Glossary
The following terms are related to the IERS and to Earth rotation and reference systems in general.
Additions will follow, proposals are welcome.
- Barycentric Coordinate Time (TCB)
- Celestial Ephemeris Origin (CEO)
- Celestial Intermediate Pole (CIP)
- coordinate time
- Coordinated Universal Time (UTC)
- Earth Rotation Angle (ERA)
- Fifth Fundamental Catalogue (FK5)
- Geocentric Coordinate Time (TCG)
- International Atomic Time (TAI)
- International Celestial Reference Frame (ICRF)
- International Celestial Reference System (ICRS)
- leap second
- Modified Julian Day (MJD)
- Non-Rotating Origin: see Celestial Ephemeris Origin
- pole angles
- stellar angle: see Earth Rotation Angle
- Temps-coordonnée barycentrique: see Barycentric Coordinate Time
- Temps-coordonnée géocentrique: see Geocentric Coordinate Time
- Terrestrial Ephemeris Origin (TEO)
- Terrestrial Time (TT)
- Universal Time (UT1)