An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The Time and Frequency Bulleting provides information on performance of time scales and a variety of broadcasts (and related information) to users of the NIST services.
Petty, E.
(2009),
NIST Time and Frequency Bulletin, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD
(Accessed June 7, 2023)