Combined source completeness as a function of distance from the pointing centre (unresolved sources, left) and major axis of the source (resolved sources, right). The left plot reflects the overall structure of the pointings, and shows that completeness is quite straightforwardly a radially averaged version of the noise structure as shown in Fig. 3. Note that the flux density is normalised by σ₂₀. The right plot indicates a clear power law relation between the size of sources and the completeness, where larger sources are on average less complete.