Study of Geoid Undulation in Southwestern Japan

日本西南部大地水准面起伏研究

• 批准号: 03452057
• 负责人: NAKAGAWA Ichiro
• 金额: $ 3.97万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452057/
• 关键词: GEOID; ALTIMETRY DATA; GPS; GRAVITY MEASUREMENT; LEVELLING SURVEY; GEODETIC SURVEY; TIDAL OBSERVATION; アルチメトリィ-・デ-タ

1. In order to determine the geoid undulation precisely in the southwestern part of Japan, data obtained from gravity measurements, levelling surveys and tidal observations as well as satellite altimetry data have been collected.2. GPS measurements at 57 points in the southwestern part of Japan have been carried out with WM102 GPS receivers. Average repeatability of heights measured by GPS was 5.5 cm. Geoid undulation differences at these points have been determined by comparing ellipsoidal height differences measured by GPS with orthometric height ones so far obtained from levelling surveys.3. In Tottori, Beppu, Kii and Shikoku regions, precise gravity measurements were performed with LaCoste & Romberg gravimeters.4. Based on data mentioned above (1 - 3), a contour map of geoid undulation differences in the southwestern part of Japan was obtained. The geoid differences determined by the present study were approximately consistent with the proceeding geoids, such as the ORI-89 geoid, but systematic discrepancies of the order of a few ten centimeters were detected.5. GPS/levelling geoid undulation differences were compared with three-dimensional seismic velocity anisotropy so far obtained from P-wave travel-time analyses.

1.为了准确确定日本西南部的大地水准面起伏，收集了重力测量、水准测量和潮汐观测数据以及卫星测高数据。用WM102型GPS接收器在日本西南部的57个点进行了GPS测量。GPS测量高度的平均重复性为5.5 cm。通过比较GPS测得的大地水准面高差与水准测量获得的大地水准面高差，确定了这些点处的大地水准面起伏差。在鸟取、别普、基伊和四国地区，使用LaCoste和Romberg重力仪进行了精确的重力测量。根据上述(1-3)资料，绘制了日本西南部大地水准面起伏差等值线图。本研究确定的大地水准面差异与之前的大地水准面基本一致，如ORI-89大地水准面，但检测到了几十厘米量级的系统差异。将GPS/水准大地水准面起伏差与迄今由P波走时分析得到的三维地震速度各向异性进行了比较。

项目成果

NAKAGAWA,I.,S.TAKEMOTO,T. HIGASHI,K. DOI,Y. YABUTA and T. YAMAMOTO: "Application of Superconducting Gravity Meters,Laser Strain Meters and Relative GPS Measurements to Investigate Geodynamic Phenomena in Southwestern Japan," AGU Geophysical Monograph,IUGG

中川，I.，S.竹本，T.

藤森 邦夫・山本 剛靖・東 敏博・竹本 修三・中島 一郎・田部井 隆雄: "GPSを用いた西南日本におけるジオイド比高の測定" 京都大学防災研究所年報. No.36A. (1993)

Kunio Fujimori、Takeyasu Yamamoto、Toshihiro Higashi、Shuzo Takemoto、Ichiro Nakajima、Takao Tabei：“利用 GPS 测量日本西南部的大地水准面高度”，京都大学防灾研究所年度报告（1993 年）。

FUJIMORI, K., T. YAMAMOTO, H. HIGASHI, S. TAKEMOTO, I. NAKAGAWA and T. TABEI: "Measurements of Geoid Undulation Differences in Southwestern Japan with GPS." Annuals of Disas. Prev. Res. Inst., Kyoto Univ.No.36B-1. (1993)

FUJIMORI, K.、T. YAMAMOTO、H. HIGASHI、S. TAKEMOTO、I. NAKAGAWA 和 T. TABEI：“利用 GPS 测量日本西南部大地水准面起伏差异”。

I.Nakagaya,S.Takemoto,T.Higashi,K.Doi,Y.Yabuta and T.Yamamoto: "APPLICATION OF SUPERCONDUCTING GRAVITY METERS,LASER STRAIN METERS AND TELATIVE GPS MEASUREMENTS TO INVESTIGATE GEODYNAMIC PHENOMENA IN SOUTHWESTERN JAPAN" In:AGU Geophysical Monograph,IUGG Sy

I.Nakagaya、S.Takemoto、T.Higashi、K.Doi、Y.Yabuta 和 T.Yamamoto：“应用超导重力仪、激光应变仪和相对 GPS 测量来调查日本西南部的地球动力学现象”，载于：AGU 地球物理

NAKAGAWA, I., S. TAKEMOTO, T. HIGASHI, K. DOI, Y. YABUTA and T. YAMAMOTO: "Application of Superconducting Gravity Meters, Laser Strain Meters and Relative GPS Measurements to Investigate Geodynamic Phenomena in Southwestern Japan." AGU Geophysical Monogra

NAKAGAWA, I.、S. TAKEMOTO、T. HIGASHI、K. DOI、Y. YABUTA 和 T. YAMAMOTO：“应用超导重力计、激光应变计和相对 GPS 测量来研究日本西南部的地球动力学现象。”