[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).
Gildas manager
2023-06-01