Astronomical time.
Abstract
Astronomical time serves as the basis for civil time and is required to describe the orientation of the Earth with respect to an inertial reference frame. The definitions of astronomical time scales are reviewed as well as observational methods. The causes of the variations in the Earth's rotation are explained and a brief overview of international efforts to maintain astronomical time scales is presented.
- Publication:
-
IEEE Proceedings
- Pub Date:
- July 1991
- DOI:
- Bibcode:
- 1991IEEEP..79..915M
- Keywords:
-
- Ephemeris Time;
- Sidereal Time;
- Time Measurement;
- Universal Time;
- Annual Variations;
- Astronomical Coordinates;
- Earth Rotation;
- Inertial Reference Systems;
- Periodic Variations;
- Secular Variations;
- Astronomy;
- Time Scales;
- Time Determination;
- Earth Rotation: Variations