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Comparison between a forward simulation and surface observations
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If you are not using ready-made :bash:`monitor.nc` files specified in :doc:`obsvect<obsvect>`, the simplest option is to use the :bash:`datavect` components dedicated to observations.

For in-situ data, the :bash:`concs` component allows you to specify monitor files for various parameters:

        .. code-block:: yaml

          concs:
            parameters: 
              S1 :
               dir: directory_where_monitor_files_for_S1_are located
               file: monitor_file_for_one_month_%Y%M.nc  
      


Other sets of transformations can also be specified by the user in :bash:`obsoperators` with a :bash:`transform_pipe` XXX more tutos later on this, useful for transformation which are not ready-made in the codeXXXXXX

XXX from raw files = measurements? XXXX


XX placement sur la verticale??XXX
   

XXXXXXX faire tuto ajout nouvelle lecture d'obs?XXXX