Use VDAT
********

Launch VDAT
===========

Launching ``VDAT`` is easy::

  vdat  [-h] [--rawdir RAWDIR] vdat_setting.cfg

The configuration file ``vdat_setting.cfg``, together with any other file
needed by ``VDAT``, is shipped with the code and can be retrieved using the
``vdat_config`` command :doc:`described here <executables>`.

The value of ``--rawdir`` should be the name of a directory containing fits
files organized according VIRUS standards as in :ref:`raw_dir`. If provided the
fits files in ``RAWDIR`` are symlinked into a ``redux`` directory, defined in
the ``vdat_setting.cfg`` file, described in :ref:`redux_dir`.

If the ``--rawdir`` is not provided, it will look for the ``redux`` directory.
It it doesn't exist, the execution aborts.

.. warning::

  Currently this is the only way to feed data into VDAT.

The GUI
=======

Here we describe the GUI with screen shots and what it's possible to do