This is the minimal fraction of the peak flux in the dirty map that the
program will consider as significant. Alternatively, an absolute
threshold can be specified using CLEAN_ARES. Once this level has been
reached the program stops subtracting, and starts the restoration phase.
This parameter is normalized to 1 (neither in % nor in db). It should
usually be of the order of magnitude of the inverse of the expected dy-
namic range of the intensity.
If 0, CLEAN_ARES will be used instead. If all of CLEAN_NITER, CLEAN_ARES
and CLEAN_FRES are 0, an absolute residual equal to the noise level will
be used for CLEAN_ARES.
Short form is FRES.
Gildas manager
2023-06-01