Component separation results using the simulation pipeline. Top: angular power spectra for the input H I plus noise signal (black), the GNILC recovered H I plus noise signal (red), and the PCA recovered H I plus noise signal with three modes removed (blue) at ≈1.1 GHz. For this particular channel and configuration (double-rectangular, 28 feeds, one-year observation time, and β = 0.25), N_Rec (GNILC) equals 21.43%. Bottom: cross-correlation coefficient r(ℓ) among the recovered signals (GNILC and PCA) and the input signal.