134 citations · 224 across the 8 of their papers we have counts for
8 papers
Relations Between Generalized JST Algorithm and Kalman Filtering Algorithm for Time Scale Generation
Yuyue Yan, Takahiro Kawaguchi, Yuichiro Yano +2
In this paper, we present a generalized Japan Standard Time algorithm (JST-algo) for higher-order atomic clock ensembles and mathematically clarify the relations of the (generalize…
Roadmap towards the redefinition of the second
N. Dimarcq, M. Gertsvolf, G. Mileti +34
This paper outlines the roadmap towards the redefinition of the second, which was recently updated by the CCTF Task Force created by the CCTF in 2020. The main achievements and the…
Structured Kalman Filter for Time Scale Generation in Atomic Clock Ensembles
Yuyue Yan, Takahiro Kawaguchi, Yuichiro Yano +2
In this article, we present a structured Kalman filter associated with the transformation matrix for observable Kalman canonical decomposition from conventional Kalman filter (CKF)…
Higher-Order Allan Variance for Atomic Clocks of Arbitrary Order: Mathematical Foundation
Takayuki Ishizaki, Taichi Ichimura, Takahiro Kawaguchi +2
In this paper, we perform a time-domain analysis of the higher-order Allan variance for atomic clock models of arbitrary order. Adopting a standard atomic clock model where the tim…
Absolute frequency of at uncertainty by reference to remote Primary Frequency Standards
Nils Nemitz, Tadahiro Gotoh, Fumimaru Nakagawa +4
The optical lattice clock NICT-Sr1 regularly reports calibration measurements of the international timescale TAI. By comparing measurement results to the reports of eight Primary F…
Range Variation Monitoring with Wireless Two-Way Interferometry (Wi-Wi)
Bhola R. Panta, Kohta Kido, Satoshi Yasuda +6
We demonstrated a simple technique for monitoring range variation with millimeter-precision between two remote sites using off-the-shelf wireless communication modules. The need fo…
Months-long real-time generation of a time scale based on an optical clock
Hidekazu Hachisu, Fumimaru Nakagawa, Yuko Hanado +1
Time scales consistently provide precise time stamps and time intervals by combining atomic frequency standards with a reliable local oscillator. Optical frequency standards, howev…
SI-traceable measurement of an optical frequency at low level without a local primary standard
Hidekazu Hachisu, Gérard Petit, Fumimaru Nakagawa +2
SI-traceable measurements of optical frequencies using International Atomic Time (TAI) do not require a local primary frequency reference, but suffer from an uncertainty in tracing…