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systematicswg:telecons:2018-10-01:start

On the call today: Brendan

  • Calibration sims
  • FSL sims

Some plots on far sidelobe simulations from Karl

  • A reminder of what a cut through the sidelobes looks like: sidelobe cut grasp fullsky 1 deg pixels from GRASP
  • Running this through the Planck LevelS pipeline and Andrea's sims gave a difference map of: diff map l=90, m=20
  • In retrospect this was obviously wrong as the pipeline tried to reconstruct the sidelobes using alms with lmax=90, m_max=20. The largest sidelobe is a few degrees in width, so this doesn't work well. Additionally the main beam is 6 arcmin but GRASP pixels were 1 deg, probably this creates the ringing.
  • Using a higher resolution input map dtheta = 0.035, dphi = 0.5 and lmax=4000, m_max=720 (beyond the map resolution) still fails to recontruct the sidelobes. cartview, 20x20 deg mollview
  • a 1D cut built using alms with m=0 terms only. center 2 deg masked out. Some error exists m=0 only, centermask 2 deg
systematicswg/telecons/2018-10-01/start.txt · Last modified: 2018/10/01 11:03 by kyoung