Two upper panels: Observed (thin curves) directional 45–65 keV electron intensities by STEREO A (left column) and STEREO B (right column) for Event I (top row) and Event II (bottom row). The intensity profiles for each field of view are identified by different colors as indicated in the inset (Sun and Antisun fields of view at the top panels; North and South fields of view at the second panels). Thick lines are the corresponding model fits. Bottom panels show the evolution of the pitch-angle cosine measured at the center of each field of view (color curves). The gray area shows the pitch-angle range covered by the telescopes. Each title shows the inferred value of the mean-free path for each case.