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.
Gildas manager
2023-06-01