Reconstructed synthetic magnetic field measurements (dashed) with 1σ confidence interval (shaded area) using the triple point constellation for the April event and a dual-point constellation for the May event. The reconstructed magnetic field is overlayed on top of the real in situ measurements for Solar Orbiter (a/d), BepiColombo (b/e), and Wind (c/f). The blue shaded area represents the defined UMFR interval and the dotted vertical lines show the used fitting points t_i. All magnetic fields are shown in local RTN coordinates.