Fig. 1
Sky region scanned by 18 sample detectors, sparsely located in the two focal planes of LSPE-SWIPE, in ecliptic coordinates (upper panel) and the inverse pixel condition number Rcond as an estimator of polarization angle coverage per pixel (lower panel). In our definition, Rcond = 1/2 in case of perfect angle coverage uniformity. Both maps are at HEALPix (see Górski et al. 2005) Nside = 128.
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