[S-GD23] Gravity and Geoid

[SGD23-P02] Improvement of the Gravity database of Kanazawa University

*Ryo HONDA¹, Akihiro SAWADA², Yoshihiro HIRAMATSU² (1.Tono Research Institute of Earthquake Science, 2.Nat. Sys. College of Sci. and Eng., Kanazawa Univ.)

Keywords:Gravity Anomaly, Database

The gravity database of Kanazawa University is now available on web (Honda et al., 2012, J. Geod. Soc. Japan). The terrain correction for the gravity data is based on Honda and Kono (2005, J. Geod. Soc. Japan) applying 50 m gridded topography data, which is based on various DEM, including sea data published by Japan Oceanographic Data Center, Japan Coast Gurad. Recently, 10 m DEM published by Ministry of Land, Infrastructure, Transport and Tourism is available, which covers all over the country. We refined our correction routine to apply the fine DEM. The terrain gravity correction, especially on mountainous region, improved by this application. We report our new correction routine with the refined gravity anomaly map.

This research is promoted by the Grant-in-Aid for Scientific Research (C), No. 26400450.