The gps system is based on atomic clock technology.
Gps based wall clock.
The clocks have a unique feature whereby they use gps satellite signals to automatically configure themselves.
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The gps system operates continuously round the clock of the year.
There will be one time in all the gps based clocks synchronized with the satellite time source.
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Each gps satellite has multiple atomic clocks synchronized to a ground based master clock.
The gps constellation consists of 24 orbiting satellites with each one containing a highly stable atomic cesium clock which is continuously monitored and corrected by the gps control segment.
Sharp atomic analog wall clock 12 silver brushed finish sets automatically battery operated easy to read easy to use.
Consistent time display even after power failures.
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Once set the clocks never requires manual time adjustments.
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Indicator led to indicate receipt of gps time signal from the satellite.
It takes time to read the gps data.
Periodically the microcontroller s time is reset according to the gps information.
Global positioning system gps based auto synchronous clocks have atomic clock accuracy without the need to ever program or set them.
However clocks are often designed for low cost rather than for keeping accurate time.
Consequently the gps constellation can be considered a set of 24 orbiting gps clocks with worldwide 24 hour coverage.
Advantages of gps based digital clocks.
Why simple gps based clocks may be inaccurate in my original clock the microcontroller reads ascii data from the gps module and decodes the time information from that data.
Dedicated timing receivers can serve as local time standards with a precision better than 50 ns.
This particular clock uses 6 of the 1 alphanumeric displays with controllers to create a 6 character display.
There are 24 operational gps satellites orbiting the earth all are transmitting time signals.
Gps galileo and glonass satellite navigation systems have one or more caesium rubidium or hydrogen maser atomic clocks on each satellite referenced to a clock or clocks on the ground.
Gps time transfer accuracy is within 40 nanoseconds of utc.
The gps clock provides everyone on earth with access to atomic time standards without needing a local atomic clock.