QUBIC

Minutes:

• Synthesized beam handling in the code (Jean-Christophe):
  - code now working with theoretical sb if use_file=False
  - next will be to create files for a more realistic instrument

• Shape fixing and homogeneisation of the code (Alexandre):
  - the creation of H can be done in the same class for UWB and DB; MB to be implemented but should be easy with new structure
  - to make it more straightforward and allow for easy H stacking (for adding atmosphere for example), the way QUBIC + Planck H is created is being changed to be a BlockColumnOperator([H_qubic, H_planck], axisout=0)
  - the creation of N and TOD has to be adapted accordingly for DB
  - working for UWB

• Preconditioner for CMM (Leonora):
  - the equation is H * (s - x_planck) = d - H * x_planck
  - we should then just be solving the noise, but it diverges even it noiseless (?)