The map-making process of Cosmic Microwave Background data involves linearinversion problems which cannot be performed by a brute force approach for thelarge timelines of most modern experiments. We present optimal iterativemap-making methods, both COBE and Wiener, and apply these methods on simulateddata. They produce very well restored maps, by removing nearly completely thecorrelated noise that appears as intense stripes on the simply pixel-averagedmaps.
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