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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 28 July 2022, 0h UTC, the value for DUT1 will be 0,0 s.
(IERS Bulletin D 142, 7 July 2022)

Latest TF Bulletins

Latest Bulletins
March 2023 - 202304.txt
February 2023 - 202303.txt
January 2023 - 202302.txt
December 2022 - 202301.txt
November 2022 - 202212.txt
October 2022 - 202211.txt
September 2022 - 202210.txt
August 2022 - 202209.txt
July 2022 - 202208.txt
June 2022 - 202207.txt
May 2022 - 202206.txt
April 2022 - 202205.txt
        
Archived copies
2023.zip
2022.zip
2021.zip
2020.zip
2019.zip
2018.zip
2017.zip
2016.zip
2015.zip
2014.zip
2013.zip
2012.zip