Articles Topic




    Atomic clocks and ntp servers


    Added: 08-06-2004
    Author: Richard N Williams
    Category: GPS     		← Back | ↓ Related | Home →


    Hours in conventional electronic and electrical current ran through the oscillator which provides electrical signals repeatedly, the government put precision Quartz crystals. Crystal oscillator is much more accurate than the mechanical clock, but still used, perhaps more than the second week.

    For day to day use the crystal oscillator is a good way to track time; in the race every day of our lives, making the slight differences, but, like light or radio waves can travel at 300,000 miles per second, some as high tech as a satellite navigation or global communication, requires much more accurate as possible.

    Atomic clock is a timekeeping device that uses known atomic resonance frequency of the particle to keep time. True true first atomic clock was built in 1955 at the National Laboratory in the UK and the physical is the basis -133 oscillating particles Caesi in particular 9,192,631,770 per second.

    This is true over the oscillation signal from the microwave radiation emitted by the particles when the energy of electronic exchange. Many of the atomic clock is designed to form a government the right to increase the resulting oscillations.

    While other atoms can be used in the oscillation (9,192,631,770 Second) of -133 particles Caesi now accepted and the International System of Units (SI) as one of the second definition.

    Atomic clock and generally large with lots of technical protection, such Vacuums and the entire team of scientists need to maintain and monitor the clock. Many who goeth to the frequency of unwanted biverkningar other cover in an atomic clock and even the gravitational dilation (which according to Einstein's theory of time in different heights to walk because of differences in the gravitational field) of this atomic clock makes expensive.

    Fortunately, many large national physical laboratory for sending a radio signal to atomic clock that can be used for standard crystal oscillators to synchronize.

    Atomic clock is also the basic GPS (Global Positioning System) satellites, because each has an atomic clock for accurate time is essential for positioning (any space consists of the direction, velocity and time).

    GPS signals can also be used to capture the signal. Now this is a common means of computer networks to restore the right time is also important in communication with many applications.
    Many computer network using the NTP server (Network Time Protocol) for their equipment to Atomic synchonise time of GPS signals received through the network.

    A universal time scale, UTC (Coordinated Universal Time), has been developed based on the time and notify the Atomic Clock, eagle (International Atomic Time). UTC explain the reduction of Earth's rotation adds he jumped to the second Eagle to prevent a gradual drift night to day (although that would take 40.000 years or more) and allows the world to communicate using the same timescale.



    Link to this article:


    Several related publications



    ← BACK | ↑ TOP