Figure 3

Histograms of longitudes and latitudes

Histograms of the longitudes (blue histogram) and absolute values of the latitudes (yellow histogram), respectively, of the current sheet normals, where the longitudes were constrained to lie between 135° and 315° for definitiveness, guided by the observation that the most probable HCS normal at 1 AU would be the ortho-Parker longitude (225°); all longitudes outside of this range were mapped into it by the addition of 180°. Notice that the latitude is binned in equal increments of solid angle.