13.6 CALIBRAT
For a lengthy description of the calibration of interferometric
data (VLA and VLB line and continuum) enter:
HELP CALIBRAT
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ACCOR Corrects cross amplitudes using auto correlation measurements
ACFIT Determine antenna gains from autocorrelations
ACLIP edits suto-corr data for amplitudes, phases, and weights out of range
ANCAL Places antenna-based Tsys and gain corrections in CL table
ANCHECK Checks By sign in Antenna files
ANTAB Read amplitude calibration information into AIPS
ANTENNAS Antennas to include/exclude from the task or verb
ANTUSE Antennas to include/exclude from the task or verb
ANTWT Antenna Weights for UV data correction in Calibration
APCAL Apply TY and GC tables to generate an SN table
APGPS Apply GPS-derived ionospheric corrections
ATMCA Determines delay/phase gradient from calibrator observations
BASELINE specifies which antenna pairs are to be selected/deselected
BASFIT fits antenna locations from SN-table data
BLAPP applies baseline-based fringe solutions a la BLAPP
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
BLVER specifies the version of the baseline-calibration table used
BPASS computes spectral bandpass correction table
BPASSPRM Control adverb array for bandpass calibration
BPCOR Correct BP table.
BPERR Print and plot BPASS closure outputs
BPLOT Plots bandpass tables in 2 dimensions as function of time
BPSMO Smooths or interpolates bandpass tables to regular times
BPVER specifies the version of the bandpass table to be applied
BSPRT print BS tables
BSROT modifies SD beam-switch continuum data for error in throw
CALCODE specifies the type of calibrator to be selected
CALDIR lists calibrator models available as AIPS FITS files
CALIB determines antenna calibration: complex gain
CALIBRAT describes the process of data calibration in AIPS
CALIN specifies name of input disk file usually with calibration data
CALRD Reads model-image FITS file
CALSOUR specifies source names to be included in calibration
CC2IM Make model image from a CC file
CHANSEL Array of start, stop, increment channel numbers to average
CLCAL merges and smooths SN tables, applies them to CL tables
CLCOP copy CL/SN file calibration between polarizations or IFs
CLCOR applies user-selected corrections to the calibration CL table
CLCORPRM Parameter adverb array for task CLCOR
CLINT CL table entry interval
CLINV copy CL/SN file inverting the calibration
CLIP edits data based on amplitudes, phases, and weights out of range
CLSMO smooths a calibration CL table
CMETHOD specifies the method by which the uv model is computed
CMODEL specifies the method by which the uv model is computed
CONFI Optimize array configuration by minimum side lobes
CPASS computes polynomial spectral bandpass correction table
CSCOR applies specified corrections to CS tables
CVEL shifts spectral-line UV data to a given velocity
DCHANSEL Array of start, stop, increment channel #S + IF to avoid
DECOR Measures the decorrelation between channels and IF of uv data
DEFLG edits data based on decorrelation over channels and time
DELCORR specifies whether VLBA delay corrections are to be used
DELZN Determines residual atmosphere depth at zenith and clock errors
DFCOR applies user-selected corrections to the calibration CL table
DIGICOR specifies whether VLBA digital corrections are to be applied
DOACOR specifies whether autocorrelation data are included
DOAPPLY Flag to indicate whether an operation is applied to the data
DOBAND specifies if/how bandpass calibration is applied
DOBTWEEN Controls smoothing between sources in calibration tables
DOCALIB specifies whether a gain table is to be applied or not
DODELAY selects solution for phase/amplitude or delay rate/phase
DOFIT Controls which antennas are fit by what methods
DOFLAG Controls closure cutoff in gain solutions and flagging
DOOSRO calibrating amplitude and phase, and imaging VLA data
DOPOL selects application of any polarization calibration
DTSIM Generate fake UV data
EDITA Interactive TV task to edit uv data based on TY/SY/SN/CL tables
EDITR Interactive baseline-oriented visibility editor using the TV
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
FACES makes images of catalog sources for initial calibration
FARAD add ionospheric Faraday rotation to CL table
FGPLT Plots selected contents of FG table
FINDR Find normal values for a uv data set
FIXWT Modify weights to reflect amplitude scatter of data
FLAGR Edit data based on internal RMS, amplitudes, weights
FLAGVER selects version of the flagging table to be applied
FLGIT flags data based on the rms of the spectrum
FQTOL Frequency tolerance with which FQ entries are accepted.
FRCAL Faraday rotation self calibration task
FREQID Frequency Identifier for frequency, bandwidth combination
FRING fringe fit data to determine antenna calibration, delay, rate
GAINERR gives estimate of gain uncertainty for each antenna
GAINUSE specifies output gain table or gain table applied to data
GAINVER specifies the input gain table
GCPLT Plots gain curves from text files
GCVER specifies the version of the gain curve table used
GETJY determines calibrator flux densities
GPSDL Calculate ionospheric delay and Faraday rotation corrections
HLPCLEAN Cleaning tasks - internal help
HLPEDICL Interactive SN/CL table uv-data editor - internal help
HLPEDISN Interactive SN/CL table (not UV) editor - internal help
HLPEDISS Interactive SY table (not UV) editor - internal help
HLPEDISY Interactive SY table uv-data editor - internal help
HLPEDITS Interactive TY table (not UV) editor - internal help
HLPEDITY Interactive TY table uv-data editor - internal help
HLPEDIUV Interactive uv-data editor - internal help
HLPIBLED Interactive Baseline based visibility Editor - internal help
HLPSCIMG Cleaning tasks - internal help
HLPSCMAP Cleaning tasks - internal help
HLPSPFLG Interactive time-channel visibility Editor - internal help
HLPTVFLG Interactive time-baseline visibility Editor - internal help
HYB RUN to set parameters for HYBRID (CALIB/MX) self-cal imaging
IBLED Interactive BaseLine based visibility EDitor
ICHANSEL Array of start, stop, increment channel #S + IF to average
IM2CC Task to convert an image to multi-facet Clean Components
IMAGR Wide-field and/or wide-frequency Cleaning / imaging task.
INDXH writes index file describing contents of UV data base
INDXR writes index file describing contents of UV data base
INTERPOL specifies the type of averaging done on the complex gains
INTPARM specifies the parameters of the gain interpolation function
KRING fringe fit data to determine antenna calibration, delay, rate
LDGPS load GPS data from an ASCII file
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
MINAMPER specifies the minimum amplitude error prior to some action
MINPHSER specifies the minimum phase error prior to some action
MSORT Sort a UV dataset into a specified order
MULTI Task to convert single-source to multi-source UV data
NORMALIZ specifies the type of gain normaliztion if any
OMFIT Fits sources and, optionally, a self-cal model to uv data
OOCAL determines antenna complex gain with frequency-dependent models
OOSRT Sort a UV dataset into a specified order
OOSUB Subtracts/divides a model from/into a uv data base
PBEAM Fits the analytic function to the measured values of the beam
PCAL Determines instrumental polarization for UV data
PCCOR Corrects phases using PCAL tones data from PC table
PCLOD Reads ascii file containing pulse-cal info to PC table.
PDVER specifies the version of the spetral polarization table to use
PEELR calibrates interfering sources in multi-facet imges
PHASPRM Phase data array, by antenna number.
POLANGLE Intrinsic polarization angles for up to 30 sources
POLSN Make a SN table from cross polarized fringe fit
PRTSY Task to print statistics from the SY table
QUFIX determines Right minus Left phase difference, corrects cal files
QUOUT writes text file of Q, U versus frequency to be used by RLDIF
REAMP modifies UV data re-scaling the amplitudes
REFANT Reference antenna
REFREQ Allows changing of reference pixel
RESEQ Renumber antennas
REWGT modifies UV data re-scaling the weights only
RFI Look for RFI in uv data
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
SDVEL shifts spectral-line single-dish data to a given velocity
SEARCH Ordered list of antennas for fring searches
SELBAND Specified bandwidth
SELFREQ Specified frequency
SETJY Task to enter source info into source (SU) table.
SHOUV displays uv data in various ways.
SMODEL Source model
SMOTYPE Specifies smoothing
SNCOR applies user-selected corrections to the calibration SN table
SNCORPRM Task-specific parameters for SNCOR.
SNDUP copies and duplicates SN table from single pol file to dual pol
SNEDT Interactive SN/CL/TY/SY table editor using the TV
SNFLG Writes flagging info based on the contents of SN files
SNIFS Plots selected contents of SN, TY, SY, PC or CL files
SNPLT Plots selected contents of SN, TY, PC or CL files
SNREF Chooses best reference antenna to minimize R-L differences
SNSMO smooths and filters a calibration SN table
SNVER specifies the output solution table
SOLCL adjust gains for solar data according to nominal sensitivity
SOLCON Gain solution constraint factor
SOLINT Solution interval
SOLMIN Minimum number of solution sub-intervals in a solution
SOLMODE Solution mode
SOLSUB Solution sub-interval
SOLTYPE Solution type
SOUCODE Calibrator code for source, not calibrator, selection
SOUSP fits source spectral index from SU table or adverbs
SPCAL Determines instrumental polzn. for spec. line UV data
SPECINDX Spectral index used to correct calibrations
SPECPARM Spectral index per polarization per source
SPECTRAL Flag to indicate whether an operation is spectral or continuum
SPECURVE Spectral index survature used to correct calibrations
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
SY2TY Task to generate a TY extension file from an EVLA SY table
SYCOP copy SY table calibration between IFs
TASAV Task to copy all extension tables to a dummy uv or map file
TAU0 Opacities by antenna number
TECOR Calculate ionospheric delay and Faraday rotation corrections
TIMSMO Specified smoothing times
TRECVR Receiver temperatures by polarization and antenna
TRIANGLE specifies closure triangles to be selected/deselected
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
TYVER specifies the version of the system temperature table used
UNCAL sets up tables for uncalibrating Australia Telescope data
USUBA Assign subarrays within a uv-data file
UVCRS Finds the crossing points of UV-ellipses.
UVFIT Fits source models to uv data.
UVFLG Flags UV-data
UVHOL prints holography data from a UV data base with calibration
UVMLN edits data based on the rms of the spectrum
UVPRT prints data from a UV data base with calibration
UVSRT Sort a UV dataset into a specified order
UVSUB Subtracts/divides a model from/into a uv data base
VBCAL Scale visibility amplitudes by antenna based constants
VLABP VLA antenna beam polarization correction for snapshot images
VLACALIB Runs CALIB and LISTR for VLA observation
VLACLCAL Runs CLCAL and prints the results with LISTR
VLALIST Runs LISTR for VLA observation
VLAMODE VLA observing mode
VLANT applies VLA/EVLA antenna position corrections from OPs files
VLAOBS Observing program or part of observer’s name
VLAPROCS Procedures to simplify the reduction of VLBA data
VLARESET Reset calibration tables to a virginal state
VLARUN calibrating amplitude and phase, and imaging VLA data
VLBACALA applies a-priori amplitude corrections to VLBA data
VLBACPOL Procedure to calibrate cross-polarization delays
VLBAEOPS Corrects Earth orientation parameters
VLBAFQS Copies different FQIDS to separate files
VLBAFRGP Fringe fit phase referenced data and apply calibration
VLBAFRNG Fringe fit data and apply calibration
VLBAKRGP Fringe fit phase referenced data and apply calibration
VLBAKRNG Fringe fit data and apply calibration
VLBAMCAL Merges redundant calibration data
VLBAMPCL Calculates and applies manual instrumental phase calibration
VLBAPANG Corrects for parallactic angle
VLBAPCOR Calculates and applies instrumental phase calibration
VLBAPIPE applies amplitude and phase calibration procs to VLBA data
VLBATECR Calculate ionospheric delay and Faraday rotation corrections
VLBAUTIL Procedures to simplify the reduction of VLBA data
VLOG Pre-process external VLBA calibration files
WEIGHTIT Controls modification of weights before gain/fringe solutions
WETHR Plots selected contents of WX tables, flags data based on WX
WRTPROCS Procedures to simplify the reduction of VLBA data
WTTHRESH defines the weight threshold for data acceptance
WTUV Specifies the weight to use for UV data outside UVRANGE