Title :
The time services of the U.S. Naval observatory
Author_Institution :
U.S. Naval Observatory, Washington, D. C.
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;
Journal_Title :
Electrical Engineering
DOI :
10.1109/EE.1932.6429630
