DocumentCode
1406767
Title
The time services of the U.S. Naval observatory
Author
Hellweg, J. F.
Author_Institution
U.S. Naval Observatory, Washington, D. C.
Volume
51
Issue
1
fYear
1932
Firstpage
47
Lastpage
48
Abstract
ONE HUNDRED and one years ago the Naval Observatory was created. Since then it has had the determination and broadcasting of the nation´s time. This is broadcast in mean solar time although kept in sidereal time. Measurement of time is based upon the earth´s rotation and is very accurately observed and calculated. Observations are made by transit instruments with which the successive transits of predetermined stars are observed.
Keywords
Accuracy; Companies; DC motors; Induction motors; Rotors; Synchronization; Synchronous motors;
fLanguage
English
Journal_Title
Electrical Engineering
Publisher
ieee
ISSN
0095-9197
Type
jour
DOI
10.1109/EE.1932.6429630
Filename
6429630
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