next up previous contents index
Next: UV_PREVIEW /BROWSE Up: ADVANCED Language Internal Help Previous: UV_MOSAIC SPLIT   Contents   Index


UV_PREVIEW

        [ADVANCED\]UVPREVIEW  [TAPER Ntaper] [CLIP Threshold] [HISTO Nhisto]
      [SMOOTH Nsmooth] [/BROWSE [Ataper]] [/FILE UvData.uvt [Drop]]

    A fast previewer to figure out if there is signal and what is its  spec-
    tral  shape.  The command attempts to find out the line free regions and
    to estimate a continuum region.

    The output of UV_PREVIEW can be used  for  further  processing  commands
    (UV_BASELINE and UV_FILTER, UV_SPLIT, SPECIFY, etc...)

    If  a  catalog  is defined (see HELP CATALOG), it will also display line
    identification (red for detected ones, blue for the others).

      The behaviour is controlled by 4 parameters than can  be  set  through
    the "KEY Value" optional argument pairs. These are
      TAPER   Ntaper    : number of scale sizes  (default 4)
      CLIP    Threshold : Clipping level in Sigma (default 3.5)
      SMOOTH  Nsmooth   : Number of spectral smoothing (default 3)
      HISTO   Nhisto    : Size of histogram
    These  values  are "sticky": they remain valid until further change, and
    they can be listed by
        UV_PREVIEW ?


Subsections

Gildas manager 2023-06-01