CLEAN_SIDELOBE

    Minimal relative intensity to consider for fitting the  syntheized  beam  to
    obtain the Clean beam parameters (BEAM_FITTED variable) when 0.  The default
    is 0.35.

    In  case of poor UV coverage, CLEAN_SIDELOBE should be higher than the maxi-
    mum sidelobe level to perform a good Gaussian fit. Some particularly bad  UV
    coverage may not allow any good fit at all, however.