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LMV FAXIS

        ANALYSE\LMV frequency/velocity axis

    If your input file is a Gildas cube (3 dimensions) but it  has  no  fre-
    quency/velocity  axis  description  (as  found in the spectroscopic sec-
    tion), it can not be imported as spectra into Class.

    However, you can fix this by setting by yourself this description in the
    file. This can be achieved with Sic commands as follows:
      DEFINE IMAGE I mycube.lmv WRITE
      LET I%F_AXIS   ??   ! [    ] Freq/Velo axis (1, 2 or 3)
      LET I%LINE     "SOMELINENAME"
      LET I%FREQRES  ??   ! [MHz ] Channel spacing
      LET I%FREQOFF  0.0  ! [MHz ] Should be 0
      LET I%RESTFRE  ??   ! [MHz ] Rest frequency
      LET I%VELRES   ??   ! [km/s] Most likely -C*I%FREQRES/I%RESTFRE
      LET I%VELOFF   ??   ! [km/s] Velocity at reference channel I%CONVERT[1,I%F
      LET I%DOPPLER  ??   ! [    ] Doppler factor
      LET I%VTYPE    ??   ! [code] Velocity type (see codes in SIC%CODE%VELO%)
      LET I%SPEC     14   ! Section size => non-zero enables the section
      DELETE /VARIABLE I  ! Save the modifications in the file

    If your input cube is a FITS cube, you can either:
      - edit  the  FITS  with  you favorite FITS editor, and add the missing
        keywords, or
      - convert the FITS to the Gildas Data Format:
          V\FITS mycube.fits TO mycube.lmv
        and follow the steps above.


Gildas manager 2015-03-19