; CALIBRATION ;--------------------------------------------------------------- ;! Information about CALIBRATION ;# INFORMATION GENERAL ;----------------------------------------------------------------------- ;; Copyright (C) 1995-2008 ;; 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 ANCAL Places antenna-based Tsys and gain corrections in CL table 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 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 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 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 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 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 DOPOL selects application of any polarization calibration DTSIM Generate fake UV data EDITA Interactive TV task to edit uv data based on TY/SN/CL tables EDITR Interactive baseline-oriented visibility editor using the TV ELINT Determines and removes gain dependence on elevation 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 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 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 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 OMFIT Fits sources and, optionally, a self-cal model to uv data 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. PEELR calibrates interfering sources in multi-facet imges PHASPRM Phase data array, by antenna number. POLSN Make a SN table from cross polarized fringe fit REAMP modifies UV data re-scaling the amplitudes REFANT Reference antenna REFREQ Allows changing of reference pixel RESEQ Renumber antennas RFI Look for RFI in uv data RLDIF determines Right minus Left phase 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 table editor using the TV SNFLG Writes flagging info based on phases in SN files SNPLT Plots selected contents of SN, TY, PC or CL files 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 SPCAL Determines instrumental polzn. for spec. line UV data SPECINDX Spectral index 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 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 TVFLG interactive flagging of UV data using the TV TYAPL undoes and re-does nominal sensitivity application TYSMO smooths and filters a calibration TY 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 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