CLEAN_STOP
Keywords: imager

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CLEAN_STOP

          CLEAN_STOP  is  a  2-elements  character string that defines the Clean
        stopping criterium.

        If  CLEAN_STOP  is  not  empty,  it  supersedes  the  older  CLEAN_ARES,
        CLEAN_FRES  and  CLEAN_NITER variables (and their even older ARES, FRES,
        NITER historical equivalent), and even the CLEAN_NKEEP variable, provid-
        ing a more flexible syntax to specify the stopping criterium.

        The general syntax is
          LET CLEAN_STOP Value [Unit]
          LET CLEAN_STOP   1 Sigma     Indicates stopping at 1 times the noise level
          LET CLEAN_STOP   10 mJy      Indicates stopping at 0.01 Jy/beam
          LET CLEAN_STOP   1  %        Indicates stopping at 0.01 of the peak value
          LET CLEAN_STOP   100 Iterations  Set the max number of iterations to 100
          LET CLEAN_STOP   20 Stop     Indicates convergence is tested over 20 itera
        If  no  unit is specified, the last specified unit is used instead. Sub-
        units (mJy, Jy, milliJy, microJy, etc...)  are allowed for convenience.

        CLEAN_STOP overwrites the previously specified  CLEAN_ARES,  CLEAN_FRES,
        CLEAN_NITER and CLEAN_NKEEP values when (and only when) CLEAN is execut-
        ed.

        2 CLEAN_TRUNCATE

          Fraction of peak response of the primary beams  coverage  under  which
        the Sky brightness image is blanked in a Mosaic deconvolution.

          It is also used as a default truncation value in the PRIMARY command.

        The default is 0.2.