Bureau International des Poids et Mesures
US Naval Observatory IERS Conventions Center
The Bureau International des Poids et Mesures (BIPM)
and the US Naval Observatory (USNO)
have provided the Conventions Center of the International Earth Rotation and Reference Frames Service
(IERS) since 1 January 2001.
The main product of the Center is the IERS Conventions, which describes reference systems realized
by the IERS and the models and procedures used for this purpose.
The Conventions are in the form of a book
published at intervals of a few years, the latest of which is the IERS Conventions (2010) that has been published
as Technical Note 36.
The technical content of the chapters and the associated material
is available here.
The process for updating the Conventions (2010) is starting, see here.
Please send us feedback on the IERS Conventions by filling the survey.