UV_MERGE /MODE

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UV_MERGE /MODE

              [ADVANCED]\UV_MERGE OutFile /FILES In1 In2 ... Inn
            /MODE [LINE|STACK|CONCATENATE|CONTINUUM [Index [Frequency]]
            [/SCALES F1 ... Fn] [/WEIGHTS W1 ... Wn ]

          Specify the merging mode.  The default mode is LINE.

          In  LINE  mode, for spectral line UV tables (more than 1 channel), the
        default is that the spectral lines must have the  same  Rest  Frequency.
        Resampling  (in  velocity, which is then identical in frequency) is done
        on the grid of the first UV table In1.

          In mode CONCATENATE, a common spectral axis encompassing those of  the
        initial  UV  tables  is defined, and all UV tables are resampled on this
        one.

          In mode STACK, the Rest Frequencies can  differ.  Resampling  is  then
        done in velocity, and the (u,v) coordinates scaled as the Rest Frequency
        ratios to conserve the angular resolution of the data.  The /SCALES  and
        /WEIGHT  factors  can  be used to incorporate prior knowledge of the ex-
        pected line rations to optimize S/N.

          For continuum UV tables (1 channel or option /MODE CONTINUUM), a spec-
        tral  index  can  be specified, as well as a reference Frequency.  (u,v)
        coordinates are scaled appropriately, as well as  Flux  and  Weights  in
        this  case.  The /SCALES and /WEIGHTS factors are applied on top of this
        automatic spectral index scaling. Input Line UV Tables  are  treated  as
        multi-frequency Continuum ones (as in UV_CONTINUUM command).