Hemispheric Asymmetry of Pre-Midnight Topside Ionospheric Vertical Flow Velocities Observed at Midlatitudes by FORMOSAT-5 During Equinoxes

Shin-Yi Su, NCU National Central University of Taiwan, Tauyuan City, Taiwan, Chi-Kuang Chao, Center for Astronautical Physics and Engineering, National Central University, Taoyuan City, Taiwan and Chao Han Liu, Academia Sinica, Taipei, Taiwan