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Standard frequency and time signal service (short: SFTS) is, according to Article 1.53 of the International Telecommunication Union's (ITU) Radio Regulations (RR), [1] "A radiocommunication service for scientific, technical and other purposes, providing the transmission of specified frequencies, time signals, or both, of stated high precision, intended for general reception".
NIST time and frequency bulletin, no. 551: Author: Petty, Eyvon M. Software used: Digitized by the Internet Archive: Conversion program: Recoded by LuraDocument PDF v2.65: Encrypted: no: Page size: 601 x 767 pts; 599 x 771 pts; 601 x 766 pts; 601 x 774 pts; 597 x 766 pts; 600 x 782 pts; 598 x 768 pts; 596 x 775 pts; Version of PDF format: 1.5
NIST-F1. NIST-F1 is a cesium fountain clock, a type of atomic clock, in the National Institute of Standards and Technology (NIST) in Boulder, Colorado, and serves as the United States' primary time and frequency standard. The clock took less than four years to test and build, and was developed by Steve Jefferts and Dawn Meekhof of the Time and ...
NIST time and frequency bulletin, no.518: Author: Bennett, Gwen E. Software used: Digitized by the Internet Archive: Conversion program: Recoded by LuraDocument PDF v2.65: Encrypted: no: Page size: 586 x 771 pts; 586 x 769 pts; 583 x 766 pts; 586 x 781 pts; 595 x 766 pts; 604 x 769 pts; 605 x 766 pts; 585 x 775 pts; Version of PDF format: 1.5
List of tz database time zones. The tz database partitions the world into regions where local clocks all show the same time. This map was made by combining version 2023d with OpenStreetMap data, using open source software. [1] This is a list of time zones from release 2024b of the tz database. [2]
NIST physicists Steve Jefferts (foreground) and Tom Heavner with the NIST-F2 cesium fountain atomic clock, a civilian time standard for the United States. NIST-F2 is a caesium fountain atomic clock that, along with NIST-F1, serves as the United States ' primary time and frequency standard. [1] NIST-F2 was brought online on 3 April 2014. [1][2]
NIST time and frequency bulletin, no. 549: Author: Petty, Eyvon M. Software used: Digitized by the Internet Archive: Conversion program: Recoded by LuraDocument PDF v2.65: Encrypted: no: Page size: 581 x 767 pts; 581 x 770 pts; 581 x 779 pts; 588 x 766 pts; 581 x 781 pts; 585 x 767 pts; 591 x 780 pts; Version of PDF format: 1.5
NIST time and frequency bulletin, no. 542: Author: Petty, Eyvon M. Software used: Digitized by the Internet Archive: Conversion program: Recoded by LuraDocument PDF v2.65: Encrypted: no: Page size: 411 x 539 pts; 417 x 548 pts; 414 x 535 pts; 414 x 534 pts; 416 x 535 pts; 412 x 546 pts; 417 x 535 pts; 410 x 547 pts; Version of PDF format: 1.5