Progress in Time and Radio Frequency

Measurements at the P.T.R.


FIAT 895


Office of Military Government for Germany (US)

date 10 September 1946


Lt. Col. Richard Ranger

Technical Industrial Intelligence Division

U.S. Department of Commerce



Field Information Agency, Technical

United States Group Control Council for Germany


Shown is the exceptional Michelson Interferometer setup for measuring SHF wavelengths, which they regarded being a primary frequency standard

This photo has been used primary for my Bournemouth AS11 presentation called:

Some aspects of German radar calibration

Please consider also this paper as it goes into some details of this exceptional aspect

The entire text content is in contrast to normal practice in German language

The German P.T.R. is like the US National Bureau of Standards or British NPL





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