CMB anisotropies on circular scans
  We address the problem of map-making with data from the Planck Surveyor High Frequency Instrument, with an emphasis on the understanding and modelling of instrumental effects, and in particular that of sidelobe straylight. We propose a map-making method which takes advantage of the very special properties of the Planck scanning strategy along circular scans. 
J. Delabrouille, R. Gispert and J.-L. Puget