[time-nuts] Re: One-night experiment: empirically verifying that the west coast power grid is actually interconnected

[Hal Murray]

phk at phk.freebsd.dk said:
> If you want to see the real trouble, you need to GPS referenced high
> resolution phase measurements in two or more locations, and then plot the RMS
> of their differences. 

Suppose I get a time stamp on the first zero crossing of each second.

How accurate do they have to be to see the "real trouble"?

Is a constant offset a problem?  For example, if I have identical setups at 
different locations but one has a longer antenna cable.

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