SPECTRAL_CLEAN

        [BUNDLES\]SPECTRAL_CLEAN MODE [Control ]

      Perform a Clean with different spectral scales.

       MODE can be
         FFT       Clean the Fourier Transform of the spectra
         WAVE      Clean a Wavelet Transform of the spectra
         DUAL Ns   Clean at two different spectral resolutions
         MULTI Ns  Clean at two (or more) spectral resolutions.
    Instead of Cleaning separately individual  channels,  SPECTRAL_CLEAN  cleans
    either  Spectral  Transform  of the data cube (along the velocity axis), and
    performs the inverse transformation to restore the channel-based Clean  com-
    ponents.

    The  SPECTRAL_CLEAN  method can improve deconvolution of spectrally well re-
    solved faint line wings, yielding more accurate integrated line  fluxes,  at
    the  cost  of  some extra computations.  However, SPECTRAL_CLEAN can be ham-
    pered by strong velocity gradient, that require supports that differ  widely
    among channels.


    Standard  CLEAN  control parameters apply. However the METHOD must allow re-
    trieving Clean Componentes: MRC is thus excluded.  SPECTRAL_CLEAN  can  also
    work on Mosaics.