“…It has been demonstrated that the ionosphere could be remarkably disturbed during SSW events, and one of the most distinct responses is the occurrence of a semidiurnal pattern in ionospheric parameters (Anderson & Araujo-Pradere, 2010;Chau et al, 2009;Chau et al, 2012;Fang et al, 2012;Fang et al, 2014;Fejer et al, 2010;Fuller-Rowell et al, 2011;Goncharenko et al, 2012;Goncharenko & Zhang, 2008;He et al, 2017;Maute et al, 2015;Mo & Zhang, 2018;Pedatella et al, 2012;Pedatella & Forbes, 2009;Pedatella & Forbes, 2010;Siddiqui et al, 2017). It is first shown in Goncharenko and Zhang (2008) with the analysis of ion temperature from the Millstone Hill Incoherent Scatter Radar.…”