The International Earth Rotation Service (IERS) is an international organization for measuring and calculating the Earth’s rotation parameters and a reference system for astronomical and geographical position data.
IAG collaborates closely with numerous organizations within geodesy and beyond. See the list for details.
This website is provided by the IAG Secretariat and the GGOS Coordinating Office, which are hosted by the BEV – Federal Office of Metrology and Surveying (Bundesamt für Eich- und Vermessungswesen) in Vienna, Austria.
© IERS