Atomic clocks are accurate timekeeping devices developed by man. Modern atomic clocks are so accurate that, also lost 100 million years, less than one second of time would be gone.

This accuracy makes it ideal reference for an NTP (Network Time Protocol). NTP is a protocol, just to synchronize computer networks on the Internet by Local Area Network (LAN).

This article describes how to synchronize a computer network to an atomic clock with NTP> Source.

Atomic clocks are so accurate that a general term has been developed called UTC (Universal Time Coordinated), which is based on the time told by atomic clocks. UTC is used throughout the world and is the same everywhere so that the networks of different computers to be synchronized at the same time.

Unfortunately, atomic clocks are extremely expensive, extremely delicate and rather bulky equipment so that they are really just large-scale physics laboratories or arehighly technical equipment such as satellites.

Fortunately, NTP can synchronize your server time to UTC with an atomic clock as the source of the two gives us time national transmission frequency or GPS (Global Positioning System) network.

Many national physics laboratories such as NPL in the United Kingdom, Germany NPL and NIST in the United States broadcast time UTC, a reference to long-wave radio transmission. These signals can beincreased from an NTP server with a radio receiver. Unfortunately, radio transmissions are not transmitted from all countries, and the signal is over.

Fortunately, the constellation of satellites that make up the GPS network in the United States all have an atomic clock on board. This signal is used by satellite navigation receivers, used to work out of position, but also from an NTP server as a source of GPS timing.

Whether with a radio or GPS reference NTP serverTime Synchronization Server will be available within a few milliseconds of UTC.

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