Fig. 6
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Images constructed from the same observation with our four different cases. Top left: no RFI contamination. Top right: TABASCAL fully removes the RFI and recovers the astronomical signal with comparable image noise to the uncontaminated data. Bottom-left and right: the images from perfect 3σ flagging and AOFLAGGER respectively showing significantly higher image noise of 6× and 8× respectively. The AOFLAGGER image shows significant striped image artefacts which largely invalidates its use for science, with purity and completeness of around 20% and 50% respectively (see Figures 9 and 8). The mean RFI S/N in this data was 23. For large RFI amplitudes the quality differences between TABASCAL and the flagging methods increases further.
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