Physikalisch-Technische Bundesanstalt

The Physikalisch-Technische Bundesanstalt (PTB) is based in Braunschweig (Brunswick) 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 four German caesium atomic clocks, CS1, CS2, CSF1 and CSF2, and the longwave time signal DCF77. In addition, the PTB operates time servers for the distribution of time on the internet. They are also responsible for the certification of voting machines for the German federal and European elections. The PTB was originally founded in 1887 as the Physikalisch-Technische Reichsanstalt (PTR) (the Physical and Technical Institute of the German Reich). The goal of the organization was supervising and directing calibration and establishing metrological standards. Research areas included spectroscopy, photometry, electrical engineering, and cryogenics. Werner von Siemens was instrumental in its establishment. Until 1934 the PTR was part of the Reichsinnenministerium (the Reich's Ministry of Interior Affairs).

Address
Bundesallee 100, Braunschweig, Germany
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Meteorology meets metrology

Barely has the research aircraft HALO entered the kilometre-high clouds towering above the Brazilian rainforest than the researchers find themselves in a complete haze, but they can rely on the measuring ...

dateDec 02, 2014 in Earth Sciences
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Hollow optical fibers for UV light

(Physikalisch-Technische Bundesanstalt (PTB)) Researchers from the Max Planck Institute for the Science of Light in Erlangen/Germany and of the QUEST Institute, based at the Physikalisch-Technische Bundesanstalt, ...

dateJul 02, 2014 in Optics & Photonics
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Helmholtz Prize for the 'new' ampere

In time for the maybe critical decisions on the change to the 'new' SI at the Conference Internationale des Poids et Mesures this November, a group of scientists from the Physikalisch-Technische Bundesanstalt ...

dateMar 31, 2014 in General Physics
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Measuring height by connecting clocks

How far above sea level is a place located? And where exactly is "sea level"? It is one objective of the geodesists to answer these questions with 1 cm accuracy. Conventional measurement procedures or GPS ...

dateOct 02, 2013 in General Physics
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