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The SHOW command

In general, command magentaSHOW allows a per-plane display of any SIC 3-D image variable, with contours overlaid on bitmap for each plane: e.g.
SHOW DIRTY 30 -30 will display contour and bitmaps of each channel of the DIRTY image, starting for channel 30 and ending 30 channels before the last one. See Fig.[*] for an example.

Figure: The magentaSHOW CLEAN output.
Image show
Command magentaSHOW /SIDE (and also command magentaSHOW when the blueSHOW_SIDE variable is set to YES) will call the cursor, so that the pixel values at the cursor position are displayed in the <VSIDE panel.

A direct use on Gildas 3-D image or UV data files is also possible: magentaSHOW Filename.ext will directly display the file if possible. It also works for simple FITS files in which the data array is in the HDU.

For uv data, magentaSHOW UV can plot visibility values such as amplitude as a function of time, baseline length, etc..., again on a per channel basis. Fit results can be overlaid, as shown Fig.[*]

Figure: The magentaSHOW UV output with results from magentaUV_FIT command overlaid.
Image showuv-fit

magentaSHOW can also display more specific issues:

  • magentaSHOW CCT will display the cumulative flux as a function of number of clean components (Fig.[*]).
    Figure: The magentaSHOW CCT output.
    Image show-cct
  • magentaSHOW COVERAGE will display the uv coverage (it assumes there is only one, and not one per channel, because the display time is long, see Fig.[*])
    Figure: The magentaSHOW COVERAGE output. Colors indicate different dates.
    Image coverage
  • magentaSHOW SELFCAL behaves as magentaSELFCAL SHOW
  • magentaSHOW FIELDS displays the fields of a Mosaic.
  • magentaSHOW NOISE displays the histogram of the intensity distribution for each channel, estimating the noise by fitting a Gaussian in these histograms (see Fig.[*]).
    Figure: The magentaSHOW NOISE output.
    Image show-noise
  • magentaSHOW UV_FIT displays the magentaUV_FIT results for spectral line data.
    Figure: The magentaSHOW UV_FIT output.
    Image show-uv_fit

magentaSHOW recognizes many other keywords. See magentaHELP SHOW for further details.


next up previous contents index
Next: the VIEW command Up: The red VIEWER program Previous: The red VIEWER program   Contents   Index
Gildas manager 2023-06-01