Sun-STEREO satellites and Sun-Earth directions (short-dashed lines), the STEREO-A POS direction (long-dashed line) and the north polar view of the LASCO/C2 occulter (solid line). The solid blue lines indicate the two possible propagation directions of the ejected plasma at the mean angular distances θ_A and from the STEREO-A POS, as computed by the polarization ratio technique. The numbers are the values of corresponding heliographic longitudes. s_C2 and are the distances in the LASCO/C2 POS that the ejected plasma would appear to run across when propagating at θ_A and .