Update of research activities on time and frequency at the National Institute of Information and Communications Technology (NICT)

The National Institute of Information and Communications Technology (NICT) in Japan have five time and frequency research and service groups. Those are, Atomic Frequency Standards Group, Time and Frequency Measurements Group, Japanese Standard Time Group, Quasi-Zenith Satellite System Group, and Time Applications Group. In this paper, we introduce the recent activities of these five groups.

[1]  Tadahiro Gotoh,et al.  GPS common-view with geodetic receivers , 2004 .

[3]  K. Hayasaka,et al.  Single Ca + Ion Trapping toward Precise Frequency Measurement of the 4 2 S 1/2 - 3 2 D 5/2 Transition , 2005 .

[4]  Yuko Hanado,et al.  Upgrading of UTC(CRL) , 2003, IEEE International Frequency Control Symposium and PDA Exhibition Jointly with the 17th European Frequency and Time Forum, 2003. Proceedings of the 2003.

[5]  Yuko Hanado,et al.  Improvement of frequency change at Japan standard time , 2006 .

[6]  Michito Imae,et al.  Development of multichannel dual-mixer time difference system to generate UTC (NICT) , 2005, IEEE Transactions on Instrumentation and Measurement.

[7]  H. Kiuchi,et al.  Development of Time Comparison Equipment for ETS-VIII Satellite , 2004, 2004 Conference on Precision Electromagnetic Measurements.

[8]  T. Otsubo,et al.  Atmospheric Loading Blue-Sky Effects on SLR Station Coordinates , 2004 .

[9]  Tadahiro Gotoh,et al.  Development of Time Comparison Equipment for ETS-VIII Satellite , 2004, CPEM 2004.

[10]  J. Vondrák.  A contribution to the problem of smoothing observational data , 1969 .

[11]  M. Kajita,et al.  Narrow-Line Diode Laser System for the S-D Transmon of Ca+Ion , 2004, 2004 Conference on Precision Electromagnetic Measurements.

[12]  Yasuhiro Koyama,et al.  VLBI Observation of Spacecraft for Navigation –Approaches with Group Delay and Phase Delay – , 2005 .

[13]  Mizuhiko Hosokawa,et al.  Accuracy evaluation of optically pumped primary frequency standard CRL-O1 , 2004 .

[14]  T. Gotoh.  Improvement GPS time link in Asia with all in view , 2005, Proceedings of the 2005 IEEE International Frequency Control Symposium and Exposition, 2005..

[15]  Pascale Defraigne,et al.  Time transfer to TAI using geodetic receivers , 2003 .

[16]  Michito Imae,et al.  Effects of ionospheric correction on GPS time transfer throughout Asia , 2004 .