Example of image in Faraday cube given in the polarised intensity at −2.25 radm⁻² for the 01l observation (left image), which is not properly corrected for the RM_ion. There is almost no emission visible in comparison to the reference (014) observation (middle image), whose image is given at −3.25 radm⁻² to account for a relative misalignment of +1.0 radm⁻² between the two observations. The polarised emission is visible in the restored Faraday cube of the 01l observation (right image), which is corrected using the estimated ΔΦ_shift given in Fig. A.2.