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frnkng | 2 years ago

The grid in Europe is so stable that you can literally use it to synchronise a clock by counting the oscillations.

Error over time: 0

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mrob|2 years ago

Total frequency error over time is not a good measure of stability because the frequency is actively adjusted to control this. The grid could fail every day and still have 0 frequency error over time if they ran it faster when it was working to compensate.