1 FITS_GILDAS Simple FITS to GILDAS data format translator
        FITS_GILDAS

    Converts  a  disk FITS image in a GILDAS image.  A disk FITS image is an
    2880  bytes  per  block  file  conforming  to  FITS standard for the in‐
    formation  written  in  the  blocks.   Such  disk  FITS  images  can  be
    produced  by  other  packages (e.g.  AIPS).  This task is intended for a
    single image.  For many  images,  or  tape  FITS,  use  the  interactive
    program GFITS.

    Images are assumed to have at most  4  axis.  FITS_GILDAS  also  handles
    UVFIT data.

    Conversion for FITS to GILDAS data format is not necessary: "on‐the‐fly"
    conversion of FITS files into GILDAS images is  automatically  attempted
    by  all  GILDAS  programs and tasks. This conversion creates a temporary
    GILDAS image (of extension .fits.gdf) which  is  normally  deleted  upon
    completion.  However, this "on‐the‐fly" conversion will fail if the FITS
    keywords are highly non‐standard.

2 FITS$
        TASK\FILE "Input FITS file" FITS$

    Input disk FITS file name.
2 OUT$
        TASK\FILE "Output Gildas Image" OUT$

    Output GILDAS image name
2 STYLE$
        TASK\CHARACTER "Style of FITS image" STYLE$

    The "Style" of FITS files.  Many  supposedly  standard  FITS  files have
    small  (although  non‐fatal) deviations from the (uncomplete) FITS stan‐
    dard.  The STYLE$ keyword is used to  correct   for   some   of   these.
    Available styles are
      ‐ STANDARD
      ‐  CPC   (IRAS  Chopped  Photometric  Channel)  :   uses  a  non‐stan‐
        dard definition of axes, and a bizarre quasi‐projection system.
      ‐ SPLINE (IRAS spline maps) :  those maps have an incorrect flux  den‐
        sity  scale.   Correction factor applied when this keyword is speci‐
        fied.

2 BLC$
        TASK\INTEGER "Bottom left corner (all 0 ==> full image)" BLC$[4]

    Define the bottom  left  corner  of  the  input  FITS  file  to  be con‐
    sidered.   BLC  is  an array of dimension 4, since images are assumed to
    have at most 4‐D.  0 means 1.
2 TRC$
        TASK\INTEGER "Top right corner (all 0 ==> full image)" TRC$[4]

    Define  the  top  right  corner  of  the  input  FITS  file  to  be con‐
    sidered.  0 means use the actual dimension.
1 ENDOFHELP












