Skip to main content
U.S. flag

An official website of the United States government

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.

Time and frequency users manual:



George Kamas, George Kamas, Sandra L Howe
- NIST SP 559r1
Report Number
NIST SP 559r1


Kamas, G. , Kamas, G. and Howe, S. (1990), Time and frequency users manual:, , National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed February 28, 2024)
Created January 1, 1990, Updated May 20, 2023