Journal of the Geodetic Society of Japan
Online ISSN : 2185-517X
Print ISSN : 0038-0830
ISSN-L : 0038-0830
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Volume 7, Issue 2-3
Displaying 1-5 of 5 articles from this issue
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  • The Second Order Magnetic Survey in Chûgoku, Shikoku and Kyûshû Districts
    Geographical Survey Institute
    1962 Volume 7 Issue 2-3 Pages 39-45
    Published: August 30, 1962
    Released on J-STAGE: March 01, 2011
    DOIhttps://doi.org/10.11366/sokuchi1954.7.39
    JOURNAL FREE ACCESS
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    Since 1952, the second order magnetic survey has been carried out by the Geographical Survey Institute, and the results in the Hokkaidô, Tôhoku and Kantô districts; Chûbu and Kinki districts were already reported. (1) (2) In this paper the results of survey in the Chugoku, Shikoku and Kyushu districts and Izu-shichito are reported. In the western part of Japan where the present survey was carried out, the magnetic anomalies are found to be rather small except in the nothern part of Chûgoku district, the volcanic zones of Mts. Aso, and Kirishima in Kyûshû district.
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  • Analysis of Mean Sea Level at Aburatsubo
    Takeshi DAMBARA
    1962 Volume 7 Issue 2-3 Pages 46-57
    Published: August 30, 1962
    Released on J-STAGE: September 07, 2010
    DOIhttps://doi.org/10.11366/sokuchi1954.7.46
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    Twelve-month's running mean values of sea level, temperature of the sea water, atmospheric pressure, and atmospheric temperature at Aburatsubo are calculated. They are shown in Fig. 1. In this figure it can easily be found that there is a duration of very strong correlation between temperature of sea water and atmospheric temperature . In order to discuss the effect of atmospheric temperature on that of sea water, equation (1) is assumed, and the coefficient, β, is decided by the least square method. Using this value of β, the effective temperature of sea water, te, which has the relation to the change of height of sea level, can be calculated.Twelve-month's running mean values of sea level, temperature of the sea water, atmospheric pressure, and atmospheric temperature at Aburatsubo are calculated. They are shown in Fig. 1. In this figure it can easily be found that there is a duration of very strong correlation between temperature of sea water and atmospheric temperature . In order to discuss the effect of atmospheric temperature on that of sea water, equation (1) is assumed, and the coefficient, β, is decided by the least square method. Using this value of β, the effective temperature of sea water, te, which has the relation to the change of height of sea level, can be calculated.In Section 3, a method of detecting the change of height of mean sea level due to the change of effective temperature is considered. The result is given by the equation (11). As this equation shows, the deviation of 1°C from the mean values of te, i.e., 18°, 794, gives the change of sea level of 31.5 mm.In Section 4, the coefficient of the effect of atmospheric pressure onto the sea level is deduced by using the correlation between sea level and atmospheric pressure when typhoon passes away right above the tidal station. The calculated values are nearly same to the theoretical value of -13.2 mmlmmHg. After some discussions it is concluded that the theoretical value is sufficient for the usual case . In Table IV, the correction of sea level due to the effective temperature of sea water, (dL)t, the correction due to atmospheric pressure, (dL)p, and the corrected height of the mean sea level, L', are given respectively for the duration of 1947-1960.
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  • On the Results of the Mizusawa PZT Observations
    Sigetugu TAKAGI
    1962 Volume 7 Issue 2-3 Pages 58-61
    Published: August 30, 1962
    Released on J-STAGE: September 07, 2010
    DOIhttps://doi.org/10.11366/sokuchi1954.7.58
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    The position errors of the Mizusawa PZT stars are obtained from the results of the observations made in the period from 1957 to 1960. By comparing the revised positions with those of the fundamental catalogues, it is found the Mizusawa PZT star system is in accord with N30 for right ascension and with GC system for declination. The amplitude of the local term is found to be at most 5 ms in the Mizusawa time.
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  • The Computations of the Vertical Deviation and the Unification of Datum in Far East Asia
    By Matakichi OMORI
    1962 Volume 7 Issue 2-3 Pages 62-98
    Published: August 30, 1962
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.11366/sokuchi1954.7.62
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    [in Japanese]
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  • [title in Japanese]
    [in Japanese]
    1962 Volume 7 Issue 2-3 Pages 99
    Published: August 30, 1962
    Released on J-STAGE: September 07, 2010
    DOIhttps://doi.org/10.11366/sokuchi1954.7.99
    JOURNAL FREE ACCESS
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