National Institute of Standards and Technology | NIST
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.
Time.is - exact time, any time zone
3 天之前 · Time.is displays exact, official atomic clock time for any time zone (more than 7 million locations) in 58 languages.
Current International Atomic Time, Time Standard (TAI) - timeanddate.com
1 天前 · Current local time in International Atomic Time. See a clock with the accurate time and find out where it is observed. Also includes offset from UTC / GMT, geographic coordinates, and alternative names.
Time & frequency | NIST - National Institute of Standards and …
NIST builds and operates the country’s most accurate atomic clocks, which help set the global time scale known as Coordinated Universal Time. Through its own time scale, NIST provides time to the nation and the world via the internet and radio. NIST develops chip-scale atomic clocks and calibrates clocks for customers such as stock exchanges.
What Is International Atomic Time (TAI)? - timeanddate.com
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. Universal Time (UT1), also known as astronomical time, refers to the Earth's rotation. It is used to compare the pace provided by TAI with the actual length of a day on Earth.
International Atomic Time - Wikipedia
International Atomic Time (abbreviated TAI, from its French name temps atomique international [1]) is a high-precision atomic coordinate time standard based on the notional passage of proper time on Earth's geoid. [2] TAI is a weighted average of the time kept by over 450 atomic clocks in over 80 national laboratories worldwide. [3]
NIST TIME
Official UTC(NIST) Time. connecting. Time Zone Information
原子鐘 - 维基百科，自由的百科全书
原子鐘（英語： Atomic clock ）是一種時鐘，它以原子共振頻率標準來計算及保持時間的準確。 原子鐘是世界上已知最準確的 時間測量 和 頻率標準 ，也是國際 時間和頻率轉換 的 基準 ，用來控制 電視 廣播和 全球定位系統 衛星的訊號。
Atomic Clocks | NIST
Atomic clocks have revolutionized how we tell time. These astoundingly accurate devices touch the lives of every person on Earth and keep us in sync no matter where we are. They make possible world-changing technologies such as GPS and help scientists explore some of the universe’s deepest mysteries.
Atomic Clock/Current Time - Hashemian
2011年12月24日 · Current Date/Time: Wednesday 11th of December 2024 10:53:02 AM (Hours offset from UTC/GMT: