Comparison of the Gaussian comb with 30 components fitted to pre-calibrated histograms from the MICE simulation. The blue and orange points show histograms with bin widths of Δz = 0.05 and Δz = 0.025, respectively. The error bars correspond to the diagonal elements of the covariance matrix. The lines represent the Gaussian comb with 30 components fitted to the data histograms. We note that when fitting the redshift distribution, the full covariance matrix of the data histogram is taken into account.