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2. Radio clock - Wikipedia

   en.wikipedia.org/wiki/Radio_clock

   Radio clock. Not to be confused with clock radio, an alarm clock incorporating a broadcast radio receiver. A radio clock or radio-controlled clock (RCC), and often colloquially (and incorrectly [1]) referred to as an " atomic clock ", is a type of quartz clock or watch that is automatically synchronized to a time code transmitted by a radio ...

3. Atomic clock - Wikipedia

   en.wikipedia.org/wiki/Atomic_clock

   GPS Time (GPST) is a continuous time scale and theoretically accurate to about 14 nanoseconds. However, most receivers lose accuracy in the interpretation of the signals and are only accurate to 100 nanoseconds. GPST is related to but differs from TAI (International Atomic Time) and UTC (Coordinated Universal Time).

4. Quartz clock - Wikipedia

   en.wikipedia.org/wiki/Quartz_clock

   Quartz clocks and quartz watches are timepieces that use an electronic oscillator regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks and watches are at least an order of magnitude more accurate than mechanical clocks. Generally, some form of digital logic ...

5. Casio Wave Ceptor - Wikipedia

   en.wikipedia.org/wiki/Casio_Wave_Ceptor

   The Wave Ceptor series (stylized as WAVE CEPTOR or WaveCeptor) is a line of radio-controlled watches by Casio. Wave Ceptor watches synchronise with radio time signals broadcast by various government time services around the world. These signals transmit the time measured by atomic clocks accurate to one second in millions of years.

6. COROS Wearables Inc - Wikipedia

   en.wikipedia.org/wiki/COROS_Wearables_Inc

   COROS Wearables Inc. is a company specialising in performance sports wearables. [1] The company has a global set-up. Their main operations are located in Shenzhen, China, where they house their R&D, Manufacturing, and HRM teams. The company has a marketing team in the United States handling global branding, commercial partnerships, product ...

7. GPS disciplined oscillator - Wikipedia

   en.wikipedia.org/wiki/GPS_disciplined_oscillator

   A GPS disciplined oscillator unit with a GPS antenna input, 10 MHz and 1 pulse-per-second (PPS) outputs, and an RS-232 interface.. A GPS clock, or GPS disciplined oscillator (GPSDO), is a combination of a GPS receiver and a high-quality, stable oscillator such as a quartz or rubidium oscillator whose output is controlled to agree with the signals broadcast by GPS or other GNSS satellites.

8. Clock synchronization - Wikipedia

   en.wikipedia.org/wiki/Clock_synchronization

   Clock synchronization. Clock synchronization is a topic in computer science and engineering that aims to coordinate otherwise independent clocks. Even when initially set accurately, real clocks will differ after some amount of time due to clock drift, caused by clocks counting time at slightly different rates.

9. Marine chronometer - Wikipedia

   en.wikipedia.org/wiki/Marine_chronometer

   Chronometer circa 1844-1860. A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation. It is used to determine longitude by comparing Greenwich Mean Time (GMT), and the time at the current location found from observations of celestial bodies.