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Physical Measurement LaboratoryTime and Frequency Division

## Time Realization and Distribution Group

-  NIST USNO  Expand or Collapse    -  NIST USNO 2022 Archive 
  -  NIST USNO 2021 Archive 
  -  NIST USNO 2020 Archive 
  -  NIST USNO 2019 Archive 
  -  NIST USNO 2018 Archive 
  -  NIST USNO 2017 Archive 
  -  NIST USNO 2016 Archive 
  -  NIST USNO 2015 Archive 
  -  NIST USNO 2014 Archive 
  -  NIST USNO 2013 Archive 
  -  NIST USNO 2012 Archive 
  -  NIST USNO 2011 Archive 
  -  NIST USNO 2010 Archive 
  -  NIST USNO 2009 Archive 
  -  NIST USNO 2008 Archive 
  -  NIST USNO 2007 Archive 
  -  NIST USNO 2006 Archive 
  -  NIST USNO 2005 Archive 
  -  NIST USNO 2004 Archive 
  -  NIST USNO 2003 Archive 

# NIST USNO

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## UTC (USNO) - UTC (NIST)

The United States Naval Observatory (USNO) and the National Institute of Standards and Technology (NIST) make regular comparisons of their respective time scales. These comparisons are made using GPS common-view measurements from up to approximately 10 GPS satellites. The table below lists recent differences between the two time scales.

### Weekly UTC(USNO, Master Clock) - UTC(NIST)Values

Time and frequency

-  NIST USNO 2022 Archive **›** 

### HEADQUARTERS

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