[S-GD01] Geodesy and Global Geodetic Observing System

Fri. Jun 4, 2021 10:45 AM - 12:15 PM Ch.22 (Zoom Room 22)

convener:Koji Matsuo(Geospatial Information Authority of Japan), Yusuke Yokota(Institute of Industrial Science, The University of Tokyo), Toshimichi Otsubo(Hitotsubashi University), Chairperson:Masahiro Nakashima(Geospatial Information Authority of Japan), Yuji ITOH(Earthquake Research Institute, The University of Tokyo)

Geodesy is a discipline that aims to define a Terrestrial Reference Frame for accurate positioning in the Earth and monitor/understand the Earth system through precise measurements of the Earth's shape, gravity, and rotation, as well as their temporal evolutions. In this session, we call for wide range of papers concerned with geodesy and its application to geoscience. Topics of interest will include but not limited to recent advances in measurement techniques, data analysis, numerical modeling or theoretical studies of geodesy. This session also welcomes topics of interdisciplinary studies on geoscience using ground-based geodetic techniques (spirit leveling, absolute/relative gravimeter, strain meter and so on) or space geodetic techniques (GNSS, VLBI, SLR, DORIS, GRACE, satellite altimetry and so on). In addition, we also provide a forum for discussing GGOS (Global Geodetic Observing System) related observation programs, advancements of geodetic techniques, collaboration among various organizations in the world.

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10:45 AM - 11:00 AM

[SGD01-07] Absolute Gravity Measurements at Teshikaga in 2019 and 2020

*Yuichi Imanishi¹, Ryuichi Nishiyama¹, Kazunari Nawa² (1.Earthquake Research Institute, The University of Tokyo, 2.AIST)

11:00 AM - 11:15 AM

[SGD01-08] Reading value dependence of scale factors for LaCoste & Romberg relative gravimeters

*TAMAKI WAKABAYASHI¹, Takahito Kazama¹, Yoichi Fukuda², Yuki Abe³, Shin Yoshikawa⁴, Takahiro Ohkura⁴, Yuichi Imanishi⁵, Ryuichi Nishiyama⁵, Keigo Yamamoto⁶ (1.Graduate School of Science, Kyoto University, 2.National Institute of Polar Research, 3.Hot Springs Research Institute of Kanagawa Prefecture, 4.Aso Volcanological Laboratory, Kyoto University, 5.Earthquake Research Institute, The University of Tokyo, 6.Disaster Prevention Research Institute, Kyoto University)

11:15 AM - 11:30 AM

[SGD01-09] Vertical Movements of GEONET sites in Niigata region (Part 2)

*Seiichi Shimada¹, Yuka Ito¹, Masaatsu Aichi¹, Takemu Seki², Tomochika Tokunaga¹ (1.Graduate School of Frontier Sciences, The University of Tokyo, 2.Department of Systems Innovation, Faculty of Engineering, The University of Tokyo)

11:30 AM - 11:45 AM

[SGD01-10] An Apparent Reduction of Crustal Activity before the Great East Japan Earthquake

*Yasushi Harada¹, Yuka Murai¹ (1.School of Marine Science and Technology, Tokai University)

11:45 AM - 12:00 PM

[SGD01-11] Early afterslip of the 2011 Tohoku-Oki sequence estimated by the GNSS carrier phase to fault slip approach

*Yusuke Tanaka¹, Yusaku Ohta¹, SHINICHI MIYAZAKI² (1.Tohoku University, 2.Kyoto University)

12:00 PM - 12:15 PM

[SGD01-12] Crustal subsidence as the elastic response to the SWJ heavy rain in 2020

*Kosuke Heki¹, Syachrul Arief² (1.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University, 2.Indonesia Geospatial Information Agency)

Session information