Noise realizations for the “double retangular” horn arrangements, in Healpix gnomonic coordinates centered in (α = 0° ,δ = −17.5°). Left: white noise realization after multiplying the rms by a Gaussian map, using N_side = 256. Right: rms realization for the double-rectangular configuration (with time spread between five different horn offsets) for two years of observation with a 70 K system temperature at HEALpixN_side = 512. (The rms maps are produced at a higher HEALpix pixelization and then degraded to the working resolution discussed in the text). Map of the corresponding rms of the projected white noise part. The color scale is saturated at five times the rms of a map with homogeneous coverage and same sky fraction.