Division A WG Time Metrology Standards — Functional


The Working Group with the link to time metrology standards within the IAU Division A has the objective of enhancing the interaction between astronomers and the time and frequency metrology community. The time metrology community provides the reference time scale, of atomic nature, which is the basis of coordinate times used for space-time referencing in astronomy. The dynamical time scale based on precision timing of pulsars has the potential of improving the long-term standard of time. Changes forecasted in the next years will require common actions of astronomers and metrologists; examples are the possible new definition of the second consequence of the advent of optical clocks, and the contribution to the studies on the adoption of a uniform international reference time scale.


Working Group Members (18)


Division A Fundamental Astronomy

Elisa Felicitas Arias

Observatoire de Paris, Université PSL, CNRS
Sorbonne Université, LNE
61 Avenue de l'Observatoire
75014 Paris

NCA adherence: France

Last updated:
March 25, 2021

Search Scientific Bodies


IAU GA 2021 Business Sessions

Strategic Plan

IAU Strategic Plan 2020–2030

Strategic Plan

IAU Code of Conduct

Code of Conduct

Symposia and Meetings


IAU General Assembly 2022



How to Become a Member

IAU Catalyst

Latest Catalyst

IAU e-Newsletter
Volume 2021 n° 6

Latest e-Newsletter

Subscribe to the e-Newsletter


IAU Office of Astronomy for Development

Office for Astronomy Development

IAU Office for Young Astronomers

Office for Young Astronomers

IAU Office for Astronomy Outreach

Office for Astronomy Outreach

IAU Office of Astronomy for Education

Office of Astronomy for Education

International School for Young Astronomers

International School for Young Astronomers

WG Small Bodies Nomenclature Bulletins

WG Small Bodies Nomenclature Bulletins