18.7.30      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, providing 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 iterations

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 executed.