talking computer clock
The development of atomic clocks throughout the twentieth century has been instrumental in many of the technologies we use every day. But many of the atomic clocks century innovations of the twentieth century would not exist.
Satellite communications, global positioning, computer networks and even the Internet would not be capable of functioning in the way they used to if wasn t ™ € for atomic clocks and ultra-precision in timekeeping.
Atomic clocks are incredibly accurate timers can not lose one second in millions of years. Compared with digital clocks can lose one second every week and mechanical watches requires closer lose even more time.
The reason for an atomic clock € ™ s incredible accuracy is based on an oscillation of a single atom. A swing is just a vibration in a particular energy level in the case of most atomic clocks based on MRI cesium atom oscillates exactly 9192631770 times a second.
Many technologies are currently based on atomic clocks for their accuracy rampant. The system global nomination is a great example. The GPS satellites have an atomic clock on board and it is this time that used to work out of position. Since the satellites GPS communicate using radio waves travel at the speed of light small inaccuracies (180,000 miles per second in vacuum), in time could make the position wrong by hundreds of miles.
Another application that requires the use of atomic clocks in computer networks. When computers communicate with worldwide it is imperative that all use the same timing source. If I didnâ t ™ €, time sensitive transactions such as shopping Internet, online reservations, the stock market and even sending an email would be almost impossible. The emails that arrive before and sent the same article in an Internet shopping site could be sold to more than one person.
For this reason a global calendar called UTC (Coordinated Universal Time), said time-based atomic clocks has been developed. UTC is delivered to computer networks through server times. Most servers time using NTP (Network Time Protocol) to distribute and synchronize the networks.
NTP time servers can receive UTC time from a number of sources common and the atomic clocks aboard the GPS system can be used as a source of UTC time by a server connected to a GPS antenna.
Another method is quite used by NTP time servers is to use the radio wave transmission through several long countriesâ € ™ laboratories. Although National Physical not available everywhere and very susceptible to local topography emissions provide a secure method of receiving the synchronization source.
If none of these methods is available, then a UTC time source can be received via the Internet, although the accuracy and security are not guaranteed.
About the Author:
Richard N Williams is a technical author and specialist in atomic clocks, telecommunications, NTP and network time synchronisation helping to develop dedicated NTP clocks. Please visit us for more information about a network time server or other ntp server solutions.
Article Source: ArticlesBase.com – Accuracy in Timekeeping – Atomic Clocks and Time Servers
The Speaking Clock pt 2
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