S. Zou, J. Ren, Z. Wang, H. Sun, and Y. Chen. Impact of Storm-Enhanced Density (SED) on Ion Upflow Fluxes During Geomagnetic Storm. Frontiers in Astronomy and Space Sciences, volume 8, 2021 . J. Ren, S. Zou, J. Lu, N. Giertych, Y. Chen, R. H. Varney, and A. S. Reimer. Statistical Study of Ion Upflow and Downflow Observed by PFISR. Journal of Geophysical Research: Space Physics, volume 125, issue 10, 2020 . W. Zhu, J.-Y. Chen, Q. Zhang, and J.-M. Zhang. Mapping of High-Spatial-Resolution Three-Dimensional Electron Density by Combing of Full-Polarimetric SAR and IRI Model. Frontiers in Earth Science, volume 8, 2020 .