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Fig. 1.


Cylindrically averaged power spectra for various gridding settings. From left to right, top to bottom: direct FT inversion, nearest-neighbour gridding (no oversampling), default settings for WSCLEAN, default settings for IDG, increased oversampling and kernel size settings for WSCLEAN without w correction and including w correction, but with a low number of w layers. Nearest-neighbour gridding results are drawn with a different colour scale. Black dashed line: horizon wedge. Pink dashed line: same with additional space for the windowing function. Blue dashed line: primary beam (5°) wedge. Gridding parameters are abbreviated as follows: o = oversampling factor, s = gridding kernel size, nwl = number of w-layers, and p = padding factor.

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