AIPS HELP file for SNIFS in 31DEC21
As of Tue Oct 26 22:26:49 2021
SNIFS: Task to plot contents of SN, TY, PC or CL file versus IF
INNAME UV data (name).
INCLASS UV data (class).
INSEQ 0.0 9999.0 UV data (seq. #). 0 => high
INDISK 0.0 9.0 Disk unit #. 0 => any
INEXT Input 'SN','TY','PC', 'CL'
INVERS Input table file version no.
SOURCES Source list
QUAL -10.0 Source qualifier -1=>all
TIMERANG Time range to plot
STOKES Stokes type to plot: R, L,
RR, LL, RRLL, DIFF, RATO
SELBAND Bandwidth to plot (kHz)
SELFREQ Frequency to plot (MHz)
FREQID Freq. ID to plot, -1=>all
SUBARRAY -1.0 Limit to subarray; 0 -> 1
-1 -> all
BIF 0.0 100.0 First IF to plot, 0=>1.
EIF 0.0 100.0 Last IF to plot 0 -> highest
ANTENNAS Antennas to plot 0=>all
PIXRANGE Range to plot: 0 => self
scale each antenna separately
NPLOTS 0.0 28.0 Number of plots per page
OPTYPE Data to be plotted:
'PSUM','PGN ','PON ','POFF',
'PSYS' else 'AMP '
'SAMP' => scalar average AMP
OPCODE Type of plot:
'ALAN' =>all antennas in each
SOLINT plotted together
'ALTI' =>each time within
SOLINT plotted together
one antenna at a time
' ' => average over SOLINT
plot antennas separately
DO3COLOR -1.0 1.0 > 0 use 3-color symbols for
ALAN, ALTI OPCODEs
BCOUNT If INEXT ='PC' and OPTYPE =
'AMP' or 'PHAS, BCOUNT
specifies the phase cal tone
number to be plotted. 0->1.
SOLINT Time interval in seconds
0 = 1.0 (IMPORTANT)
SYMBOL 0.0 24.0 Plot symbol number: 1 - 24
FACTOR -10.0 10.0 Scale plot symbols by FACTOR
<0 => connect points too
DOBLANK -1.0 24.0 > 0, show blanked values with
symbol type DOBLANK
CUTOFF Table weights <= CUTOFF will
not be plotted, flagged data
are not plotted.
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
DOTV -1.0 1.0 > 0 Do plot on the TV, else
make a plot file
GRCHAN 0.0 8.0 Graphics channel
Use: Plots selected calibration data versus IF from a specified SN,
CL, TY, SY, or PC table.
This task can make a gross number of plots, so test your plan
on the TV before making plot files (if you ever make them).
The task is designed to let you examine your table as a
function of IF. Each panel represents a time interval of
SOLINT seconds, with the data averaged over that interval
or with each sample plotted (OPCODE='ALTI'). A panel may
contain one antenna of all antennas (OPCODE='ALAN') occuring in
INNAME.....UV file name (name). Standard defaults.
INCLASS....UV file name (class). Standard defaults.
INSEQ......UV file name (seq. #). 0 => highest.
INDISK.....Disk unit #. 0 => any.
INEXT......'SN','TY, 'PC', 'SY', or 'CL' table to be plotted
INVERS.....Version number of table to plot, 0=>highest no.
SOURCES....Source list. '*' = all; a "-" before a source name means
all except ANY source named.
QUAL.......Only sources with a source qualifier number in the SU table
matching QUAL will be used if QUAL is not -1.
TIMERANG...Time range of the data to be plotted. In order: Start day,
hour, min. sec, end day, hour, min. sec. Days relative to
reference date. If a start and stop time are given and
the XAXIS is 1 (time), then all plots will be from the
given start time to the given stop time. Otherwise, the
X-axis is plotted over the range of X values found in the
data. All plots in a given execution will be on the same
X scale in any case.
STOKES.....The desired Stokes type of the displayed data:
'R' = RCP, 'L' = LCP, 'RL' or 'RRLL' both RCp and LCP
'DIFF' = vector difference between RCP and LCP. Thus, if
OPTYPE='AMP', the result will not be zero even when
both polarizations have the same amplitude if the
'RATO' = ratio between RCP and LCP - done for amplitudes,
system and antenna temperatures, and SNRs only.
SELBAND....Bandwidth of data to be selected. If more than one IF is
present SELBAND is the width of the first IF required.
Units = kHz.
SELFREQ....Frequency of data to be selected. If more than one IF is
present SELFREQ is the frequency of the first IF required.
Units = MHz.
FREQID.....Frequency identifier to select (you may determine which is
applicable from the OPTYPE='SCAN' listing produced by
LISTR). If either SELBAND or SELFREQ are set, their values
overide that of FREQID. However, setting SELBAND and
SELFREQ may result in an ambiguity. In that case, the task
will request that you use FREQID. -1 => all, 0 => first
SUBARRAY...Limit display to specific subarray. -1 -> all, 0 -> 1.
BIF........First IF IF to plot
EIF........Last IF to plot.
If OPCODE = 'IFDF'/'IFRA' will plot difference/ratio of
specified quantity between BIF and EIF.
ANTENNAS...A list of the antennas to be plotted. All 0 => all. If any
number is negative then all antennas listed are NOT to be
plotted and all others are.
PIXRANGE...If PIXR(1) < PIXR(2), all plots will be from PIXR(1) to
PIXR(2). Otherwise each plot will be self-scaling.
NPLOTS.....Number of antennas to plot per page (try 5).
OPTYPE.....Data to be plotted:
'AMP ' = amplitude,
'PHAS' = phase,
'REAL' = real part
'IMAG' = imag part
'DELA' = singleband delay (SN & CL)
'RATE' = rate (SN, CL & PC)
'SNR' = signal/noise (SN & CL)
'GEO' = geometric delay (CL)
'DOPL' = doppler offset (CL)
'TSYS' = sys. temp. (TY) (for VLA is nominal sensitivity)
'TANT' = ant. temp. (TY) (for VLA either back- or
front-end system temperature)
'PDIF' = EVLA Gb * (Pon - Poff) (SY)
'PSUM' = EVLA Gb * (Pon + Poff) (SY)
'PGN ' = EVLA post sync-detector gain = Gb (SY)
'PON ' = EVLA Pon (noise tube on) (SY)
'POFF' = EVLA Poff (noise tube off) (SY)
'PSYS' = EVLA PSUM/PDIF/2 * Tcal (=Tsys) (SY)
uses values from the CD table
' ' => 'PHAS'
OPCODE.....Type of plot:
'ALAN' => will plot the time average of the table values
over each SOLINT with all antennas appearing in
'ALTI' => will plot each time point in SOLINT in a single
plot with one plot per antenna (for all antennas,
followed by the next SOLINT)
other => will plot the time average of the table values
over each SOLINT with each antenna appearing in a
DO3COLOR...> 0 => use 3-color to separate antennas or times in the
ALAN and ALTI modes. Colors from red through
green to blue are used for antenna or time numbers
1 through N. Note that the bluer points are
written after the red ones, so the bluer ones may
overlap and obscure the red ones.
<= 0 => use line type 4 (cyan on TV WHEN grchan IS 0) for
all valid points plotted. Line type 3 (pink on
TV) is used for any blanked ponts plotted.
BCOUNT.....If INEXT ='PC', and OPTYPE = 'AMP' or 'PHAS' then BCOUNT
specifies the phase cal tone number to be plotted. 0 -> 1.
SOLINT.....Critical value determining how the task functions. It is
the time interval in seconds for each plot or set of
plots. Except for OPCODE='ALTI', the table values are
averaged over the SOLINT time interval before plotting.
For ALTI, the individual data samples in SOLINT are
plotted individually in the plot.
SYMBOL.....1: Plus sign (default) 12: Five pointed star
2: Cross (X) 13: Star of David
3: Circle 14: Seven-pointed star
4: Box 15: Eight-pointed star
5: Triangle 16: Nine-pointed star
6: Diamond 17: Ten-pointed star
7: Pentagon 18: 11-pointed star
8: Hexagon 19: 12-pointed star
9: Septagon 20: 13-pointed star
10: Octagon 21: 14-pointed star
11: Nine-gon 22: Plus with gap
23: vertical line
24: Cross with gap
FACTOR.....Scale plot symbols by FACTOR 0 -> 1.
If FACTOR < 0, draw lines between the points and use
abs(FACTOR) to scale the points plotted.
DOBLANK....> 0 => plot blanked solutions with a symbol of type
DOBLANK (see symbol types above). They will be plotted
along the lower edge of each plot. NOTE: if DOTV true
and GRCHAN 0 and DO3COL <= 0, then the blanked samples
will be in the color of graphics channel 3 (pink) and the
good samples in the color of graphics channel 4 (blue).
DOBLANK > 0 is forced to be different than SYMBOL by
CUTOFF.....If >= 0, the task will examine the weight column of the
table and if the weight <= CUTOFF, the task will not plot
that sample. If = 0, will plot all good points; flagged
data are not plotted. CUTOFF is ignored for TY and PC
tables and OPTYPEs MDEL, ATM, GEO, and CCAL.
DOSCAN.....> 0 => plot scan boundaries when there is an NX table and
the X axis is time. The boundary is a tick mark when
DOSCAN=2 and a full line when DOSCAN=1.
<= 0 -> do not plot boundaries.
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.
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.....Graphics channel (1 - 7) to use for line drawing.
A value of 0 causes more than one graphics channel to be