Transfer functions for each of the five individual filters used in the pipeline. The normalization and pointing filters suppress large angular scales, while the 1/f filter almost entirely eliminates parallel modes larger than k = 0.02 Mpc⁻¹. The TOD PCA filter has almost no impact on the signal, primarily because so few modes are subtracted. The map PCA has a more noticeable signal loss, but it remains relatively scale-independent because the signal is still weak enough (see Sect. 6.4). The total pipeline transfer function shown in the leftmost panel of Fig. 15 is the product of these. The striped region to the left is not used in Season 2 results.