Top: MADping pixel variances for temperature and polarization and the reciprocal condition number of the pixel observation matrices. Bottom: correlation coefficient  × 10³ between I − Q, I − U and Q − U pixels. This part of the noise covariance is dominated by white noise which is modeled equivalently in all three paradigms. Hence, MADmap, ROMA, Madam and Springtide results are nearly identical. Maps are rotated into galactic coordinates to show the structure near the ecliptic poles.