A comparison of clustering covariance elements (columns), estimated for each redshift/colour galaxy sample (rows) with the SWOT internal jackknife per MICE patch (X, green) and the total jackknife over all patches (Y, solid coloured lines), plotted as X/Y − 1. The 0.16 , 0.5 , 0.84 percentiles over the patch estimates are indicated by dashed lines and shading. Pink solid lines and hatching indicate covariance elements scaled by the fitted variables a_ij described in Appendix A.2.