AIPS HELP file for FLAGVER in 31DEC24
As of Mon Oct 14 7:52:47 2024
HELP SECTION
FLAGVER
Type: Adverb (Scalar)
Use: Standard data selection adverb; used to specify the version
number of the flagging (FG) table to be applied. If FLAGVER <
0, then NO flag table is applied. This adverb is only relevant
when the data being operated on has an associated flag (FG)
table.
A flag table may be applied to single-source or multi-source
data sets and may be applied to data which are not in time
order. If data are in time order, then flagging will work so
long as no more than 60000 flags apply to any one time. If the
data are not in time order, then flagging works only if no more
than 60000 flags apply to the current data. If you exceed these
limits, you may run UVCOP to apply the FG table so long as you
are within limits 10 times larger.
If this adverb is not in the inputs of a particular verb or
task, then that verb or task does NOT apply flagging.
Null value: 0 => different for different tasks.
Normally means use the highest numbered flag table.
In UVCOP it means do no flagging.
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:
BLPOLCAL......Do BLCHN for I, Q, U, V models
CALMODEL......Applies SPLIT & UVSUB to make a model data set matching
a calibrator.
CRSFRING......Procedure to calibrate cross pol. delay and phase
offsets.
FXALIAS.......Least squares fit aliasing function and remove.
LINIMAGE......Build image cube from multi-IF data set.
STUFFR........Averages together data sets in hour angle.
VLACALIB......Runs CALIB and LISTR for VLA observation.
VLBACPOL......Procedure to calibrate cross-polarization delays.
Tasks:
ACCOR.........Corrects cross amplitudes using auto correlation
measurements.
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.
AVGWT.........Computes the average visibility weight of the included
data.
AVSPC.........Averages uv-data in the frequency domain.
BLAVG.........Average cross-polarized UV data over baselines.
BLCAL.........Compute closure offset corrections.
BLCHN.........Compute closure offset corrections on a
channel-by-channel basis.
BLING.........Find residual rate and delay on individual baselines.
BLPCL.........Do divide by I,Q,U models for circular polarization
BLCHN.
BPASS.........Computes spectral bandpass correction table.
BPEDT.........Interactive TV task to edit uv data based on BP tables.
BPFLG.........Flgas uv data based on bad BP values.
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, ..
BSGRD.........Task to image beam-switched single-dish data.
CALIB.........Determines antenna calibration: complex gain.
CAPLT.........Plots closure amplitude and model from CC file.
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.
EDITA.........Interactive TV task to edit uv data based on TY/SY/SN/CL
tables.
EDITR.........Interactive baseline-oriented visibility editor using the
TV.
EVACL.........Evaluates statistics in closure phase and amplitude.
EVAUV.........Subtracts & divides a model into UV data, does statistics
on results.
FGCNT.........Counts samples comparing two flag tables.
FGDIF.........Compares affect of 2 FG tables.
FGSPW.........Flags bad spectral windows.
FINDR.........Find normal values for a uv data set.
FIXAL.........Least squares fit aliasing function and remove.
FIXWT.........Modify weights to reflect amplitude scatter of data.
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.
FTFLG.........Interactive flagging of UV data in channel-time using the
TV.
FUDGE.........Modifies UV data with user's algorithm: paraform task.
HOLIS.........Prints information about holography sampling.
IBLED.........Interactive BaseLine based visibility EDitor.
IMAGR.........Wide-field and/or wide-frequency Cleaning / imaging task.
KRING.........Fringe fit data to determine antenna calibration, delay,
rate.
LISTR.........Prints contents of UV data sets and assoc. calibration
tables.
LPCAL.........Determines instrumental polarization for UV data.
MAPBM.........Map VLA beam polarization.
NOIFS.........Makes all IFs into single spectrum.
OBEDT.........Task to flag data of orbiting antennas.
OFLAG.........Uses on-line flag table information to write a flag
table.
OMFIT.........Fits sources and, optionally, a self-cal model to uv
data.
PCAL..........Determines instrumental polarization for UV data.
PCVEL.........Shifts spectral-line UV data to a given velocity: planet
version.
PDEDT.........Interactive TV task to edit polarization D-term (PD)
tables.
PHSRF.........Perform phase-referencing within a spectral line
database.
POSSM.........Task to plot total and cross-power spectra.
PRTSD.........Prints contents of AIPS single-dish data sets.
PRTSY.........Task to print statistics from the SY table.
QUACK.........Flags beginning or end portions of UV-data scans.
REFLG.........Attempts to compress a flag 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).
RLDIF.........Determines Right minus Left phase difference, corrects
cal files.
RLDLY.........Fringe fit data to determine antenna R-L delay
difference.
SCIMG.........Full-featured imaging plus self-calibration loop with
editing.
SCMAP.........Imaging plus self-calibration loop with editing.
SDCAL.........Task to apply single dish calibration.
SDGRD.........Task to select and image random-position single-dish
data.
SDIMG.........Task to select and image random-position single-dish
data.
SDVEL.........Shifts spectral-line single-dish data to a given
velocity.
SHOUV.........Displays uv data in various ways.
SNEDT.........Interactive SN/CL/TY/SY table editor using the TV.
SNFLG.........Writes flagging info based on the contents of SN files.
SPCAL.........Determines instrumental polzn. for spec. line UV data.
SPFLG.........Interactive flagging of UV data in channel-TB using the
TV.
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.
SYSOL.........Undoes and re-does nominal sensitivity application for
Solar data.
TACOP.........Task to copy tables, other extension files.
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.
TVFLG.........Interactive flagging of UV data using the TV.
TYAPL.........Undoes and re-does nominal sensitivity application.
TYSMO.........Smooths and filters a calibration TY or SY table.
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.
UVFIT.........Fits source models to 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.
UVGIT.........Fits source models to uv data.
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.
UVIMG.........Grid UV data into an "image".
UVLIN.........Fits and removes continuum visibility spectrum, also can
flag.
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.
VH2RL.........Converts from linear to circular polarization and vice
versa.
VLAMP.........Makes ANTAB file for phased VLA used in VLBI
observations.
VLBRF.........Plots spectral statistics of VLBA autocorrelation data
for RFI.
VPLOT.........Plots uv data and model from CC file.
WETHR.........Plots selected contents of WX tables, flags data based on
WX.
WIPER.........Plots and edits data from a UV data base using the TV.
XYDIF.........Find/apply X minus Y linear polarization phase
difference.
XYMOD.........Compute linear polarization point source model, applies
to data.
EXPLAIN SECTION