Physikalisch-Technische Bundesanstalt
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The Physikalisch-Technische Bundesanstalt (PTB) is based in Braunschweig and Berlin. It is the national institute for natural and engineering sciences and the highest technical authority for metrology and physical safety engineering in Germany.
Part of its brief is the accurate measurement of time. It is responsible for the German atomic clock DCF77.
External links
- Physikalisch-Technische Bundesanstalt (http://www.ptb.de/index_en.html)