Half-mission half-difference power spectra estimated by Planck 2018 (blue), Planck PR4 (green), and BEYONDPLANCK. In the case of BEYONDPLANCK, orange curves show spectra obtained from maps that are calibrated jointly (or “conditionally” with respect to the signal model), while red curves show spectra from maps that are processed completely independently. Columns show 30, 44, and 70 GHz results, while rows show TT, EE, and BB spectra. The dashed black line shows the best-fit Planck 2018 ΛCDM spectrum convolved with the instrument beam.