AIPS HELP file for VBRFI in 31DEC21
As of Wed Oct 20 15:58:59 2021
VBRFI: Plots spectral statistics of a subset of a uv data set
INNAME Input UV file name (name)
INCLASS Input UV file name (class)
INSEQ 0.0 9999.0 Input UV file name (seq. #)
INDISK 0.0 9.0 Input UV file disk unit #
SOURCES Source name
QUAL -10.0 Calibrator qualifier -1=>all
CALCODE Calibrator code ' '=>all
ANTENNAS Antennas to include 0=>all
BIF Low IF number included
EIF Highest IF number included
BCHAN 0.0 First channel included
ECHAN 0.0 last channel included
FLAGVER Flag table version
SMOOTH Smoothing function. See
HELP SMOOTH for details.
OUTFILE Printed output file
DOPLOT -1.0 > 0 Make plots
PIXRANGE Range of values in plot of
mean. =-1 for full range
= 0 for most of full range
APARM (1,2) range of values in
plot of standard deviation
(3) > 0 -> label x with
channels not frequency
FACTOR Scale points by abs(FACTOR)
< 0 -> points
DOTV > 0 -> plot on TV, else make
a plot file
LTYPE -410.0 410.0 Type of labeling: 1 border,
2 no ticks, 3 - 6 standard,
7 - 10 only tick labels
<0 -> no date/time
BADDISK Disks to avoid for scratch
Task: This task reeads calibrated autocorrelation data to determine
INNAME.....Input UV file name (name). Standard defaults.
INCLASS....Input UV file name (class). Standard defaults.
INSEQ......Input UV file name (seq. #). 0 => highest.
INDISK.....Disk drive # of input UV file. 0 => any.
SOURCES....Source to be included. ' '=> all; if any starts with a
'-' then all except ANY source named.
QUAL.......Qualifier of source to be included. -1 => all.
CALCODE....Calibrator code of sources to include. ' '=> all.
ANTENNAS...A list of the antennas to be included. All 0 => all.
If any number is negative then all antennas listed are NOT
included and all others are.
BIF........First IF to include. 0 -> 1.
EIF........Last IF to include. 0 -> max.
BCHAN......First channel to include. 0=>all.
ECHAN......Highest channel to include. 0=>all higher than BCHAN
FLAGVER....specifies the version of the flagging table to be applied.
0 => highest numbered table.
<0 => no flagging to be applied.
SMOOTH.....Specifies the type of spectral smoothing to be applied to
a uv database . The default is not to apply any smoothing.
SMOOTH=0 IS RECOMMENDED IN VBRFI. VBPLT will allow later
smoothing if desired from plots.
The elements of SMOOTH are as follows:
SMOOTH(1) = type of smoothing to apply: 0 => no smoothing
To smooth before applying bandpass calibration
1 => Hanning, 2 => Gaussian, 3 => Boxcar, 4 => Sinc
To smooth after applying bandpass calibration
5 => Hanning, 6 => Gaussian, 7 => Boxcar, 8 => Sinc
SMOOTH(2) = the "diameter" of the function, i.e. width
between first nulls of Hanning triangle and sinc
function, FWHM of Gaussian, width of Boxcar. Defaults
(if < 0.1) are 4, 2, 2 and 3 channels for SMOOTH(1) =
1 - 4 and 5 - 8, resp.
SMOOTH(3) = the diameter over which the convolving
function has value - in channels. Defaults: 1,3,1,4
times SMOOTH(2) used when input SMOOTH(3) < net
OUTFILE....Text file for detailed RFI report
DOPLOT.....> 0 -> make plots of the RFI spectra, following adverbs
apply. NOTE: if OUTFILE=' ' and DOPLOT<=0, nothing comes
out of this task.
PIXRANGE...Range of values in plot of mean. <0 -> min to max
Actually PIXR(2) <= PIXR(1) causes the plot to do the
full range of values if PIXR(2) < 0. PIXR(2) = 0 causes
the plot to scale to omit up to 5 percent of the samples. This
often makes the plot show the remaining points much
better. The number of points in each IF that is omitted is
plotted (twice) in each IF panel and printed.
APARM......If APARM(2) > APARM(1), use this range when plotting the
standard deviation. APARM(2) = 0 is like PIXR(2) = 0
to compress the plot range by omitting at most 5 percent of the
If APARM(3) > 0, the X axis is labeled with spectral
channels rather than frequency.
If you must plot the min, mean, and max spectra in the
same color, set APARM(10) to the desired GRCHAN.
FACTOR.....>= 0 -> Plot data with connected lines
< 0 -> Scale plotted points by abs(FACTOR). 0 -> 1.0
DOTV.......> 0 => plot directly on the TV device, otherwise make a
plot file for later display on one or more devices
(including the TV if desired).
LTYPE......Labelling type, see HELP LTYPE for details:
1 = border, 2 = no ticks, 3 or 7 = standard, 4 or 8 =
relative to ref. pixel, 5 or 9 = relative to subimage
(BLC, TRC) center, 6 or 10 = pixels. 7-10 all labels
other than tick numbers and axis type are omitted.
Less than 0 is the same except that the plot file
version number and create time are omitted.
Add n * 100 to alter the metric scaling.
BADDISK....The disk numbers to avoid for scratch files (sorting