International Earth Rotation and Reference Systems Service

The IERS provides data on Earth orientation, on the International Celestial Reference System/Frame, on the International Terrestrial Reference System/Frame, and on geophysical fluids. It maintains also Conventions containing models, constants and standards.

国际地球自转服务机构（IERS）提供有关地球定向、国际天球参考系统/框架、国际大地参考系统/框架以及地球物理流体等方面的数据。同时，该机构还维护包含模型、常数和标准的公约。