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341 results:
51. 2005 Wynands - Metrologia 42 Atomic fountain clocks  
Date: 26.02.2010
2005 Wynands - Metrologia 42 Atomic fountain clocks Atomic Fountain Clocks R. Wynands, S. Weyers Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany (Dated: April 26,  
52. 2004 Bauch PTB-Mitt 114,4 DCF77  
Date: 01.03.2010
Percental score: 1 %
2004 Bauch PTB-Mitt 114,4 DCF77 PTB-Mitteilungen 114 (2004), Heft 4 Themenschwerpunkt • 345 Zeit- und Normalfrequenzverbreitung mit DCF77 Dirk Piester1, Peter Hetzel2 und Andreas  
53. 2009 Bauch Results fof the j TWSTFT calibration of 7 Euro Stations  
Date: 22.03.2010
Percental score: 3 %
2009 Bauch Results fof the j TWSTFT calibration of 7 Euro Stations Results of the 2008 TWSTFT Calibration of Seven European Stations Andreas Bauch, Dirk Piester Peter Whibberley Time Dissemination  
54. 2010 Esteban Improved GPS-based Time Link Calibration Involving ROA and PTB  
Date: 23.03.2010
Percental score: 2 %
2010 Esteban Improved GPS-based Time Link Calibration Involving ROA and PTB 714 IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control , vol. 57, no. 3, March 2010 Improved  
55. 2009 Piester EFTF Concept for an acuurate Calibration  
Date: 23.03.2010
Percental score: 3 %
2009 Piester EFTF Concept for an acuurate Calibration Concept for an Accurate Calibration of Long Baseline Two-Way Satellite Time and Frequency Transfer (TWSTFT) Links via Two Separated Transponders  
56. 2007 Fujieda First comparison primfrequstandard Europe Asia  
Date: 23.03.2010
Percental score: 2 %
2007 Fujieda First comparison primfrequstandard Europe Asia First comparison of primary frequency standards between Europe and Asia M. Fujieda∗ , T. Gotoh∗ , D. Piester† , M. Kumagai∗ , S. Weyers† ,  
57. 2005 Piester Two-Way Satellite Time Transfer USNO-PTB  
Date: 24.03.2010
Percental score: 2 %
2005 Piester Two-Way Satellite Time Transfer USNO-PTB Two-Way Satellite Time Transfer Between USNO and PTB D. Piester, A. Bauch, J. Becker, and T. Polewka A. McKinley, L. Breakiron, A. Smith, B.  
58. Broadband measuring station for the extended testing of the directional response pattern of sound level meters and the calibration of measuring microphones  
Date: 07.04.2010
Percental score: 4 %
It is common practice to use sinusoidal sound signals as an excitation signal to reach the low measurement uncertainties required for the testing of the directional response pattern of sound level  
59. The half-life of Se-79  
Date: 13.07.2010
Percental score: 4 %
Within the scope of a cooperation of several institutes, the half-life of the long-lived isotope Se-79 could be determined with a clearly improved uncertainty. PTB has contributed in particular by  
60. Successful testing of platinum-iridium sorption artefacts for precision mass determinations under vacuum conditions  
Date: 27.07.2010
Percental score: 4 %
The influence of sorption effects on the accuracy of mass determinations under vacuum conditions was significantly reduced by means of sorption artefacts made of a platinum-iridium alloy. The  
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