No input needed for nested domains.
All static and meteorological data are interpolated from the coarse grid to the nested grids.
Advantage: Nested domains may start at different times.
Disadvantage: Nested domains do not benefit from high resolution static fields.
Namelist parameters:
     input_from_file = .true.,.false.,

Program flow:
NOTE: Up to (A) the program flow for a single domain run and a nested domain run, with one input file, is identical.