Japan Geoscience Union Meeting 2023

Presentation information

[E] Online Poster

P (Space and Planetary Sciences ) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM12] Coupling Processes in the Atmosphere-Ionosphere System

Mon. May 22, 2023 10:45 AM - 12:15 PM Online Poster Zoom Room (2) (Online Poster)

convener:Huixin Liu(Earth and Planetary Science Division, Kyushu University SERC, Kyushu University), Yuichi Otsuka(Institute for Space-Earth Environmental Research, Nagoya University), Loren Chang(Department of Space Science and Engineering, National Central University), Yue Deng(University of Texas at Arlington)


On-site poster schedule(2023/5/21 17:15-18:45)

10:45 AM - 12:15 PM

[PEM12-P09] Development of an Ionospheric-Plasmaspheric Data Assimilation Model

*CHIYEN LIN1,2, Jann-Yenq LIU1,2,3, Charles Lin4 (1.Center for Astronautical Physics and Engineering, National Central University, TAIWAN, 2.Department of Space Science and Engineering, National Central University, Taiwan, 3.Center for Space and Remote Sensing Research, National Central University, Taiwan., 4. Department of Earth Sciences, National Cheng Kung University, Taiwan.)

Keywords:Ionosphere, Plasmasphere, Data Assimilation, FORMOSAT-7/COSMIC-2

The data assimilation model global ionospheric specification (GIS) reconstructs ionospheric three-dimensional electron density structure by using a Gaussian-Markov Kalman filter to assimilate ground-based GNSS slant total electron content (TEC) and FORMOSAT-7/COSMIC-2 radio occultation slant TEC observations. The study based on GIS to extends the altitude boundary of the model from the ionosphere to the lower plasmasphere (from 1,000 to 21,000 km). The new ionospheric-plasmaspheric data assimilation model could assimilate the completed sounding path of ground-based GNSS slant TEC and F7/C2 absolute TEC (podTc2) to improve ionospheric electron density structure and also reconstruct the plasmasphere. The observing system simulation experiment (OSSE) is applied to confirm the accuracy of the reconstructed electron density structure in the ionosphere and plasmasphere. The OSSE demonstrates that analysis results are similar to the simulation truth, indicating that the model can reconstruct the ionosphere and the plasmasphere. In addition, electron density reconstruction is also being implemented to study the influence of geomagnetic storms on the ionosphere and plasmasphere.