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1. www.time.govNational Institute of Standards and Technology | NIST

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   Arizona Mountain. Standard Time. MST (UTC-7) 12:28:44 P.M. 24-Hour Clock Display. UTC is always displayed as a 24-hour clock. NIST promotes U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve our quality of life.

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     So the running clock comes from the internal oscillator of...

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     The National Institute of Standards and Technology - Time...

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2. time.is › United_StatesTime in United States now

   time.is › United_States

   Vor 4 Tagen · Time.is displays exact, official atomic clock time for any time zone (more than 7 million locations) in 57 languages.

3. www.timeanddate.com › time › international-atomic-timeInternational Atomic Time (TAI) - timeanddate.com

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   • Tai Keeps The Pace
   • How Is Tai Measured?
   • Why Use UTC – Not Tai?

   Two components are used to determine Coordinated Universal Time (UTC): 1. International Atomic Time (TAI)is a time scale that uses the combined output of some 400 highly precise atomic clocks. It provides the exact speed at which our clocks tick. 2. Universal Time (UT1), also known as astronomical time, refers to the Earth's rotation. It is used to...

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   International Atomic Time is an extraordinarily precise means of time-keeping. Atomic clocksdeviate only 1 second in up to 100 million years. The secret to this impeccable precision is the correct measurement of the second as the base unit of modern time-keeping. The International System of Units (SI) defines one second as the time it takes a Cesiu...

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   The high level of precision achieved by using atomic clocks is both a blessing and a curse. On the one hand, accurate time-keeping is a necessity, for example for time-sensitive technology, such as modern air traffic control systems that rely on satellite navigation. On the other hand, TAI does not take into account the variations in Earth's rotati...

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4. www.nist.gov › time-frequencyTime & frequency | NIST - National Institute of Standards and...

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   NIST, in coordination with the U.S. Naval Observatory, provides official time for the United States. NIST builds and operates the country’s most accurate atomic clocks, which help set the global time scale known as Coordinated Universal Time.

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6. time.gov › webNIST TIME

   time.gov › web

   Official UTC(NIST) Time. connecting. Time Zone Information

7. time.nist.govtime.nist.gov

   time.nist.gov

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8. www.nasa.gov › what-is-an-atomic-clockWhat Is an Atomic Clock? - NASA

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   19. Juni 2019 · Developed by NASA’s Jet Propulsion Laboratory in Pasadena, California, the Deep Space Atomic Clock is a serious upgrade to the satellite-based atomic clocks that, for example, enable the GPS on your phone. Ultimately, this new technology could make spacecraft navigation to distant locations like Mars more autonomous.