> Within a given power distribution grid, several observers as widely separated > geographically as possible, time stamp the first two zero crossings of the > power line after each UTC second over the course of 24 hours (86,400 pairs > of data).
Life is more complicated than that. There is a race condition when a zero crossing happens close to the second tick. Did it happen before or after? You might be able to dance around that by taking 3 samples if the first one is closer than X ms to the second tick and sort it out with post processing. I think your data stations will need to be located close enough together. You probably also have an issue with 3 phase. Are you measuring stations all on the same phase? There is another factor of 2 from flipping the output leads of the transformer or plugging into the other side of the 110/220. -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
