Example angular auto-spectra (upper panel) and unbinned signal-to-noise ratios for the BAO (middle panel) and for the whole spectra (lower panel). Three different choices for the size of the photo-z bin are shown. The lines with three different thickness levels, starting from the thickest, assume the optical follow-up parameters (i) σ₀ = 10^-3, f_fail = 0.0; (ii) σ₀ = 10^-2, f_fail = 0.0; and (iii) σ₀ = 10^-2, f_fail = 0.3, respectively. In the upper panel for the first of the above three cases binned 1σ error boxes are also shown. The light gray vertical stripe marks the small-scale modes excluded from our analysis.