Abstract
view Abstract Citations (15) References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Proceedings of the Symposium on the Rotation of the Earth and Atomic Time Standards: Part II. The rotation of the earth: Variations in rotation of the earth, results obtained with the dual-rate moon camera and photographic zenith tubes Markowitz, Wm. Abstract Comparison of photographic zenith tube (P.Z.T.) observations with time derived from quartz-crystal clocks during 1951 to 1955 and with cesium standards of frequency during 1955 to 1958 indicates that the seasonal variation is nearly the same from year to year. Lunar-tidal inequalities of semi-monthly and monthly periods with amplitudes of about each were found. A preliminary value of the Love number, k, is derived. Observations made since 1952 with the dual-rate moon position camera are used to derive AT = ET - UT. Comparison of the P.Z.T. observations and atomic standards at the National Physical Laboratory and the Naval Research Laboratory shows details of the irregular variation from 1955 to 1958. Publication: The Astronomical Journal Pub Date: April 1959 DOI: 10.1086/107886 Bibcode: 1959AJ.....64..106M full text sources ADS |
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