AIPS HELP file for PLRFI in 31DEC22
As of Fri Dec 1 12:03:13 2023
PLRFI: Plots spectral statistics from output of VBRFI
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 #
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
SMOOTH Smoothing function. See
HELP SMOOTH for details.
INFILE VBRFI text file
BCOUNT Start number of input text
ECOUNT End number of input text
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
(4) > 0 -> do not separate
IFs, label full X axis
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 reads the output of VBRFI to make plots (which VBRFI
could have made in the first place). Up to 100 such output files
may be concatenated, however.
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.
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
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 although the results will
differ especially for the rms/mean spectra.
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
INFILE.....Text file with detailed RFI report. The task initially
tries to open the file as named. If that fails, then
it appends a BCOUNT to the name and tries again. NOTE: if
ECOUNT > BCOUNT, then this form of naming is required.
BCOUNT.....Multiple files may be read if they are named INFILE with an
integer appended from BCOUNT to ECOUNT. It is a good idea to
have the files be in increasing frequency order, but is not
required (i.e. there is likely to be overlap on occasion).
0 -> 1.
ECOUNT.....Highest file number. < BCOUNT -> BCOUNT.
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