5.3.13 Input/Output Control

With this group of parameters the start model and the type and amount of output can be specified. Parameters with the suffix ``_start'' describe the initial model, these with suffix ``_end'' the corresponding final model. Additional data can be written into the file described by the parameters with suffix ``_full'' (full 2D/3D model dumps, huge, see Sect. 5.1) or into the file described by the parameters with suffix ``_mean'' (additional information, see Sect. 5.2).

• real dtime_out_full:
  The interval between datasets in the full file can be set e.g. with
  real dtime_out_full f=E15.8 b=4 n='Output time step'                 u=s &
    c0='dtime_out_full < 0.0 => no output' &
    c1='dtime_out_full = 0.0 => output every time step'
   2.0E+06
  
  Allowed values are
  • $<$ 0.0: No output to this file
  • $=$ 0.0: Output at every time step. Attention: This can produce HUGE files in no time.
  • $>$ 0.0: Output to full file approximately every dtime_out_full seconds.
  Some examples: The ``classical'' value for this output for simulations of solar granulation is 20sec. To save memory this can be increased to 30sec. But in this case chromospheric shocks are very badly resolved. To cover them properly, a sampling rate of 10sec or below is needed.

• real dtime_out_mean:
  The interval between datasets in the mean file can be set e.g. with
  real dtime_out_mean f=E15.8 b=4 n='Output time step'                 u=s &
    c0='dtime_out_mean<0.0 => no output'
   0.5E+06
  
  Allowed values are
  • $<$ 0.0: No output to this file
  • $=$ 0.0: Output at every time step.
  • $>$ 0.0: Output to mean file approximately every dtime_out_mean seconds.
  Because the size of one mean dataset is much smaller than one full dataset, it is possible to request a higher sampling rate without using too much disk space.

• character infile_start:
  The filename of the initial model is specified e.g. with
  character infile_start f=A80 b=80 n='File name of start model'
  rhd.sta
  
  Default is rhd.sta (for a parameter file used within a batch system). Typical filenames are st35gm04n01_01.sta or gt57g44n20dz.end.

• character outfile_end:
  The file name for the final model can be specified with e.g.
  character outfile_end f=A80 b=80 n='Output file name'
  rhd.end
  
  The default is rhd.end. Leaving it empty means that no final model is written. This of course inhibits follow-up simulations but can be useful to save time and disk space for some tests.

• character outfile_full:
  The name of the file for the output of additional full models at regular intervals (see Sect. 5.1) can be given with e.g.
  character outfile_full f=A80 b=80 n='Output file name'
  rhd.full
  
  Leaving it empty means that no file of this type is written.

• character outfile_mean:
  The name of the file for the output of additional information (average stratification, mean fluxes, surface intensities) at regular intervals (see Sect. 5.2) can be specified with e.g.
  character outfile_mean f=A80 b=80 n='Output file name'
  rhd.mean
  
  Leaving it empty means that no file of this type is written.

• character outform_end:
  The format (see Sect. 4.3.1) of the final model files can be chosen e.g. with
  character outform_end f=A80 b=80 n='Output file format' &
    c0='formatted/unformatted'
  unformatted
  
  Allowed values are
  • unformatted: (default) fast compact (possibly machine-dependent) output: strongly recommended
  • formatted: slow (machine-independent) output, big files

• character outconv_end:
  The conversion type (see Sect. 4.3.1) of the final model files can be specified e.g. with
  character outconv_end f=A80 b=80 n='Output file conversion' &
    c0='ieee_4/ieee_8/crayxmp_8/native'
  ieee_4
  
  The allowed values depend on the machine. Leaving this field empty means that the default is chosen that is build into the local UIO module. If the type ieee_4 is supported (which is always the case, so far) it should be chosen.

• character outform_full:
  The format (see Sect. 4.3.1) of the full model files can be chosen e.g. with
  character outform_full f=A80 b=80 n='Output file format' &
    c0='formatted/unformatted'
  unformatted
  
  Allowed values are
  • unformatted: (default) fast compact (possibly machine-dependent) output: strongly recommended
  • formatted: slow (machine-independent) output, big files

• character outconv_full:
  The conversion type (see Sect. 4.3.1) of the full model files can be specified e.g. with
  character outconv_full f=A80 b=80 n='Output file conversion' &
    c0='ieee_4/ieee_8/crayxmp_8/native'
  ieee_4
  
  The allowed values depend on the machine. Leaving this field empty means that the default is chosen that is build into the local UIO module. If the type ieee_4 is supported (which is always the case, so far) it should be chosen.

• character outform_mean:
  The format (see Sect. 4.3.1) of the additional data files can be chosen e.g. with
  character outform_mean f=A80 b=80 n='Output file format' &
    c0='formatted/unformatted'
  unformatted
  
  Allowed values are
  • unformatted: (default) fast compact (possibly machine-dependent) output: strongly recommended
  • formatted: slow (machine-independent) output, big files

• character outconv_mean:
  The conversion type (see Sect. 4.3.1) of the additional data files can be specified e.g. with
  character outconv_mean f=A80 b=80 n='Output file conversion' &
    c0='ieee_4/ieee_8/crayxmp_8/native'
  ieee_4
  
  The allowed values depend on the machine. Leaving this field empty means that the default is chosen that is build into the local UIO module. If the type ieee_4 is supported (which is always the case, so far) it should be chosen.