- 1987: The International Earth Rotation Service (IERS) was founded by the International Astronomical Union and the International Union of Geodesy and Geophysics to replace the IPMS and the Earth Rotation Section of the BIH. In contrast to the IPMS, the IERSalso took on responsibility for celestial and terrestrial reference systems. BIH’s activities on time continued at the Bureau International des Poids et Mesures (BIPM).
- 1988, Jan. 1: IERS began operation with the following components: Central Bureau with Terrestrial Frame Section, Earth Orientation Section, Celestial Frame Section, and Rapid Service Sub-bureau (later: Sub-bureau for Rapid Service and Predictions), as well as VLBI, LLR, and SLR Coordinating Centres.
- 1989, March: Sub-bureau for Atmospheric Angular Momentum established.
- 1990, Jan. 1: GPS Coordinating Centre established.
- 1994, Oct. 1: DORIS Coordinating Centre established.
- 1998, Jan. 1: GGF [1998: MGGF] Coordinating Centre established, replacing the Sub-bureau for Atmospheric Angular Momentum.
- 2001, Jan. 1: New structure of IERS.
- 2003: IERS renamed to International Earth Rotation and Reference Systems Service.
