AIPS HELP file for QUAL in 31DEC22
As of Wed Mar 29 16:53:55 2023
HELP SECTION
QUAL
Type: Adverb (Real)
Use: To specify the source qualifier to select the desired data.
This attribute is no longer used in most cases.
Null value: -1
Null value assignment means select all values of QUAL.
Verbs:
OBITIMAG......Access to OBIT task Imager without self-cal or peeling.
OBITPEEL......Access to OBIT task Imager with self-cal and peeling.
OBITSCAL......Access to OBIT task Imager with self-cal, NOT peeling.
Procedures:
LINIMAGE......Build image cube from multi-IF data set.
VLACALIB......Runs CALIB and LISTR for VLA observation.
VLACLCAL......Runs CLCAL and prints the results with LISTR.
Tasks:
ACFIT.........Determine antenna gains from autocorrelations.
ACIMG.........Makes image of autocorrelation data showing time vs
frequency
ACLIP.........Edits suto-corr data for amplitudes, phases, and weights
out of range.
ACSCL.........Corrects cross amplitudes using auto correlation
measurements.
ALVAR.........Plots the Allan Variance statistic of a UV data set.
ALVPR.........Prints statistics on the Allan Variance of a UV data set.
ANBPL.........Plots and prints uv data converted to antenna based
values.
AVSPC.........Averages uv-data in the frequency domain.
BLING.........Find residual rate and delay on individual baselines.
BPASS.........Computes spectral bandpass correction table.
BPWAY.........Determines channel-dependent relative weights.
BPWGT.........Calibrates data and scales weights by bandpass
correction.
BSCAN.........Seeks best scan to use for phase cal, fringe search, ..
CALIB.........Determines antenna calibration: complex gain.
CAPLT.........Plots closure amplitude and model from CC file.
CLCAL.........Merges and smooths SN tables, applies them to CL tables.
CLIP..........Edits data based on amplitudes, phases, and weights out
of range.
CLOSE.........Plots closure phase or amplitude spectra averaged over
closures.
CLPLT.........Plots closure phase and model from CC file.
CORER.........Calculates correlator statistics and flags bad ones.
CPASS.........Computes polynomial spectral bandpass correction table.
CVEL..........Shifts spectral-line UV data to a given velocity.
DECOR.........Measures the decorrelation between channels and IF of uv
data.
DEFLG.........Edits data based on decorrelation over channels and time.
DFTIM.........Makes image of DFT at arbitrary point showing time vs
frequency.
DFTPL.........Plots DFT of a UV data set at arbitrary point versus
time.
DIFRL.........Divides the RR data by LL data.
DTSUM.........Task to provide a summary of the contents of a dataset.
EDITR.........Interactive baseline-oriented visibility editor using the
TV.
ELFIT.........Plots/fits selected contents of SN, TY, SY, PC or CL
files.
ELINT.........Determines and removes gain dependence on elevation.
EVASN.........Evaluates statistics in SN/CL tables.
EVAUV.........Subtracts & divides a model into UV data, does statistics
on results.
FGCNT.........Counts samples comparing two flag tables.
FGSPW.........Flags bad spectral windows.
FILLM.........Reads VLA on-line/archive format uv data tapes (post Jan
88).
FILLR.........Reads old VLA on-line-system tapes into AIPS.
FINDR.........Find normal values for a uv data set.
FITLD.........Reads FITS files to load images or UV (IDI or UVFITS)
data to disk.
FLAGR.........Edit data based on internal RMS, amplitudes, weights.
FLGIT.........Flags data based on the rms of the spectrum.
FLOPM.........Reverses the spectral order of UV data, can fix VLA
error.
FRING.........Fringe fit data to determine antenna calibration, delay,
rate.
FRMAP.........Task to build a map using fringe rate spectra.
FRPLT.........Task to plot fringe rate spectra.
FUDGE.........Modifies UV data with user's algorithm: paraform task.
GETJY.........Determines calibrator flux densities.
IMAGR.........Wide-field and/or wide-frequency Cleaning / imaging task.
KRING.........Fringe fit data to determine antenna calibration, delay,
rate.
MAPBM.........Map VLA beam polarization.
NOIFS.........Makes all IFs into single spectrum.
PCAL..........Determines instrumental polarization for UV data.
PCVEL.........Shifts spectral-line UV data to a given velocity: planet
version.
PHSRF.........Perform phase-referencing within a spectral line
database.
POSSM.........Task to plot total and cross-power spectra.
PROFL.........Generates plot file for a profile display.
PRTSY.........Task to print statistics from the SY table.
REWAY.........Computes weights based in rms in spectra.
RFI...........Look for RFI in uv data.
RFLAG.........Flags data set based on time and freq rms in fringe
visibilities.
RIRMS.........Computes rms of real/imag of a selected subset of a uv
data set
RLCAL.........Determines instrumental right-left phase versus time (a
self-cal).
RLDLY.........Fringe fit data to determine antenna R-L delay
difference.
SETJY.........Task to enter source info into source (SU) table.
SNBLP.........Plots selected contents of SN or CL files on a baseline
basis.
SNFIT.........Fits parabola to SN amplitudes and plots result.
SNFLG.........Writes flagging info based on the contents of SN files.
SNIFS.........Plots selected contents of SN, TY, SY, PC or CL files by
IF.
SNPLT.........Plots selected contents of SN, SY, TY, PC or CL files
versus time.
SOUSP.........Fits source spectral index from SU table or adverbs.
SPLAT.........Applies calibration and splits or assemble selected
sources.
SPLIT.........Converts multi-source to single-source UV files w
calibration.
SPMOD.........Modify UV database by adding a model with spectral lines.
SPRMS.........Plots spectral statistics of a selected subset of a uv
data set.
SUFIX.........Modifies source numbers on uv data.
SWAPR.........Modifies UV data by swapping real and imaginary parts.
SYPRT.........Task to print values from the SY table.
SYVSN.........Plots selected SY/TY data with SN solution values versus
time.
TI2HA.........Modifies times in UV data to hour angles.
TIORD.........Checks data for time baseline ordering, displays
failures.
TRUEP.........Determines true antenna polarization from special data
sets.
UFLAG.........Plots and edits data using a uv-plane grid and the TV.
UV2MS.........Append single-source file to multi-source file.
UV2TB.........Converts UV autocorrelation spectra to tables.
UVAVG.........Average or merge a sorted (BT, TB) uv database.
UVBAS.........Averages several channels and subtracts from uv data.
UVCOP.........Task to copy a subset of a UV data file.
UVFLG.........Flags UV-data.
UVFND.........Prints selected data from UV data set to search for
problems.
UVFRE.........Makes one data set have the spectral structure of
another.
UVHGM.........Plots statistics of uv data files as histogram.
UVHIM.........Makes image of the histogram on two user-chosen axes.
UVHOL.........Prints holography data from a UV data base with
calibration.
UVLIN.........Fits and removes continuum visibility spectrum, also can
flag.
UVLOD.........Read export or FITS data from a tape or disk.
UVLSD.........Least squares fit to channels and divides the uv data.
UVLSF.........Least squares fit to channels and subtracts from uv data.
UVMLN.........Edits data based on the rms of the spectrum.
UVMOD.........Modify UV database by adding a model incl spectral index.
UVMTH......... Averages one data set and applied it to another.
UVPLT.........Plots data from a UV data base in multiple ways.
UVPRM.........Measures parameters from a UV data base.
UVPRT.........Prints data from a UV data base with calibration.
UVRFI.........Mitigate RFI by Fourier transform or fitting the circle.
UVRMS.........Computes statistics of a selected subset of a uv data
set.
VBRFI.........Plots spectral statistics of VLBA autocorrelation data
for RFI.
VLBRF.........Plots spectral statistics of VLBA autocorrelation data
for RFI.
VPLOT.........Plots uv data and model from CC file.
WIPER.........Plots and edits data from a UV data base using the TV.
XYMOD.........Compute linear polarization point source model, applies
to data.
EXPLAIN SECTION