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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 2 May 2019, 0h UTC, the value for DUT1 is -0,2 s.
(IERS Bulletin D 140, 3 April 2019)

Latest TF Bulletins

Latest Bulletins
February 2020 - 202003.txt
January 2020 - 202002.txt
December 2019 - 202001.txt
November 2019 - 201912.txt
October 2019 - 201911.txt
September 2019 - 201910.txt
August 2019 - 201909.txt
July 2019 - 201908.txt
June 2019 - 201907.txt
May 2019 - 201906.txt
April 2019 - 201905.txt
March 2019 - 201904.txt
        
Archived copies
2020.zip
2019.zip
2018.zip
2017.zip
2016.zip
2015.zip
2014.zip
2013.zip
2012.zip
2011.zip