CLEAN_NKEEP
Keywords: imager

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CLEAN_NKEEP

        This is an integer specifying the minimum number of Clean components be-
        fore  testing if Cleaning has converged. The convergence is criterium is
        a comparison of the cumulative flux evolution separated  by  CLEAN_NKEEP
        components. If th

        IF  CLEAN_NKEEP  is 0, CLEAN will ignore this convergence criterium, and
        continue clean until the CLEAN_NITER, CLEAN_ARES or CLEAN_FRES  criteria
        indicate to stop.

        With  CLEAN_NKEEP  >  0,  CLEAN  will explore the stability of the total
        clean flux over the last CLEAN_NKEEP  iterations. For a positive  (resp.
        negative)  source, if the Clean flux becomes smaller (resp. larger) than
        the Clean flux CLEAN_NKEEP iterations earlier, CLEAN will stop.

        Using CLEAN_NKEEP about 70 is a reasonable value.   Some  special  cases
        (faint extended sources) may require larger values of CLEAN_NKEEP.