Specifies when to stop iterating MAPTOL_RATE
"
maptol"
) con sometimes settle down to a constant value, and thus never
drop to the target "
maptol"
value. This may be the case for instance, if every iteration adds a fixed
error map onto the current astronomical signal (see parameter "
epsin"
). Specifying a value for "
maptol_rate"
causes the iterative loop to be left if the normalised mean change seems to settle down to
a fix value. The supplied value for "
maptol_rate"
should be a fraction in the range 0.0 to
1.0, and gives the minimum required fractional change in "
normalised mean change"
between iteration. If the actual value falls below this minimum value, the iterative loop is left.
[undef
]