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FITS WRITE

        LAS\FITS  WRITE  File[.fits]  /MODE  SPECTRUM|INDEX  [/BITS   Nbits]
    [/CHECK]

    WRITE  the File.fits FITS file from the CLASS Data Format. The resulting
    FITS file is a binary table (BINTABLE) with columns  of  parameters  and
    channel  intensities  (dedicated CLASS-FITS format, see CLASS documenta-
    tion for details). In order to produce a data cube, the  commands  TABLE
    and  XY_MAP  must  be used first. Then the resulting GDF cube can be ex-
    ported with the command V\FITS.

    /MODE is a mandatory option which can take the following values as argu-
    ment:
    SPECTRUM a  simple  FITS  file is written from the current R spectrum in
             memory is written. The number of bits per intensity value  used
             when  writing the FITS file may be controlled through the /BITS
             optional argument. It can be: 16 or I*2 (2 bytes  integer),  32
             or  I*4 (4 bytes integer) or -32 or R*4 (4 bytes real). Default
             is 32.
    INDEX    a FITS BINTABLE is written from all the spectra in current  in-
             dex. The user MUST make sure that all index spectra are consis-
             tent (same source, same line, same frequency setup,  ...).  The
             intensity  values  (and  irregularly  sampled X axis values, if
             any) are always written as 4 bytes real.

    The default mode and number of bits can also be  specified  through  the
    commands:
      SET FITS MODE SPECTRUM|INDEX
      SET FITS BITS Nbits
    The option /CHECK will print the FITS HEADER on the terminal.


Gildas manager 2024-03-29