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VI International Time Scale Algorithms Symposium and Tutorials

9-11 September 2015 (at the BIPM)


tsas SC

Organizing and Scientific Committee

Yuko Hanado

NICT, Tokyo, Japan

Patrizia Tavella

INRIM, Turin, Italy

Elisa Felicitas Arias

BIPM, Sèvres, France

Gianna Panfilo

BIPM, Sèvres, France

Peter Fisk

NMIA, Sydney, Australia

Demetrios N. Matsakis

USNO, Washington DC, USA


Aim of the Symposium and Tutorials

The aim is to establish the mathematical tools necessary to extract as much information as possible from data in time and frequency metrology in order to facilitate new scientific discoveries and new physical realities. The study and development of mathematical and statistical algorithms in the field of time and frequency are being driven by new time transfer techniques, new concepts of frequency standards and new wide‐scale applications of clocks and time scales. Current hot topics include measurement data processing, noise and bias identification, prediction, sound mathematical modelling, optimal time scales and security.

Key challenges for national and international timekeeping include: speeding up communication rates, designing a navigation system, robust alternate means of time transfer, fundamental physics experiments and the evaluation of clock performance. All these topics require special mathematical handling.

The symposium is being organized within the framework of the CCTF Working Group on Time Scale Algorithms (WG-ALGO), and aims to offer an overview of the different topics and to promote the exchange of experiences among scientists from different fields, including those new to the field. Tutorials, spontaneous contributions and round tables are foreseen and proposals are welcome.

Papers are solicited in the following areas

  • Theoretical research: improved and advanced algorithms, optimal combination of different type of clocks, analysis method of clock data, clock failure identification
  • Experimental realization: algorithms for UTC(k) realization (for example by using PFS), algorithms for space systems, algorithms for NTP and PTP, use of frequency data from optical fibres
  • Application techniques: models and algorithms for clock applications, encryption, authentication and secure communications
  • Approach to new timescale algorithms: pulsars for timescales, optical clocks for timescales
  • Other topics of interest


Deadline for abstract proposals: 15 May 2015

Deadline for registration to the symposium (speakers and attendees): 1st July 2015

Tutorial and Symposium fees

Tutorial 100 euros (full) 80 euros (Students)
Symposium 250 euros (full) 200 euros (Students)
Tutorial + Symposium 300 euros (full) 230 euros (Students)


The 6th Symposium follows the:

  • 1st Symposium - at the NBS (now NIST), USA, in 1972,
  • 2nd Symposium - at the NIST, USA, in 1982,
  • 3rd Symposium - at the IEN (now INRIM), Italy, in 1988,
  • 4th Symposium - at the BIPM in 2002 (see Metrologia 40 (3), 2003),
  • 5th Symposium at the ROA, San Fernando, Spain, in 2008 (see Metrologia 45(6), 2008).



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