Grouping GCP emission files by category
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Prior to reprojecting emissions to one's model inputs, it is possible to group
emission categories into larger categories to reduce the number of unknown
to solve in the inversion.

The Yaml below generates GCP emission files as groups of original GCP files.
The groups are:

    - bioff: biofuels + biomass burning
    - ff: coal + oilgasind
    - enteric: livestock + rice + waste
    - biogenic: wetlands + freshwaters + termites

Files are generated in the folder :bash:`obsoperator/fwd_0000/%Y-%m-%d_00-00/`.

.. container:: toggle

  .. literalinclude:: yml/gcp-groups.yml
      :linenos:
      :language: yaml