[M-TT37] New Frontier of Earth Science pioneered by Dense GNSS Observation Networks

Wed. May 29, 2024 3:30 PM - 4:45 PM 301B (International Conference Hall, Makuhari Messe)

convener:Yusaku Ohta(Research Center for Prediction of Earthquakes and Volcanic Eruptions, Graduate School of Science, Tohoku University), Takuya NISHIMURA(Disaster Prevention Research Institute, Kyoto University), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Mikiko Fujita(Japan Agency for Marine-Earth Science and Technology), Chairperson:Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Mikiko Fujita(Japan Agency for Marine-Earth Science and Technology)

The Global Navigation Satellite System (GNSS) is an observation sensor with high temporal resolution that can monitor crustal deformation caused by earthquakes and volcanic phenomena, the dynamics of water vapor in the troposphere, and spatio-temporal variations in the ionosphere caused by solar activity and other surface phenomena on the Earth. In Japan, GSI has been operating GEONET for more than 25 years since 1996, consisting of more than 1,300 GNSS observation points with 20-30 km spacing, and has greatly contributed to understanding various earth science phenomena. On the other hand, recent years have seen remarkable technological developments such as automated driving and drones. GNSS is the foundation of the navigation technology that underlies these technologies, and in addition to conventional metric positioning, centimeter-accurate, real-time position information acquisition using carrier phase is becoming universally available. Cell phone carriers have started to deploy their own GNSS observation networks throughout Japan as a reference site, and their applications to earth science have also been started. In this session, we discuss the usability and issues of the dense GNSS observation network and discuss a wide range of topics related to earth science based on the dense GNSS observation data.

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3:30 PM - 3:45 PM

[MTT37-06] GNSS precipitable water vapor distribution and vertical structure revealed by very dense GNSS observation network

*Mikiko Fujita¹ (1.Japan Agency for Marine-Earth Science and Technology)

3:45 PM - 4:00 PM

[MTT37-07] InSAR tropospheric correction using dense GNSS tropospheric products

*Yo Fukushima¹, Yusaku Ohta², Sardila Nurulhikmah Sailellah² (1.International Research Institute of Disaster Science, Tohoku University, 2.Graduate School of Science, Tohoku University)

4:00 PM - 4:15 PM

[MTT37-08] 3-D structure of the ionospheric disturbance associated with the intense magnetic storms in 2023 by GNSS tomography with a dense GNSS network data

*Susumu Saito¹, Taisei Nozaki², Mamoru Yamamoto³ (1.Electronic Navigation Research Institute, National Institute of Maritime, Port, and Aviation Technology, 2.Graduate School of Informatics, Kyoto University, 3.Research Institute of Sustainable Humanosphere, Kyoto University)

4:15 PM - 4:30 PM

[MTT37-09] Ionospheric seismology with a dense GNSS network: Multiple source signatures in coseismic ionospheric disturbances by the 2024 Noto earthquake

*Kosuke Heki¹ (1.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University)

4:30 PM - 4:45 PM

[MTT37-10] Traveling Ionospheric Disturbances Following the 2024 Noto Peninsula Earthquake: Total Electron Content Observations by Ultra-Dense GNSS Receiver Networks

*Yuichi Otsuka¹, Weizheng Fu¹, Atsuki Shinbori¹, Takuya Sori¹, Michi Nishioka², Septi Perwitasari² (1.Institute for Space-Earth Environmental Research, Nagoya University, 2.National Institute of Information and Communications Technology)