Stokes parameters of the electromagnetic fluxes and their polarization properties as captured in a plane at a height H and averaged over a time interval δt. The trajectory approaches the dipole axis at a minimum angular distance β_sim. Blue line: Stokes parameter I of the total flux. Dashed green line: Stokes parameter |L| of the linearly polarized flux. Dash-dotted red line: Stokes parameter V of the circularly polarized flux. Orange crosses: PA. Dashed black line: The RVM fit (Eq. (24)) of the PA. The positions of the profiles (a–f) are shown in Fig. 6 as orange lines. The PA scales between plots.