The  user can control the algorithm through SIC variables. Values
of  those  variables  can  be  checked  through   either   "INPUT
UV__MAP|CLEAN|UVALL" or "EXAMINE
 VARIABLE".  New  values can be given using "LET VARIABLE value".
For ease of use, and whenever it is possible, a sensible value of
each parameter will automatically be computed from the context if
the value of the corresponding variable is  set  to  its  default
value, i.e. zero value and empty string. A few variables are ini-
tialized to "reasonable" values.

























































