Demonstration of two different approaches to the lunar de-occultation technique. a: contains the results from differencing two CLEAN maps via the image-differencing (IMD) method, i.e. Im_diff. b: output when the visibility data are differenced first before CLEANing, as per the visibility-differencing (VISD) method, i.e. F⁻¹{V_diff}. In both a and b, the differenced data are 1 min apart. The solid white circle is the visible solar limb and the dashed pink circle is the visible lunar limb.