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 STOKES 'RR', 'LL', 'VV', 'HH' else HALF TIMERANG Time range to include 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. DOALL > 0 get max/min over time <=0 max/min compares RR and LL only. DOSCAN > 0 do stats on each scan then do averages <= 0 do stats over all times/sources OUTFILE Printed output file DOPLOT -1.0 > 0 Make plots = 2 omit mean 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 (as PIXRANGE) (3,4) range of values in plot of rms/mean (5) > 0 -> label x with channels not frequency (6)-(9) > 0 => omit corresponding plot (10) > 0 -> flag to omit mean or max and/or min FACTOR Scale points by abs(FACTOR) < 0 -> points DOTV > 0 -> plot on TV, else make a plot file GRCHAN > 0 -> use one graphics chan NPLOTS 0.0 9.0 Number plots/page 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

VLBRF Task: This task reads calibrated autocorrelation data to determine spectral characteristics. In each scan (or over all time) and polarization it computes the median and MAD rms as a function of spectral channel. It then sums across scans (if needed) and polarizations to determine the mean, then mean rms, and the mean rms/mean and the max and min of each of these parameters. Finally it can print a text file with all these data and plot the 4 plots for each antenna if selected. This task is based on VBRFI but does the statistical portion as a median and MAD (scaled to an rms) over all times on a per channel basis. If GRCHAN = 0, the first plot for each antenna is a plot of the mean autocorrelation in green, mean rms/mean in blue, and mean rms in pink. The next three plots are the mean autocorrelation, the mean rms, and the mean rms/mean. Pink is the maximum, green the mean, and blue the minimum over scans andpolarizations. Adverbs: 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. STOKES.....Allowed values: 'RR', 'LL', 'VV', 'HH'. Else it does 'HALF' which combines polarizations which may be needed to do statistics. TIMERANG...Time range of the data to be included. In order: Start day, hour, min. sec, end day, hour, min. sec. Days relative to reference date. 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 VLBRF. 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 SMOOTH(2). DOALL......> 0 => the max and min of the autocorrelation spectrum are computed using individual times and polarizations <= 0 => the max and min of the autocorrelation are done over the time average (median) and so compares RR and LL only. DOSCAN.....> 0 => compute the median and MAD/median on a per scan basis and then average them together <= 0 => compute the median and MAD/median over all data lumped together (all times and sources) 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. If DOPLOT >= 2.0, the mean plot line is not plotted. Note that if the mean is exactly the average of the max and min, the line is also not plotted. 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 points. If APARM(4) > APARM(3), use this range when plotting the standard deviation. APARM(4) = 0 is like PIXR(2) = 0 to compress the plot range by omitting at most 5 percent of the points. If APARM(5) > 0, the X axis is labeled with spectral channels rather than frequency. If APARM(6) > 0, omit the first plot (all 3) If APARM(7) > 0, omit the second plot (mean) If APARM(8) > 0, omit the third plot (rms) If APARM(9) > 0, omit the fourth plot (rms/mean) APARM(10) is a mask to exclude the mean (1), min (2), and/or max (4) curves. Thus APARM(10)=6 excludes both max and min curves. 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). GRCHAN.....> 0 -> use a specific graphics channel 0 -> use different colors for max (pink), mean (green), and min (cyan) where the colors listed are the defaults for graphics channels 3, 2, and 4, resp. NPLOTS.....Number of plots per page: 1 - 9. 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 tables mostly).