Content-type: text/html Manpage of calib


Section: User Commands (1)
Index Return to Main Contents


calib - Display raw calibration data with user interaction  






CALIB is a MIRIAD task which displays the raw calibration data and optionally a fit. Calib reads the data and fit from a cal file and displays the result visually. The user has the option to view the amplitudes, the phases, or the sums and difference of the phases in the two sidebands. The fit is displayed as a line over the points, and all the axes are labeled, with ticks. The user may interactively pick different plots to zoom on, and can mark individual points as good or bad. Breakpoints in time can be added and deleted as well. A new polynomial fits can also be added interactively.

Commands in cursor mode are:

  d/D -- flag the nearest point as bad (uppercase only one band)
  a/A -- flag the nearest point as good (uppercase only one band)
  x   -- zoom/unzoom toggle on the current column
  y   -- zoom/unzoom toggle on the current row
  z   -- zoom/unzoom toggle on the current plot
  b/B -- insert breakpoint (uppercase only one band)
  c/C -- delete breakpoint (uppercase only one band)
  0-9 -- order of new fit on current row (U or L)
  ma  -- change mode to amplitudes
  mp  -- change mode to regular phases (U and L)
  md  -- change mode to phase difference and average
  q   -- quit (no save)
  e   -- exit (save flags, breakpoints and fits if modifications done)
  ?   -- this help and redraw screen


The calibration data set. No default.
Source names to be selected. Default is all sources selected.
Use flags for scaling? If set to false, all points are selected for viewing, including the ones previously flagged bad. Default: true
Work on 'amplitude', 'phase', or 'difs'. Default: amplitude
Use closure? If set to true, closure will be applied to the phases, Also note that in closure mode breakpoints must be at the same time accross baselines. Default: false. Note: *** this mode is under development ***
Taver consists of two numbers, TGAP and TTOT, both in minutes; they are used for vector averaging. If the time interval between any two successive data points is greater than TGAP, or if the total time between the first data point in a vector average and any succeeding data point exceeds TTOT, then a new vector average is started. The time-(X)-axis on top of your plot should be labeled in (UT) hours-minutes and seconds. The bottom is labelled in fractional days, offset from the date in the plot-header. Default: 0.0,1000.0 (no vector averaging)
This keyword is used to specify the plotting device. It uses the normal PGPLOT format of




Usually there exists a default file name or device name. The part after the slash gives the plotter type. Examples of the type are:

  xs    X-windows output. This window is resizeable and
        persistent. Prepending a number allows you to use multiple
        windows, e.g. 1/xs, 2/xs etc.
  xd    X-windows output. A transient window that disappears
        when your task exists.
  ps    Postscript (landscape mode).
  vps   Postscript (portrait mode).
  cps   Color postscript (landscape mode).
  gif   gif files. Only supported with g77, not gfortran.
  vcps  Color postscript (portrait mode).
  tek   Tektronix 4010 or equivalent.
  xterm Xterm window (better for simple plots over slow X links).

A `?' as device name generates a complete list of the recognized types (which will most likely vary from system to system).

Files created for hardcopy devices must be spooled to the printer separately. The command needed for this is site and device specific. Default is "?"

Units to work in. Options are: K, K/Jy, Jy/K. Note: since CALAPPLY assumes Jy/K any other units are nice to look at, but produce badly calibrated files. Default: Jy/K.
If supplied, the amplitude scale is fixed from 0 to ampmax, otherwise autoscaling is done. Default is autoscaling.




This document was created by man2html, using the manual pages.
Time: 18:35:38 GMT, July 05, 2011