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.
Gildas manager
2023-06-01