Angular power spectra for CMB B-mode-cleaned maps for the SAT configuration and sky coverage. The solid grey zigzag lines are BB power spectra of 100 simulations, and the average is shown as red stars. The theoretical input power spectra are shown as solid black lines. The residual HILC noise and foreground levels are shown as dotted and dashed lines, respectively. The solid magenta line shows the average de-lensed B-mode spectra over 100 simulations. The dashed blue line shows the average power spectra of Galactic-foreground B modes at the frequency channels 95 and 145 GHz. The dashed grey line shows the tensor B-mode level for r = 0.003.