SET ATM

        [ASTRO\]SET ATM Version

    Set the ATM version to be used by the ATMOSPHERE command.  Choices are:
    - OLD or 1985 select the old ATM model, in use at IRAM since circa 1985.
    - 2003 select the 2003 version of the ATM model, developed by Juan Pardo
      in ISM in Madrid. For this, the  corresponding  ATM  library  must  be
      available on your system.
    - NEW  or 2009 select the 2009 ATM model, developed by Juan Pardo in ISM
      in Madrid. For this, the ATM library must have been compiled  together
      with Gildas (implicit if a C++ compiler was found).

    Default  is  2009.  You have to switch explicitly to 1985 or 2003 if the
    2009 version is not available on your system.