[S-GD02] Geodesy and Global Geodetic Observing System

Wed. May 25, 2022 9:00 AM - 10:30 AM 101 (International Conference Hall, Makuhari Messe)

convener:Yusuke Yokota(Institute of Industrial Science, The University of Tokyo), convener:Yuta Mitsui(Department of Geosciences, Shizuoka University), Koji Matsuo(Geospatial Information Authority of Japan), Chairperson:Masahiro Nakashima(Geospatial Information Authority of Japan), Yusaku Ohta(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University)

Geodesy is a discipline that aims to define a Terrestrial Reference Frame for accurate positioning 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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9:00 AM - 9:15 AM

[SGD02-13] Postseismic gravity change after the 2011 Tohoku Earthquake observed by superconducting gravimeters at Mizusawa, Japan

*Yoshiaki Tamura¹, Yuichi Imanishi², Ryuichi Nishiyama², Takahito Kazama³, Koji Matsuo⁴ (1.National Astronomical Observatory of Japan, Mizusawa VLBI Observatory, 2.Earthquake Research Institute, The University of Tokyo, 3.Graduate School of Science, Kyoto University, 4.Geospatial Information Authority of Japan)

9:15 AM - 9:30 AM

[SGD02-14] Determination of geopotential values at the optical lattice clocks based on geodetic approaches

*Masahiro Nakashima¹, Shuntaro Fukaya¹, Takashi Toyofuku¹, Kumikazu Ochi¹, Koji Matsuo¹ (1.Geospatial Information Authority of Japan)

9:30 AM - 9:45 AM

[SGD02-15] Geodetic leveling and gravity measurements for reducing uncertainty of NICT optical frequency standards owing to gravitational redshift and its quantitative evaluation - Part 1

*Ryuichi Ichikawa¹, Hidekazu Hachisu¹, Tetsuya Ido¹, Yoshifumi Hiraoka², Eiichirou Harima², Shuntaro Fukaya², Masahiro Nakashima² (1.National Institute of Information and Communications Technology, 2.Geospatial Information Authority of Japan)

9:45 AM - 10:00 AM

[SGD02-16] Development of the low-cost GNSS receiver and its application to the earth science

*Yusaku Ohta¹ (1.Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University)

10:00 AM - 10:15 AM

[SGD02-17] The First-time Absence of Chandler Wobble since 2015 in the Observation History

*Ryuji Yamaguchi¹, Masato Furuya² (1.Department of Natural History Sciences, Graduate School of Science, Hokkaido University, 2. Department of Earth and Planetary Sciences, Hokkaido University)

10:15 AM - 10:30 AM

[SGD02-18] Hypotheses on the absence of Chandler wobble since 2015

*Masato Furuya¹, Ryuji Yamaguchi² (1.Department of Earth and Planetary Sciences Hokkaido University, 2.Department of Natural History Sciences, Hokkaido University)

Session information