UK: Maintaining the correct time is no longer just a matter of keeping your watch wound — especially when it comes to computers, telecommunications, and other complex systems. The clocks in these devices must stay accurate to within nanoseconds because their oscillators are synchronised to agree with the clocks onboard Global Positioning System (GPS) satellites.
In the journal Review of Scientific Instruments, researchers report on a new way to accurately synchronise clocks. The new method uses both GPS and the Internet to set clocks within 10 nanoseconds of a reference clock located anywhere on Earth.
The method makes use of a common-view disciplined oscillator (CVDO) — a device whose frequency and time are tightly controlled to agree with a reference clock at another location – if both clocks are connected to the Internet and if both clocks are being compared to GPS satellites.
Source: The Hindu