If non-zero, the common-mode will be estimated and removed additionally as a pre-processing step. All the " com.$<$xxx$>$" and " gai.$<$xxx$>$" parameters are parsed and used (e.g., to also flag bad data and optionally flatfield off the relative response to the common-mode signal). If this pre-processing step is chosen, it is still possible to specify COM/GAI as model components in the iterative solution. [0]

SC2CLEAN, MAKEMAP, CALCQU