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SDI

        CLEAN  [FirstPlane  [LastPlane]]  [/PLOT  Clean|Residu]  [/FLUX Fmin
    Fmax] [/QUERY] [/RESTART [File]]

    with METHOD = SDI

    Perform a Steer-Dewdney-Ito CLEAN. This clean method selects an ensemble
    of  clean  components and remove them at once using FFTs.  It works best
    for extended sources and UV coverages with short  spacings.  In  such  a
    case,  it  may avoid the "ringing" features which appear using the CLARK
    or HOGBOM techniques. In mosaic mode  (see  command  MOSAIC),  a  mosaic
    clean is performed.

    SDI is very sensitive to the selected support (see MASK and SUPPORT com-
    mands), especially when the dirty beam sidelobes are significant.


Gildas manager 2023-06-01