1 UV_SHORT
        UV_SHORT

    This task prepares a UV table of short spacings from a  single-dish map.
    This  table  may  later  be  merged  to an interferometer UV table.  The
    operations performed are:
      -  Fourier transform of the single dish map
      -  Division by the Fourier transform of the single dish  beam,  up  to
        a maximum spacing (SD_DIAM$, in meters)
      -  Inverse Fourier transform to  the  image  plane
      -   Multiplication  of  the   image   by  the  primary  beam  of   the
        interferometer elements
      -  Fourier transform back to the UV plane.
      -  Creation of the UV table, with a given  weight  SD_WEIGTH$  and  an
        appropriate calibration factor to Janskys SD_FACTOR$

    Both the single-dish and the interferometer antennas are assumed to have
    gaussian beams (SD_BEAM$ and IP_BEAM$, in radians).
2 MAP_NAME$

    This the name of the input single dish map.

2 UV_TABLE$

    This the name of the created output UV table.

2 DO_SINGLE$

    Logical value, should be .true.  except for test purposes.

2 SD_DIAM$

    Useful diameter of the single dish, in meters.  No spacing  higher  than
    SD_DIAM$ is generated.

2 SD_BEAM$

Half-power beam width of the single dish antenna, in radians.  The  beam  is
    assumed to be gaussian.

2 SD_WEIGHT$

    Total weight of the generated visibilities.  Should be  10**-6/sigma**2,
    where  sigma  is  the  r.m.s.  of the zero-spacing value (total flux) in
    janskys.

2 SD_FACTOR$

    Multiplicative calibration factor; it is used to convert from the single
    dish map units (e.g., main-beam brightness temperature) to janskys.
2 DO_PRIMARY$

    Logical value, should be .true.  except for test purposes.

2 IP_BEAM$

    Half-power beam width of the interferometer antennas, in  radians.   The
    beam is assumed to be gaussian.
1 END