; CALIBRATION ;--------------------------------------------------------------- ;! Information about CALIBRATION ;# INFORMATION GENERAL ;----------------------------------------------------------------------- ;; Copyright (C) 1995-2016 ;; Associated Universities, Inc. Washington DC, USA. ;; ;; This program is free software; you can redistribute it and/or ;; modify it under the terms of the GNU General Public License as ;; published by the Free Software Foundation; either version 2 of ;; the License, or (at your option) any later version. ;; ;; This program is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; ;; You should have received a copy of the GNU General Public ;; License along with this program; if not, write to the Free ;; Software Foundation, Inc., 675 Massachusetts Ave, Cambridge, ;; MA 02139, USA. ;; ;; Correspondence concerning AIPS should be addressed as follows: ;; Internet email: aipsmail@nrao.edu. ;; Postal address: AIPS Project Office ;; National Radio Astronomy Observatory ;; 520 Edgemont Road ;; Charlottesville, VA 22903-2475 USA ;----------------------------------------------------------------------- CALIBRATIOLLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC ---------------------------------------------------------------- For a lengthy description of the calibration of interferometric data (VLA and VLB line and continuum) enter: HELP CALIBRAT **************************************************************** List of verbs, adverbs, tasks in category CALIBRATION 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 ACSCL Corrects cross amplitudes using auto correlation measurements 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 BDAPL Applies a BD table to another data set 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. BPEDT Interactive TV task to edit uv data based on BP tables 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 BPWAY Determines channel-dependent relative weights BPWGT Calibrates data and scales weights by bandpass correction 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 CENTR modifies UV data to center the reference channel 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 CLVLB Corrects CL table gains for pointing offsets in VLBI data 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 DOVLAMP Produces amp calibration file for phased-VLA VLBI data 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 FGTAB 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 FTFLG interactive flagging of UV data in channel-time using the TV 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 - run-time help HLPEDIBP Interactive BP table uv-data editor BPEDT - run-time help HLPEDICL Interactive SN/CL table uv-data editor - run-time help HLPEDIPC Interactive PC table editor PCEDT - run-time help HLPEDISN Interactive SN/CL table (not UV) editor - run-time help HLPEDISS Interactive SY table (not UV) editor - run-time help HLPEDISY Interactive SY table uv-data editor EDITA - run-time help HLPEDITS Interactive TY table (not UV) editor - run-time help HLPEDITY Interactive TY table uv-data editor EDITA - run-time help HLPEDIUV Interactive uv-data editor EDITR - run-time help HLPFTFLG Interactive time-channel visibility Editor - run-time help HLPIBLED Interactive Baseline based visibility Editor - run-time help HLPPCFLG Interactive time-channel PC table Editor PCFLG - run-time help HLPSCIMG Full-featured image plus self-cal loops, editing - run-time help HLPSCMAP Imaging plus self-cal and editing SCMAP - run-time help HLPSPFLG Interactive time-channel visibility Editor SPFLG - run-time help HLPTVFLG Interactive time-baseline visibility Editor TVFLG - run-time 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. IMSCAL large image self-cal with IM2CC and OOCAL 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 frequency 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 MINANTEN states minimum number of antennas for a solution 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 ONEFREQ states that the current CC model was made with one frequency 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 PCEDT Interactive TV task to edit PC tables PCFIT Finds delays and phases using a PC table PCFLG interactive flagging of Pulse-cal data in channel-TB using the TV PCLOD Reads ascii file containing pulse-cal info to PC table. PCPLT Plots pulse-cal tables in 2 dimensions as function of time PCVEL shifts spectral-line UV data to a given velocity: planet version 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. PIPEAIPS calibrating amplitude and phase, and imaging VLA data 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 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 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 SNP2D Task to convert SN table single-channel phase to delay 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 TASAV Task to copy all extension tables to a dummy uv or map file TAU0 Opacities by antenna number TDEPEND Time-dependent imaging procedure sequence 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 TYCOP copy TY or SY table calibration between IFs 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 UVGIT Fits source models to 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 VLAMP Makes ANTAB file for phased VLA used in VLBI observations 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 VLBAAMP applies a-priori amplitude corrections to VLBA data VLBABPSS computes spectral bandpass correction table VLBACALA applies a-priori amplitude corrections to VLBA data VLBACCOR 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 VLBARUN 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