Recently, Peter Rosenbusch, a famous expert at atomic frequency standards and researcher of the Paris Observatory, paid a seven-day academic visit to the NTSC at the invitation of the Quantum Frequency Standards Lab of NTSC.

Dr. Rosenbusch gave a report on Time and Frequency Activities at Paris Observatory at our institute on Oct. 26, introducing the activities at Paris Observatory in connection to time and frequency, such as the research & development of various atomic frequency standards, time comparison and the service of standard time. He focused on detailed introduction and analysis of cesium fountain clock -- the most precise atomic clock in the present world -- in his wonderful and impassioned report. And after it, he also had an extensive and deep discussion with the participants.

During the visit, Dr. Rosenbusch inspected the Quantum Frequency Standards Lab, praised highly the research progress made by the lab, and said that he would further promote the exchanges and cooperation between Paris Observatory and the NTSC in the field of atomic frequency standards.