Measured bin-averaged T_i from DMSP for the pre-storm quiet period for three storms. The results for August 2011 (a, b, left); September 2011 (c, d, middle); January 2012 (e, f, right) storms are shown. At top are the NH observations (a, b, c), with SH results below (d, e, f). The magenta triangles and squares illustrate the locations of convection reversal boundaries along DMSP paths.