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Read UV data from File. File can be in GILDAS or UVFITS format.
The STOKES keyword is ignored for GILDAS format.
For File in UVFITS format, the optional keyword STOKES specifies how the Stokes parameters are handled. If present, all stokes parameters are stored.
If the STOKES keyword is not mentionned, READ preserves all Stokes parameters when 4 Stokes are in the data, but automatically reduces to unpolarized data (Stokes NONE, see HELP STOKES) when only 1 or 2 Stokes parameter are present.
UVFITS format files can also be converted to UV Tables in the GILDAS data format using the "@ fits_to_uvt" script, which ignores Stokes parameters by default (only retaining Stokes I or equivalent).