AIPS HELP file for BIF in 31DEC25
As of Wed Dec 11 6:45:18 2024
HELP SECTION
BIF
Type: Adverb (scalar)
Use: Standard data selection adverb, used to specify the first IF (or
spectral window) to be included. An IF consists of a set of one
or more equally spaced frequency channels; multiple IFs with
arbitrary frequency spacings are allowed.
Null value:
0 => first IF in data.
Verbs:
OBITIMAG......Access to OBIT task Imager without self-cal or peeling.
OBITMAP.......Simplified access to OBIT task Imager.
OBITPEEL......Access to OBIT task Imager with self-cal and peeling.
OBITSCAL......Access to OBIT task Imager with self-cal, NOT peeling.
SIZEFILE......Return file size plus estimate of IMAGR work file size.
Procedures:
CXIMAGR.......Grid UV data into a complex image, Fourier transform,
Clean.
CXPOLN........Procedure to make complex polarization images and beam.
DOVLAMP.......Produces amp calibration file for phased-VLA VLBI data.
IMFRING.......Large image delay fitting with IM2CC and OOFRING.
LINIMAGE......Build image cube from multi-IF data set.
MAPPR.........Simplified access to IMAGR.
OOFRING.......Fringe fit data to determine calibration with spectral
index options.
Tasks:
ACIMG.........Makes image of autocorrelation data showing time vs
frequency
ACLIP.........Edits suto-corr data for amplitudes, phases, and weights
out of range.
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.
ANCAL.........Places antenna-based Tsys and gain corrections in CL
table.
APCAL.........Apply TY and GC tables to generate an SN table.
ATMCA.........Determines delay/phase gradient from calibrator
observations.
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.
BLING.........Find residual rate and delay on individual baselines.
BLPLT.........Plots BLCAL tables in 2 dimensions as function of
baseline and IF.
BPCOR.........Correct BP table.
BPEDT.........Interactive TV task to edit uv data based on BP tables.
BPEPL.........Plots bandpass tables overlaying multiple times like
BPEDT.
BPFLG.........Flgas uv data based on bad BP values.
BPLOT.........Plots bandpass tables in 2 dimensions as function of
time.
BPPLT.........Plots selected contents of bandpass (BP) files versus
time.
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, ..
CAPLT.........Plots closure amplitude and model from CC file.
CLCOR.........Applies user-selected corrections to the calibration CL
table.
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.
CLSMO.........Smooths a calibration CL table.
CLVLB.........Corrects CL table gains for pointing offsets in VLBI
data.
COHER.........Baseline Phase coherence measurement.
CORER.........Calculates correlator statistics and flags bad ones.
CPASS.........Computes polynomial spectral bandpass correction table.
CSCOR.........Applies specified corrections to CS tables.
DECOR.........Measures the decorrelation between channels and IF of uv
data.
DEFLG.........Edits data based on decorrelation over channels and time.
DELZN.........Determines residual atmosphere depth at zenith and clock
errors.
DFCOR.........Applies user-selected corrections to the calibration CL
table.
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.
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.
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.
FGPLT.........Plots selected contents of FG table.
FGPRT.........Pprints counts of selected portions of an FG table.
FGSPW.........Flags bad spectral windows.
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.
FTFLG.........Interactive flagging of UV data in channel-time using the
TV.
FUDGE.........Modifies UV data with user's algorithm: paraform task.
GETJY.........Determines calibrator flux densities.
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.
LOCIT.........Fits antenna locations from SN-table data.
LPCAL.........Determines instrumental polarization for UV data.
MAPBM.........Map VLA beam polarization.
MBDLY.........Fits multiband delays from IF phases, updates SN table.
MORIF.........Combines IFs or breaks spectral windows into multiple
windows (IFs).
NOIFS.........Makes all IFs into single spectrum.
OMFIT.........Fits sources and, optionally, a self-cal model to uv
data.
OOSUB.........Subtracts/divides a model from/into a uv data base.
OTFBS.........Translates on-the-fly continuum SDD format to AIPS UV
file.
OTFIN.........Lists on-the-fly single-dish SDD format data files.
OTFUV.........Translates on-the-fly single-dish SDD format to AIPS UV
file.
PCAL..........Determines instrumental polarization for UV data.
PCCOR.........Corrects phases using PCAL tones data from PC table.
PCEDT.........Interactive TV task to edit pulse-cal (PC) tables.
PCFLG.........Interactive flagging of Pulse-cal data in channel-TB
using the TV.
PCPLT.........Plots pulse-cal tables in 2 dimensions as function of
time.
PDPLT.........Plots selected contents of PD tables.
PLOTC.........Plots color schems used by 3-color plot tasks.
PLRFI.........Plots spectral statistics from output of VBRFI & VLBRF
POSSM.........Task to plot total and cross-power spectra.
PRTSD.........Prints contents of AIPS single-dish data sets.
PRTUV.........Prints contents of a visibility (UV) data set.
QUACK.........Flags beginning or end portions of UV-data scans.
REAMP.........Scale visibility amplitudes by IF- or subarray-dependent
factor.
REWGT.........Modifies UV data re-scaling the weights only.
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).
RLCOR.........Corrects a data set for R-L phase differences.
RLDIF.........Determines Right minus Left phase difference, corrects
cal files.
RLDLY.........Fringe fit data to determine antenna R-L delay
difference.
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.
SDMOD.........Modifies single-dish UV data with model sources.
SETJY.........Task to enter source info into source (SU) table.
SHOUV.........Displays uv data in various ways.
SNBLP.........Plots selected contents of SN or CL files on a baseline
basis.
SNCOR.........Applies user-selected corrections to the calibration SN
table.
SNEDT.........Interactive SN/CL/TY/SY table editor using the TV.
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.
SNP2D.........Task to convert SN table single-channel phase to delay.
SNPLT.........Plots selected contents of SN, SY, TY, PC or CL files
versus time.
SNRMS.........Print statistics for selected contents of SN, SY, TY,
PC or CL files.
SNSMO.........Smooths and filters a calibration SN table.
SOLCL.........Adjust gains for solar data according to nominal
sensitivity.
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.
SYPRT.........Task to print values from the SY table.
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.
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.
UVADC.........Fourier transforms and corrects a model and adds to uv
data.
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.
UVCRS.........Finds the crossing points of UV-ellipses.
UVDIF.........Prints differences between two UV data sets.
UVFIT.........Fits source models to uv data.
UVFLG.........Flags UV-data.
UVFND.........Prints selected data from UV data set to search for
problems.
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.
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.
UVSUB.........Subtracts/divides a model from/into a uv data base.
VBRFI.........Plots spectral statistics of VLBA autocorrelation data
for RFI.
VH2RL.........Converts from linear to circular polarization and vice
versa.
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.
XYDIF.........Find/apply X minus Y linear polarization phase
difference.
XYMOD.........Compute linear polarization point source model, applies
to data.
EXPLAIN SECTION