Fig. A.2

Total uncertainty in , σi, as a function of bin identifier, i (thick magenta line), for the 356 bins with latitude | b | ≥ 10°. Also plotted are the two contributions to σi (see Eq. (A.1)), which arise from the reconstruction of Oppermann et al. (2015) (σrec,i; red line) and from turbulence in the magneto-ionic ISM (σturb,i; brown line), respectively. The latter, in turn, is accompanied by its two contributions (see Eq. (A.6)), which arise from the N′ear nearest layers (thin green line) and from the Nlayer,i−N′ear more distant layers (thin blue line), respectively. Bins are ordered by bands of increasing latitude, from b = −90° to 90°, and in each latitude band, by increasing longitude, from ℓ = −180° to 180°. The vertical grey band in the middle corresponds to bins with latitude | b | < 10°, which are excluded from our study.
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