Spherical and cylindrical power spectra at some key stages of the analysis pipeline. The left-most panel shows the spherical power spectra after preprocessing (“Data”), after sky model subtraction (“Skymodel Sub”), and after GPR (“GPR Residual”), along with the thermal noise power spectrum (“Thermal Noise”). For the cylindrical power spectra (second and third panels), the ratio with respect to the thermal noise power spectrum is shown. The white dashed lines indicate the horizon limit. The spherical power spectra after noise bias subtraction and suppression factor correction are shown in the rightmost panel.