Title :
Direct frequency comparison of intercontinentally separated Sr lattice clocks using carrier-phase two-way satellite frequency transfer
Author :
Ido, T. ; Fujieda, M. ; Hachisu, H. ; Nagano, Shigeo ; Gotoh, Toshiyuki ; Falke, St ; Huntemann, N. ; Grebing, C. ; Lipphardt, B. ; Lisdat, Ch ; Piester, D.
Author_Institution :
Space-Time Stand. Lab., Nat. Inst. of Inf. & Commun. Technol, Koganei, Japan
Abstract :
Two strontium lattice clocks, one in Japan and the other in Germany were directly compared by a two-way satellite frequency transfer technique that utilizes the carrier phase of the transmitted signal. The comparison has resulted in a fractional difference of 1.1(1.6)×10-15, directly confirming the frequency agreement on an intercontinental scale.
Keywords :
atomic clocks; frequency standards; strontium; transfer standards; TWSTFT; carrier phase two way satellite frequency transfer; frequency agreement; intercontinental scale; intercontinental separated lattice clock; signal transmission; Clocks; Lattices; Optical fibers; Satellites; Time-frequency analysis; TWSTFT; carrier phase; lattice clocks;
Conference_Titel :
Frequency Control Symposium (FCS), 2014 IEEE International
Conference_Location :
Taipei
DOI :
10.1109/FCS.2014.6859906
