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タイトル: 4. The Coordinate Transformation of the Japan Geodetic Reference System to the Japan Hydrographic Department Geoid
その他のタイトル: 4. 水路部ジオイドに基づく日本測地基準系の変換
著者: Yatabe, Manabu
著者(別言語): 矢田部, 学
発行日: 1983年7月28日
出版者: 東京大学地震研究所
掲載誌情報: 東京大学地震研究所彙報. 第58冊第1号, 1983.7.28, pp. 135-161
抄録: The geodetic reference system of Japan based on a Bessel ellipsoid does not fit well the geoid in and around Japan, so that the astrogeodetic deflections of the vertical mostly point to the northwest. This unsuitability is caused by the following facts: (a) The geoidal slope around the Tokyo geodetic datum station is steeper than those in other areas. (b) The astrogeodetic deflection of the vertical is taken as zero at the Tokyo geodetic datum station. During the period from 1947 to 1977, the astrogeodetic deflections of the vertical were newly observed at 324 triangulation points by the Geographical Survey Institute. Meanwhile, the geoidal heights in and around Japan have been obtained by the Hydrographic Department of Japan by combining land- and sea-surface gravity data with the satellite data GEM 10B. The present study is devoted to making the coordinate transformation of the geodetic reference system of Japan bestfitting the Japan Hydrographic Department geoid (Ganeko's geoid). The result shows that the correction for the deflection of the vertical at the Tokyo geodetic datum station amounts to ξ0=-11".98 (towards the north) and η0=+10".24 (towards the east). This values are well consistent with the results previously obtained by many geodesists.
URI: http://hdl.handle.net/2261/12869
ISSN: 00408972


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