggests.

Unfortunately I don't think it matches up with what CERN did in reality, which is synchronize clocks in the ground frame.

Is there even a single "ground frame" here? The two laboratories are in relative motion.

What you say is true, but that motion is small compared to the motion of the satellites in relation to either of the ground stations.

Oh, I think I misunderstood the statement. They original quote must mean receiver and source of neutrinos. Somehow I read it as being the GPS source and receiver, in which case it doesn't make sense.

What is synchronization? http://galileo.phys.virginia.edu/classes/109N/lectures/synch... Your sense of time ia very different from what relativity predicts.

Synchronization is ensuring that two events are simultaneous, which most definitely can be done. Relativity just says that you have to be careful to note in which frame the events are simultaneous.

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