Content-type: text/html Manpage of uvspec

uvspec

Section: User Commands (1)
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NAME

uvspec - Plot averaged spectra of a visibility dataset.  

PERSON RESPONSIBLE

rjs  

CATEGORIES

uv analysis  

DESCRIPTION

UVSPEC plots averaged spectra of a visibility dataset. Averaging can be in both time and frequency  

PARAMETERS

vis
The name of the input uv data sets. Several can be given (wild cards are supported). No default.
select
The normal uv selection commands. The default is plot everything.
line
The normal uv linetype in the form:
  line,nchan,start,width,step
The default is all channels (or all wide channels if there are no spectral channels).
stokes
The Stokes/polarization types to be plotted. The default is to plot those polarizations present in the input files.
interval
Time averaging interval, in minutes. The default is 0 (i.e. no averaging).
hann
Hanning smoothing width (an odd integer). Smoothing is applied after averaging. Default is 1 (no Hanning smoothing).
offset
An offset (in arcsec) to shift the data. Positive values result in the data center being shifted to the North and East. Two values should be given, being the shift in the RA and DEC directions. The default is 0,0 (i.e. no shift).
options
This gives extra processing options. Several options can be given, each separated by commas. They may be abbreviated to the minimum needed to avoid ambiguity. Possible options are:
   'nocal'       Do not apply the gains file. By default, UVSPEC
                 applies the gains file in copying the data.
   'nopass'      Do not apply bandpass corrections. By default,
                 UVSPEC corrects for the bandpass shape if the
                 required information is available.
   'nopol'       Do not apply polarizatiopn corrections. By default
                 UVSPEC corrects for polarization corss-talk.
   'ampscalar'   When plotting amplitude, this causes it to perform
                 scalar averaging. By default it does vector averaging.
   'rms'         When plotting amplitude, this causes it to plot
                 the rms amplitude. by default it does vector averaging.
   'nobase'      Plot all the baselines on one plot.
   'avall'       Average all the baselines together before plotting.
   'dots'        Plot phases with dots instead of filled circles.
   'flagged'     Plot flagged data instead of unflagged data. The
                 default is to plot only unflagged data.
   'all'         Plot both flagged and unflagged data.
axis
This gives two strings, which determine the X and Y axes of each plot. The values can be abbreviated to uniqueness. Possible values for the X axis are:
   channel       X-axis is channel number.
   frequency     X-axis is the sky frequency, in GHz.
   dfrequency    X-axis is the Doppler-corrected frequency, in GHz.
   velocity      X-axis is velocity in radio convention, in km/sec.
   felocity      X-axis is velocity in optical convention, in km/sec.
   lag           X-axis is lag number.
Possible values for the Y axis are:
   amplitude     Plot amplitude.
   phase         Plot phase.
   real          Plot real part of the data.
   imaginary     Plot imaginary part of the data.
The default is axis=channel,amplitude.
yrange
The min and max range along the y axis of the plots. The default is to autoscale.
device
PGPLOT plot device/type. No default.
nxy
Number of plots in the x and y directions. The default is determined from the number of antennae in the data-sets.
log
Log file into which the spectra are dumped in the order in which they are plotted. Really only useful if your plot is quite simple.


 

Index

NAME
PERSON RESPONSIBLE
CATEGORIES
DESCRIPTION
PARAMETERS

This document was created by man2html, using the manual pages.
Time: 18:35:39 GMT, July 05, 2011