Defining body
International Earth Rotation and Reference Systems Service (IERS)
The service that maintains the international celestial and terrestrial reference frames and the parameters linking them — the Earth orientation parameters. The IERS monitors the Earth's rotation and axis, publishes UT1−UTC and polar motion, and announces the leap seconds that keep civil time aligned with the turning Earth.
Highlights
- ›Keeper of the reference frames, Earth orientation, and leap seconds
Related systems & concepts
Across the reference systems
Knowledge connections
- Associated withThe International Celestial Reference Frame (ICRF3)
- Associated withEarth Orientation Parameters
- Associated withInternational Astronomical Union (IAU)
- Associated withThe International Celestial Reference Frame (ICRF3)
- Associated withEarth Orientation Parameters
- Associated withThe Leap Second
- Associated withUniversal Time (UT1)
Sources
The primary and reference sources this topic draws on.
- IAUInternational Astronomical Union
Official naming, definitions, constellation boundaries, and astronomical nomenclature.