... spectrum . ... mn : main program, wh : subroutine WHOLE, in : subroutine INTEG and SFLUX, op : continuous opacities, ln : line opacities, at : atomic data, md : model atmosphere, ou : output, ot : other. ... This variable is set whenever a model atmosphere is read in, so that the default is whatever was used to compute the original model atmosphere. ... Default = 1 . ... As well as reading in the model, ionisation fractions and other depth-dependent quantities are also computed at this stage. ...