Constrained realizations with Commander

Many CMB analyses benefits greatly from full-sky coverage, for instance studies of statistical isotropy. Commander provides a convenient interface to generating constrained realizations that fills in a confidence mask with Gaussian fluctuations that have phases consistent with the unmasked sky and a user-specified power spectrum.

Mask inpainting for SMICA through Gaussian constrained realizations


  • Template parameter files have been developed, currently being tested

Project scope:

  • Develop Commander parameter files and runscripts for user-friendly inpainting of temperature and polarization maps
  • Develop step-by-step tutorial, and publish on Cosmoglobe website
  • Publish example applications of these constrained realizations

Features to be studied:

  • Effect of beam and white noise regularization
  • Conjugate Gradient convergence rate and computational cost
  • Compare EB decorrelation efficiency with alternative methods
  • Study the effect of inpainting on TE correlations

Project team:

  • Tony Banday
  • Tom Orjollet-Lacomme (Coordinator)

How to get involved:

If you want to get involved, please send Tom Orjollet-Lacomme an email

Published May 2, 2022 11:38 AM - Last modified May 2, 2022 2:28 PM