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Welcome to the web site of the Time & Frequency laboratory of the National Metrology Institute of South Africa (NMISA).

Announcements

On 6 April 2019, the GPS week number rolled over. This can cause some older GPS receivers to stop functioning, become unstable or display incorrect information. See this document for more information.

From 17 July 2021, 0h UTC, the value for DUT1 will be -0,1 s.
(IERS Bulletin D 141, 29 June 2021)

Latest TF Bulletins

Latest Bulletins
September 2021 - 202110.txt
August 2021 - 202109.txt
July 2021 - 202108.txt
June 2021 - 202107.txt
May 2021 - 202106.txt
April 2021 - 202105.txt
March 2021 - 202104.txt
February 2021 - 202103.txt
January 2021 - 202102.txt
December 2020 - 202101.txt
November 2020 - 202012.txt
October 2020 - 202011.txt
       
Archived copies
2021.zip
2020.zip
2019.zip
2018.zip
2017.zip
2016.zip
2015.zip
2014.zip
2013.zip
2012.zip
2011.zip