Journal of the Geodetic Society of Japan
Online ISSN : 2185-517X
Print ISSN : 0038-0830
ISSN-L : 0038-0830
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Volume 6, Issue 4
Displaying 1-3 of 3 articles from this issue
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  • General Considerations Concerning the Elimination of the Drift Curve in the Earth Tidal Observations
    By Ichiro NAKAGAWA
    1961 Volume 6 Issue 4 Pages 121-135
    Published: March 30, 1961
    Released on J-STAGE: July 05, 2011
    DOIhttps://doi.org/10.11366/sokuchi1954.6.121
    JOURNAL FREE ACCESS
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    In case of treating the earth tidal data observed by gravimeter, it is a difficult problem how to eliminate fully the drift. As the method available, 25 hours successive moving mean have been used customarily for the long time, but since 1941, Doodson-Warburg's method was adopted as a good method. Recently, Pertzev has devised the excellent one.In this paper, the dispute is made summarily from the stand-points of both the accuracy of results and the labour of analysis pertaining to the problem of drift. And several methods are devised newly which are more accurate and excellent compared with any one hitherto adopted.
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  • On the Calibrations of the Askania Gs-11 Gravimeter No. 111
    [in Japanese], Ichiro NAKAGAWA
    1961 Volume 6 Issue 4 Pages 136-150
    Published: March 30, 1961
    Released on J-STAGE: September 07, 2010
    DOIhttps://doi.org/10.11366/sokuchi1954.6.136
    JOURNAL FREE ACCESS
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    In case of the gravity observations by means of gravimeter, the most fundamental element is the accurate determination of scale constant. In operation of North-American Gravimeter or Worden Gravimeter, the scale constant originally given by its manufacture is usually adopted. Concerning the Askania Gravimeter, the scale constant is also given by the maker, but on the other hand the bead device in itself is conveniently and supplementary available as the calibrating device for the scale constant. In this paper, the calibration of the Askania Gs-11 Gravimeter No. 111 at eleven stations by the bead device is in detail discussed in case of earth tidal observation of gravity during the epoch of the International Geophysical Year.
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  • [title in Japanese]
    [in Japanese]
    1961 Volume 6 Issue 4 Pages 151-169
    Published: March 30, 1961
    Released on J-STAGE: September 07, 2010
    DOIhttps://doi.org/10.11366/sokuchi1954.6.151
    JOURNAL FREE ACCESS
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