Top panel: the blue curve shows the difference between 143hm1 × 143hm2 cross-spectra between the 2015 (destriped at Nside = 512) and 2018 (destriped at Nside = 2048) data. The red curve shows the difference between the 2015 solution destripped at Nside = 512 and at Nside = 2048. The green curve shows the improvement brought to the 2015 data by the use of the better 2018 gain solution keeping the destriping at Nside = 512. Bottom panel: associated level of improvement of the variance ratio between the destriped 2015 data at Nside = 512 and Nside = 2048.
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