Diagnostic plot output from RFIClean. The composite plot on the left shows the statistics of the Fourier frequencies that were excised. For every radio frequency channel in the main panel, the grayscale mapping shows how often a Fourier frequency was excised. Darker colors indicate larger numbers. The adjacent panels at the top and on the right show the averages along the vertical and horizontal directions, respectively. The far right panel shows how often the radio frequency channels were identified as narrowband RFI and excised (see text for more details).