“…These include airglow observations by the IMAGE (Immel et al 2004(Immel et al , 2007) and TIMED satellites (e.g., Basu et al 2009), and ion drift, density and composition measurements on board the Defense Meteorological Satellite Program (DMSP) (Basu et al 2001;Hartman and Heelis 2007), and Republic of China Satellite (ROCSAT-1) (e.g., Kil et al 2007;Fejer et al 2008a) satellites. In addition, total electric content (TEC) has been obtained from TOPEX satellite data (e.g., Scherliess et al 2008), and magnetic field, plasma density and TEC data have been derived from measurements on board the Challenging Minisatellite Payload (CHAMP) satellite (e.g., Lühr et al 2004).…”