Results of robustness tests performed for the MAP spectrum estimation. The top row corresponds to the high noise and boosted signal scenario, while the bottom row corresponds to a low noise and standard signal scenario. The left column shows the dynamic range between the input RFI and 21 cm signal power spectrum in each scenario. The second and third columns show the cross-coherence between the noise-realization-subtracted residual Stokes I data against the input signal corresponding to the two methods M1 (RFI spectrum estimation from Stokes V) and M2 (RFI spectrum estimation from Stokes I). The white dashed lines indicate the horizon limit.