CUBE

 

        ANALYSE\CUBE Filename [MATH_EXPRESSION] [/CHANNEL Cmin Cmax]  [/STEP
    Stepx Stepy]

    This command builds either a data-cube or a  2-dimensional  map  at  the
    GILDAS  format  from the current index of scans. It is up to the user to
    ensure that the current index concerns a  single  source  and  a  single
    line,  observed  with  a  unique  spectral  resolution, with all spectra
    centered at the same velocity.

    If 'MATH_EXPRESSION' is present in the command line,  ANALYSE\CUBE  will
    make  a  2-D  map  of  (the  result  of Math_expression applied for each
    spectrum), for each spectra position. This is particulary handy when one
    use  the  SIC  variables  and  functions  (see HELP CUBE Functions, HELP
    LAS\SET VARIABLE and try  the  command  SIC\EXAMINE  /FUNCTION)  in  the
    Math_expression. In that case, The data cube axis types will be
        RA or L
        DEC or B, depending on the type of offsets

    In the other case (i.e., a real data cube of channels values), The  data
    cube axis types will be
        Velocity or Channels or Rest or Image frequencies, depending on  the
    current X unit.
        RA or L
        DEC or B, depending on the type of offsets

    Option /CHANNEL can be used to limit the part of the spectra  that  will
    be included in the cube (no use if you plot a Math_expression).

    Option /STEP can always be used to force the step size of the cube.

    The resulting 2 or 3D data cube can then be processed as a  whole  using
    the  GILDAS  (Grenoble  Image  and  Line Data Analysis System) software.
    GILDAS includes tasks to transpose, reinterpolate, change the projection
    systems,  make  overlays with the IRAS point sources, contours and so on
    from data cubes. Call GRAPHIC at system level and then type EXPLAIN  for
    more information on GILDAS tasks.

• CUBE FUNCTIONS