DocumentCode
1353406
Title
Astronomical time
Author
Mccarthy, Dennis D.
Author_Institution
US Naval Obs., Washington, DC, USA
Volume
79
Issue
7
fYear
1991
fDate
7/1/1991 12:00:00 AM
Firstpage
915
Lastpage
920
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
Keywords
Earth rotation; astronomical techniques; measurement standards; time and latitude; time measurement; Earth orientation; Earth rotation; astronomical time scales; ephemeris time; inertial reference frame; rotational time; terrestrial dynamical time; Earth; Extraterrestrial measurements; Frequency; Navigation; Observatories; Rotation measurement; Solar system; Sun; Time measurement; Timing;
fLanguage
English
Journal_Title
Proceedings of the IEEE
Publisher
ieee
ISSN
0018-9219
Type
jour
DOI
10.1109/5.84967
Filename
84967
Link To Document