JpGU-AGU Joint Meeting 2020

Presentation information

[E] Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS09] Interdisciplinary studies on pre-earthquake processes

convener:Katsumi Hattori(Department of Earth Sciences, Graduate School of Science, Chiba University), Dimitar Ouzounov(Center of Excellence in Earth Systems Modeling & Observations (CEESMO) , Schmid College of Science & Technology Chapman University, Orange, California, USA), Jann-Yenq LIU(Department of Space Science and Engineering, National Central University, Taiwan), Qinghua Huang(Peking University)

[MIS09-P11] Development of Ionospheric Electron density tomography using linear regularization.

*Sanaka Saito1, Rui Song1, Katsumi Hattori1 (1.Chiba University)

The physical mechanisms of pre-seismic ionospheric anomalies are still not wel-known. In order to clarify the physical mechanism, it is essential to understand the three-dimensional distribution of ionospheric electrons. [Hirooka et al., 2012] developed and operated ionospheric tomography by using GEONET data. However, their method has a drawback that the estimation of the ionospheric structure becomes unstable because the SN ratio falls during the night. Therefore, it is necessary to continuously reconstruct the three-dimensional structure of the ionospheric electron density. We tried to develop ionospheric tomography which can be applied in the nighttime. In this study, we developed a 3D tomography using the Phillips-Tikhonov regularization. In order to evaluate the performance, we used simulated data with International Reference Ionosphere (IRI) model for reconstruction. The results are not so bad and will be shown in the presentation.