Δ Τ from photoelectric observations of occultations in Japan for 1955 to 1959.
Data of photoelectric observations of occultation made at the Tokyo Astronomical Observatory and the Hydrographic Office for the years of 1955 to 1959 are combined together, and re-reductions are made employing the Improved Lunar Ephemeris, limb corrections by Watts’profile, International ellipsoid, and corrections Δφ= + 10”， Δλ=＋20” to the geodetic datum of Japan. ΔTO’s are evaluated for middle of each year, and combined with provisional values of ΔTO for 1960 to 1966. These ΔTO’s agree well with those of Washington meridian observations in rate as well as in absolute value. Comparison of provisional values of ΔTl with AT-UT2 suggests necessity of research on the adopted frequency of caesium standard in one ephemeris second.
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| Main Authors: | , |
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| Format: | Journal Contribution biblioteca |
| Language: | Japanese |
| Published: |
1967
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| Online Access: | http://hdl.handle.net/1834/16410 |
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