new parameters to make available

[aakash10gupta]

Here, I'm listing a few cases where the availability of new parameters will be useful for customizing inversions -

• preprocessing
  In some cases, the user might need to use their seismograms in their original form without any kind of preprocessing. For instance when the user has already preprocessed their seismograms outside of seisflows. Providing a flag type parameter that can turn on and off ALL preprocessing options will be very helpful in this regard. I'm guessing there will be some consideration needed for the flag to work irrespective of the preprocess module chosen during configuration.

• windowing
  In some cases, the user might need to use whole lengths of their seismograms for misfit assessments without any window selection, i.e. the whole seismogram is a single window. Providing a flag type parameter that can turn on and off ALL windowing processes will be very helpful in this regard. I'm guessing the windowing is presently undertaken only when preprocess: pyaflowa is chosen during configuration, and hence the proposed flag parameter can only get populated for this preprocess module case.

• smoothing
  SPECFEM/specfem3d now offers two options for smoothing. For solver: specfem3d, seisflows currently uses the old xsmooth_sem as the default and the only option for smoothing, but it will be good to have a parameter in seisflows which provides an option to choose between that and the new xsmooth_sem_pde option.

[aakash10gupta]

I'm also noticing that the parameter unit_output is missing when preprocess: pyaflowa is used for configuration.

[bch0w]

Smoothing was addressed in #230, use parameter smooth_type=='pde' to access PDE smoothing in SPECFEM3D_Cartesian. Preprocessing and windowing will be addressed in future updates.

• Allow toggling preprocess (anything after data reading) on/off
• Allow toggling Pyaflowa windowing on/off to use the whole waveform rather than window
• Bug: Pyaflowa does not use parameter unit_output even though it is an input argument