xx, yy, xy, yx, i, q, u, v, rr, ll, rl, lrDefault is all polarizations or Stokes parameters present
time [time in DD HH MM SS.S format] dtime [time in decimal days format] ytime [time in decimal years format] amplitude, real, imag [natural units; Jy] phase [degrees] uu, vv [u & v in klambda] uc, vc [u,& v, -u & -v in klambda] uvdistance [sqrt(u**2+v**2)] uvangle [uv pos'n angle clockwise from v axis] hangle [hour angle in HH MM SS.S] dhangle [hour angle in decimal hours] lst [local sidereal time in decimal hr] az [azimuth in degrees] el [elevation in degrees] airmass [airmass=1/sin(el)] jyperk [system gain, in Jy/K] rms [theoretical visibility noise rms, in flux units] freq [frequency, in GHz] parang [parallactic angle in degrees]
NOTE: parang is the true parallactic angle of the source, which can be quite different from the angle between source and antenna feed (Miriad variable chi).
Defaults are axis=time,amp (x and y axes).
If axis = uu, vv, or uvdistance [kilo-lambda; 2 values] unless OPTIONS=NANOSEC; then nanoseconds] If axis = uvangle [degrees; 2 values] If axis = time [dd,hh,mm,ss.s; 8 values] If axis = dtime [decimal days; 2 values] If axis = amplitude, real, imag [natural units; 2 values] If axis = phase [degrees; 2 values] If axis = hangle [hh,mm,ss.s; 6 values] If axis = dhangle [decimal hours; 2 values] If axis = parang [degrees; 2 values] If axis = az or el [degrees; 2 values] If axis = airmass [natural units; 2 values] If axis = jyperk [Jy/K; 2 values] If axis = rms [flux units; 2 values] If axis = lst [decimal hours; 2 values] If axis = freq [GHz; 2 values]
For axis types other than 'time' or 'hangle', one or other of the limits may be set with the other self-scaled by specifying the lower limit as 'min' and the upper as 'max' (or simply omitting it). For example,
self-scales the lower limit while pinning the upper limit to zero, whereas either of the following
set the lower limit to zero while self-scaling the upper limit.
Default is to self-scale both limits (see also OPTIONS=XIND).
nocal Do not apply the gain corrections nopol Do not apply the polarization leakage corrections nopass Do not apply the bandpass corrections
nofqav By default, uvplt averages together all channels from a visibility record before plotting. The nofqav option disables this, and causes individual channels to be plotted. Note that this option is not active when time averaging is invoked (frequency averaging is always done then).
nobase Plot all baselines on the same plot, otherwise each baseline is plotted on a separate sub-plot.
notitle Do not write any title on the plot. Probably most useful if plotting all baselines on the same plot (using the "nobase" option).
2pass Normally uvplt makes assumptions about what it is expecting to find in the data regarding polarizations and baselines. Under some conditions, uvplt may report that it has not allocated sufficient buffer space. This option instructs uvplt to make two passes through the data, the first to accumulate precise information on the contents of the selected data so that buffer space is optimally allocated.
scalar Do scalar (average amplitudes or phases) rather than vector (average real and imaginary) averaging. This is useful if the visibilities are uncalibrated & the phase is winding over the averaging interval & you would like an averaged amplitude. Scalar averaged phase is not very meaningful in general. avall If you are averaging in time, then average all data selected on each sub-plot together. E.g. all selected polarizations, and, if OPTIONS=NOBASE, all baselines as well. If you wish to average all the things on one subplot together but without temporal averaging, just set the averaging time to less than one integration. unwrap When plotting phase, try to unwrap it so that say, if one point is 179 deg and the next -179, they will be plotted as 179 and 181 deg. NOTE: Unwrapping noise can be VERY misleading.
rms Draw error bars (+/- 1 standard deviation) on the plot if averaging is invoked. mrms Draw error bars (+/- 1 standard deviation in the mean) on the plot if averaging is invoked. noerr The automatically worked out min and max plot limits will NOT include the ends of the error bars.
all Plot flagged and unflagged visibilties flagged Plot only flagged visibilities. The default is to plot only unflagged (good) visibilities. ALL overrides FLAGGED.
nanosec u and v are plotted in nano-seconds rather than k-lambda days The averaging interval is in days rather than minutes hours The averaging interval is in hours rather than minutes seconds The averaging time is in seconds rather than minutes
xind If the x-axis is self-scaled, then unless OPTIONS=NOBASE, setting XIND will cause each sub-plot to have the x-axis self-scaled independently. The default is that the x-range used is that which encompasses the ranges from all sub-plots. yind The equivalent for the y-axis
equal Plot x and y with equal scales. Useful only for plots like AXIS=UU,VV. Does not mean the plot will necessarily be square zero Plot the x=0 and y=0 lines
symbols Each file is plotted with a different plot symbol nocolour Each file is plotted with the same colour (white). By default and when there is only one polarization, each file has a separate colour. dots If time averaging is invoked, plot the data with dots rather than filled in circles. These plot much faster on hardcopy devices.
source Put the source name rather than the file name in the plot title inter After the plot is drawn, you get a chance to redraw the plot with a different x- and y-range, and also on a different device. In this way you can make a hard-copy without re-running the program. In this case, points outside of the user specified x,y-range ARE included in the plot buffer, so that if you redefine the ranges, those points are available for plotting.
log Write the values and errors (if averaging) that are plotted into the log file. No attempt to separate baselines is made, except that automatically obtained by not setting OPTIONS=NOBASE
_uvplt.for,v 1.1 2011/06/01 04:31:59 pteuben Exp $