This parameter controls the maximum number of spatial zones used in a calculation, only in the case where the Courant condition step is larger than the size of the slab. That is, the step size is calculated as:
where emult is defined below, and
is the maximum opacity from the
previous step calculation.
is only calculated from energies where
the optical depth to the illuminated face of the cloud is less than taumax, where
taumax is defined below. The default value for nsteps is 2.