IERS earth rotation and leap second tables for astropy
astropy-iers-data provides access to the tables provided by the International Earth Rotation and Reference Systems (IERS) service, in particular the Earth Orientation data allowing interpolation of published UT1-UTC and polar motion values for given times. It is not meant to be used directly, but by the core astropy package. The UT1-UTC values are used in Time and Dates (astropy.time) to provide UT1 values, and the polar motions are used in astropy.coordinates to determine Earth orientation for celestial-to-terrestrial coordinate transformations.
Homepage: https://docs.astropy.org/en/latest/utils/iers.html