"A billionth of a second equals a nanosecond, a time interval far beyond our own human capacity of appreciation," explains Marco Falcone, ESA's Galileo System Manager.
"A single lightning flash across the sky during a thunderstorm lasts about ten milliseconds, which is already 10 000 000 nanoseconds. But for high-tech applications, as well as navigation services, nanosecond accuracy is essential."
The replacement for Greenwich Mean Time, UTC
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