1 UV_ZERO
        UV_ZERO

    This task appends  zero-spacing  (single-dish)  data  (spectrum   and/or
    continuum  flux ) to an existing UV table.  If zero-spacing data already
    exists in the UV table, they are replaced by the  new  data.   The  zero
    spacing  spectrum is a GILDAS table, which should be created in CLASS by
    the command GREG.  Additional inputs are:  the weight  to  be  used,  an
    amplitude  calibration  factor  affecting  the spectrum, and a continuum
    flux.

    The single-dish spectrum is resampled   to   the   UV   table   spectral
    characteristics.
2 UV_TABLE$
        TASK\FILE "UV table" UV_TABLE$

    This the name of UV table (input and output)

2 FLUX$
TASK\REAL "Zero spacing continuum flux" FLUX$

    The single-dish continuum flux (in janskys) to used for all channels.

2 DO_SPECTRUM$
        TASK\LOGICAL "Include spectral data" DO_SPECTRUM$

    A logical value.
      -  If true, GREG_TABLE$ is used,  and   the   resulting   zero-spacing
        visibility is :  spectrum * FACTOR$ + FLUX$
      -  If false, the zero-spacing visibility is FLUX$ for all channels

2 GREG_TABLE$
        TASK\FILE "GREG table from CLASS" GREG_TABLE$

    This the name of the single dish spectrum (a GILDAS table created by the
    command GREG in CLASS)
2 WEIGHT$
        TASK\REAL "Zero spacing weight" WEIGHT$

    The weight of the zero spacing (typically 1**-6/sigma**2, where sigma is
    the rms in janskys)
2 FACTOR$
        TASK\REAL "Zero spacing calibration factor" FACTOR$

    A multiplicative calibration factor, used to convert from  the  spectrum
    units (e.g., main-beam brightness temperature) to janskys.

1 END