“…In recent years data obtained by the advanced EISCAT (European Incoherent Scatter) facility located at Tromso, Norway (69.6°N,19.2°E, A = 66.3°) (Folkestad et al, 1983) has been used by several authors to derive the auroral E-region neutral wind for different geomagnetic conditions (Williams and Virdi, 1989;Manson et al, 1990Manson et al, , 1992Kunitake and Schlegel, 1991;Virdi and Williams, 1993;Brekke et al, 1994;Nozawa and Brekke, 1995;Kofman et al, 1996).…”