AIPS HELP file for SELBAND in 31DEC25
As of Wed Dec 11 6:13:47 2024
HELP SECTION
SELBAND
Type: Adverb (Real)
Use: A selection adverb for the calibration tasks. It specifies the
bandwidth of the data to be selected. If more than one frequency
ID is present in the data, SELBAND is the bandwidth of the first
frequency ID required. Units are kilohertz.
Null value: 0 -. use SELFREQ or FREQID
Procedures:
LINIMAGE......Build image cube from multi-IF data set.
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.
ANCAL.........Places antenna-based Tsys and gain corrections in CL
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.
BASRM.........Task to remove a spectral baseline from total power
spectra.
BLAPP.........Applies baseline-based fringe solutions a la BLAPP.
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.
BPASS.........Computes spectral bandpass correction table.
BPPLT.........Plots selected contents of bandpass (BP) files versus
time.
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.
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.
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.
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.
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.
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.
LISUN.........Prints contents of UV data sets with Sun angles.
LOCIT.........Fits antenna locations from SN-table data.
LPCAL.........Determines instrumental polarization for UV data.
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.
PRTSY.........Task to print statistics from the SY table.
QUACK.........Flags beginning or end portions of UV-data scans.
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).
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.
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.
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.
SNREF.........Chooses best reference antenna to minimize R-L
differences.
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.
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.
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.
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.
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.
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.
VH2RL.........Converts from linear to circular polarization and vice
versa.
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