AN UPDATE ON PTB’S ACTIVITIES IN TIME AND FREQUENCY

Recent activities in the field of time and frequency pursued at PTB were directed towards an improvement in quality and reliability of services offered by PTB. The infrastructure for realizing the time scale UTC (PTB) and the monitoring of PTB’s time services was modernized. Several calibration exercises were conducted which resulted in an improved knowledge of internal delays of PTB’s time comparison equipment. As the foundation of our work, we continued the operation of the primary clocks CS1 and CS2, and of the cold-atom cesium fountain CSF1