Journal of the Geodetic Society of Japan
Online ISSN : 2185-517X
Print ISSN : 0038-0830
ISSN-L : 0038-0830
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Volume 9, Issue 3-4
Displaying 1-5 of 5 articles from this issue
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  • On the Relation between the Polar Motion and the Atmospheric Circulation
    Hideo MATSUKURA
    1963 Volume 9 Issue 3-4 Pages 97-116
    Published: March 31, 1964
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.11366/sokuchi1954.9.97
    JOURNAL FREE ACCESS
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    Succeeding R. Spitaler's idea, the author investigated statistically and synoptically the relation between the earth's polar motion and the world-wide meteorological change. In this note, he pointed out the existence of six or seven years' periodicity of the atmospheric circulation in the troposphere of the northern hemisphere and its close correlation with the polar motion. G. Warnecke found recently the world-wide period of six years in the temperature variation of the stratosphere, parallel with the same period of Ap index of the terrestrial magnetism.
    On the other hand, the author examined the temperature variations at the isobaric layers of 100 mb and 50 mb over Japan and revealed these surprisingly distinct correspondences with the polar motion. This fact indicates that six or seven years' periodicity of the temperature variation in the stratosphere may be caused by the polar motion.
    It is particular interesting that the atmospheric circulation of the troposphere in the region of high latitude shows almost the simultaneous variation with the polar motion, while the temperature variation of the stratosphere corresponds to the polar motion with the delay of 0.5-1.0 year. It seems, indeed, suggestive on the study of the relation between the atmospheric circulation in the troposphere and in the stratosphere, and even on the polar motion itself.
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  • On the Secular Variations of Longitudes (I)
    Masahisa TORAO, Seichi OKAZAKI, Yutaka SATO
    1963 Volume 9 Issue 3-4 Pages 117-125
    Published: March 31, 1964
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.11366/sokuchi1954.9.117
    JOURNAL FREE ACCESS
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    Using the data of observations and comparisons of time made during the period from 1933 to 1961, secular variations of the differences of the longitudes among Tokyo, Europe (the mean of 8 observatories), North-America (the mean of 2 observatories), South-America (the mean of 2 observatories), Tashkent and Zi-Ka-wei were investigated.
    The results obtained from three different treatments; (a) using the annual means of the data for the whole period, (b) using five years means of the same data and (c) solving separately for two periods before and after 1950.0, show that:
    (1) with great confidence we can conclude that the secular variations of the differences of longitudes between the following pairs of the observatories exist;
    Tokyo-Europe : + 1.0 ms/year±0.16 (m.e.)
    Tokyo-North-America : + 1.4ms/year±0.13
    Tokyo-South-America : + 1.6ms/year±0.06
    North-America-Europe: - 0.4ms/year±0.12
    (2) for other pairs of observatories, the secular variations can not be determined from the present data with great confidence.
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  • The Corrections to the Geodetic Coordinates in Japan due to the Change of the Ellipsoid and Error of the Coordinates at the Geodetic Datum
    Masanobu HIROBE
    1963 Volume 9 Issue 3-4 Pages 126-131
    Published: March 31, 1964
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.11366/sokuchi1954.9.126
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    The Bessel ellipsoid which is adopted as the reference ellipsoid of the Japanese geodetic system is not satisfactory approximation as the figure of the earth. Moreover, at the geodetic datum, it deflects considerably from the world-wide ellipsoid. In order to obtain practical corrections to the existing coordinates of any station in Japan due to the above two factors, the equations of the longitude- and latitude-difference between two stations are expanded to the required accuracy. The actual calculation is made by adopting first the International Ellipsoid instead of the Besselian, and secondarily the round values of + 15″ (in latitude) and -20″ (in longitude) as the corrections at the geodetic datum to make the Japanese system in of conformity with the world-wide geodetic system. The numerical values are shown in the annexed figure.
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  • [title in Japanese]
    C.A. Witten
    1963 Volume 9 Issue 3-4 Pages 132-139
    Published: March 31, 1964
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.11366/sokuchi1954.9.132
    JOURNAL FREE ACCESS
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  • Report on the Gravity Measurements by the Japanese Antarctic Research Expedition, 1957-62.
    Yoshimichi HARADA, Ichiro MURATA
    1963 Volume 9 Issue 3-4 Pages 140-143
    Published: March 31, 1964
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.11366/sokuchi1954.9.140
    JOURNAL FREE ACCESS
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