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Submission + - Main frequency irregularities confuse European clocks

elgatozorbas writes: This short notification by the European network of transmission system operators for electricity stirred a lot of attention. Apparently the European power grid frequency has been off since mid-January, causing some clocks to run behind by 5 minutes. How common are these mains-frequency synchronized clocks anyway, and wy are they built that way?

Submission + - Galileo satellites experiencing multiple clock failures (bbc.com)

elgatozorbas writes: According to a BBC article, the onboard atomic clocks that drive the satellite-navigation signals on Europe's Galileo network have been failing at an alarming rate.

Across the 18 satellites now in orbit, nine clocks have stopped operating. Three are traditional rubidium devices; six are the more precise hydrogen maser instruments that were designed to give Galileo superior performance to the American GPS network.

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