Simulation results. (a) Time profiles at 625 kHz for multiple viewing angles. The collection of rays is restricted to latitudes within the range of 0.85 < cos ϕ < 1. The times of the peak flux are marked as vertical dashed lines. (b) Intensity fit results. The four viewing longitudes are −149° (P1), 42° (P2), −71° (P3), and 0° (P4) degrees. The flux errors were set at 50% of the peak fluxes and are displayed as vertical lines. (c) Positions of the intrinsic source (initial positions determined based on the density model; solid circle symbols), the apparent source (deduced from scattering simulations; solid square symbols), as well as source positions derived from intensity fits (plus symbols) and timing method (solid triangle symbols).