Half-ring sum (blue), difference (orange), and cross (green) power spectra from NPIPE (solid lines) and PR3 (dashed lines). Improvements in gap-filling and transfer-function deconvolution reduce the small-scale half-ring correlations in NPIPE data from PR3 levels. The power spectra are binned into 100 logarithmically-spaced bins, and corrected for sky fraction. The 70 GHz results are shown as a reference case without half-ring correlations.