; SHOUV ;--------------------------------------------------------------- ;! displays uv data in various ways. ;# Task UV Calibration ;----------------------------------------------------------------------- ;; Copyright (C) 1995-1997, 1999-2000, 2004, 2006, 2009-2010 ;; 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 ;----------------------------------------------------------------------- SHOUV LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC SHOUV: Displays uv data in various ways. INNAME UV data (name). INCLASS UV data (class). INSEQ 0.0 9999.0 UV data (seq. #). 0 => high INDISK 0.0 9.0 Disk unit #. 0 => any OPTYPE List type: 'CLOS', 'SPEC', 'AVIF' SOURCES Source list CALCODE Calibrator code ' '=>all TIMERANG Time range to list STOKES Stokes type to list. SELBAND Bandwidth to select (kHz) SELFREQ Frequency to select (MHz) FREQID Freq. ID to select. None selected => 1. BIF 0.0 100.0 Lowest IF number 0=1 EIF 0.0 100.0 Highest IF number BCHAN 0.0 2048.0 Low channel number 0=>1 ECHAN 0.0 2048.0 High channel number ANTENNAS Antennas to list UVRANGE 0.0 UV range in kilolambda SUBARRAY 0.0 1000.0 Subarray, 0=>1 Cal. info for input: DOCALIB -1.0 101.0 > 0 calibrate data & weights > 99 do NOT calibrate weights GAINUSE CAL (CL or SN) table to apply DOPOL -1.0 10.0 If >0 correct polarization. PDVER PD table to apply (DOPOL>0) BLVER BL table to apply. FLAGVER Flag table version DOBAND -1.0 10.0 If >0 apply bandpass cal. Method used depends on value of DOBAND (see HELP file). BPVER Bandpass table version SMOOTH Smoothing function. See HELP SMOOTH for details. DPARM Control info: (1) 0=amp, 1=phase, 2=RMS (2) 0=vec avg, 1=scalar (3) No. digits per column 5-7: amplitude; 5-9: phase (def=5) (4) avg. time min DOCRT -3.0 132.0 > 0 -> use the terminal, else use the line printer > 72 => terminal width OUTPRINT Printer disk file to save BADDISK 0.0 10.0 Disk to avoid for scratch. ---------------------------------------------------------------- SHOUV Type: Task Use: Prints information in a uv data base in a variety of possible forms. Numerous selection criteria are available and calibration and flagging may optionally be applied. SHOUV will work on multisource, indexed files or TB sorted single source files in some modes. Not all adverbs apply to all types of listing; the following notes when an adverb is used for only some listing types or its useage depends on the type. Adverbs: INNAME.....UV file name (name). Standard defaults. INCLASS....UV file name (class). Standard defaults. INSEQ......UV file name (seq. #). 0 => highest. INDISK.....Disk unit #. 0 => any. OPTYPE.....Type of listing desired: 'CLOS'=print closure phases for triples composed of the antennas in ANTENNAS as triplets, e.g. ANTE= 1,2,3,5,6,7 will display triplets 1-2-3 and 5-6-7 'SPEC'=displays selected channels and IFs. 'AVIF'=like SPEC but all channels in each IF are averaged first. SOURCES....List of sources to be listed. ' '=> all; if any starts with a '-' then all except ANY source named. CALCODE....Calibrators may be selected on the basis of the calibrator code given in the SU table. ' ' => any calibrator code selected '* ' => any non blank code (cal. only) '-CAL' => blank codes only (no calibrators) anything else = calibrator code to select. NB: The CALCODE test is applied in addition to the other selection tests TIMERANG...Time range of the data to be listed. In order: Start day, hour, min. sec, end day, hour, min. sec. Days relative to ref. date. STOKES.....The desired Stokes type of the listed data: 'I','Q','U','V','RR','LL','RL','LR' ' '=>'I' SELBAND....Bandwidth of data to be selected. If more than one IF is present SELBAND is the width of the first IF required. Units = kHz, 0=> all SELFREQ....Frequency of data to be selected. If more than one IF is present SELFREQ is the frequency of the first IF required. Units = MHz, 0=> all FREQID.....Frequency identifier to select (you may determine which is applicable from the OPTYPE='SCAN' listing produced by LISTR. If either SELBAND or SELFREQ are set, their values overide that of FREQID. However, setting SELBAND and SELFREQ may result in an ambiguity. In that case the task will request that you use FREQID. If neither SELBAND, SELFREQ nor FREQID are specified then the first FQ id in the FQ table (usually 1) will be used. BIF........Lowest IF to list. 0=>1 EIF........Highest IF to list. 0 =>highest BCHAN......First channel to list. 0=>1 ECHAN......Last channel to list. 0=>highest ANTENNAS...A list of the antennas to list. The detailed use of ANTENNAS depends on OPTYPE. UVRANGE....Range of projected spacings to be listed in 1000's of wavelengths. 0 => 1, 1.E10 SUBARRAY...Subarray number to list. 0=>1. DOCALIB....If true (>0), calibrate the data using information in the specified Cal (CL) table for multi-source or SN table for single-source data. Also calibrate the weights unless DOCALIB > 99 (use this for old non-physical weights). GAINUSE....Version number of the Cal. table to apply to the data if DOCALIB=1. Refers to a CL table for multisource data of an SN table for single source. DOPOL......If > 0 then correct data for instrumental polarization as represented in the AN or PD table. This correction is only useful if PCAL has been run or feed polarization parameters have been otherwise obtained. See HELP DOPOL for available correction modes: 1 is normal, 2 and 3 are for VLBI. 1-3 use a PD table if available; 6, 7, 8 are the same but use the AN (continuum solution) even if a PD table is present. PDVER......PD table to apply if PCAL was run with SPECTRAL true and 0 < DOPOL < 6. <= 0 => highest. BLVER......Version number of the baseline based calibration (BL) table to appply. <0 => apply no BL table, 0 => highest. FLAGVER....(multisource) specifies the version of the flagging table to be applied. 0 => highest numbered table. <0 => no flagging to be applied. DOBAND.....(multi-source) If true (>0) then correct the data for the shape of the antenna bandpasses using the BP table specified by BPVER. The correction has five modes: (a) if DOBAND=1 all entries for an antenna in the table are averaged together before correcting the data. (b) if DOBAND=2 the entry nearest in time (including solution weights) is used to correct the data. (c) if DOBAND=3 the table entries are interpolated in time (using solution weights) and the data are then corrected. (d) if DOBAND=4 the entry nearest in time (ignoring solution weights) is used to correct the data. (e) if DOBAND=5 the table entries are interpolated in time (ignoring solution weights) and the data are then corrected. BPVER......(multisource) specifies the version of the BP table to be applied plotted (if APARM(8)=2) or applied (if DOBAND > 0 and APARM(8) .NE. 2). 0 => highest numbered table. <0 => no bandpass correction to be applied. SMOOTH.....Specifies the type of spectral smoothing to be applied to a uv database . The default is not to apply any smoothing. The elements of SMOOTH are as follows: SMOOTH(1) = type of smoothing to apply: 0 => no smoothing To smooth before applying bandpass calibration 1 => Hanning, 2 => Gaussian, 3 => Boxcar, 4 => Sinc To smooth after applying bandpass calibration 5 => Hanning, 6 => Gaussian, 7 => Boxcar, 8 => Sinc SMOOTH(2) = the "diameter" of the function, i.e. width between first nulls of Hanning triangle and sinc function, FWHM of Gaussian, width of Boxcar. Defaults (if < 0.1) are 4, 2, 2 and 3 channels for SMOOTH(1) = 1 - 4 and 5 - 8, resp. SMOOTH(3) = the diameter over which the convolving function has value - in channels. Defaults: 1,3,1,4 times SMOOTH(2) used when input SMOOTH(3) < net SMOOTH(2). DPARM......Control info: 1) controls the type of information to be printed: 0 => amplitude, 1 => phase, 2 => RMS of amplitude. 2) controls the type of averaging: 0 => vector average, 1 => amp scalar averaging. Amplitudes and phases averaged separately. 3) The number of digits per column for column based listings. The allowed range is 5 to 7 for amplitude and 5 to 9 for phase. The default value is 5 in both cases. Phase quantities will be printed in decimal form for column widths greater than 6. 4) Averaging time in min. DOCRT......False (<= 0) use the line printer if OUTPRINT = ' ' else write named OUTPRINT file only. When OUTPRINT is not blank, DOCRT=-2 suppresses the page-feed character on page headers and DOCRT=-3 suppresses page headers and most other header information. True (> 0) use the terminal interactively. The task will use the actual terminal width as a display limit unless 72 < DOCRT < width. In that case, the display limit will be DOCRT characters. OUTPRINT...Disk file name in which to save the line printer output. ' ' => use scratch and print immediately for interactive jobs - batch jobs use OUTPRINT = 'PRTFIL:BATCHjjj.nnn' (jjj= job #, nnn = user #). When OUTPRINT is not blank, multiple outputs are concatenated, and the file is not actually printed. BADDISK....Disk numbers to avoid for scratch files. Scratch files may be created by the sorting routines if calibration or flagging is applied. ---------------------------------------------------------------- SHOUV: Task to list uv data. DOCUMENTOR: Bill Cotton NRAO/CV RELATED PROGRAMS: LISTR, UVFLG PURPOSE SHOUV is designed to display uv data in line printer listing form as an aid in evaluating and editing data; several methods of displaying the data are provided. SHOUV should work on both single and multi-source data files. The standard adverbs for calibration and editing (e.g. applying CL, BL and FG tables to the data etc.) are provided. COMMENTS OPTYPE: OPTYPE='CLOS' requests a column listing of the "closure phase" for one or more triplets of antennas. For example the closure phase of the triplet 1-2-3 is: Phase_1-2 - Phase_1-3 + Phase_2-3 This value is independent of atmospheric or geometric errors in the interferometer model and is useful for detecting either errors in the correlator (when used on calibrator source data) or for source resolution. Averaging is done before forming the closure phases. The closure phase triplets are defined by the entries in array ANTENNAS takes as triplets; up to 16 triplets may thus be requested. For example: ANTENNAS=1,2,3, 6,7,8, 2,3,5 requests the triplets 1-2-3, 6-7-8 and 2-3-5. OPTYPE='SPEC' requests column listings of the amplitude of phase of the baseline selected by the first two elements of ANTENNAS. Only channels/IF selected by BCHAN,ECHAN,BIF,EIF will be displayed. ANTENNAS=5,10 selects baseline 5-10 OPTYPE='AVIF' is like 'SPEC' except that all channels in each IF are averaged first. DPARM: Control Information. (1) specifies the type of information to be listed: 0 => amplitude of the visibility, 1 => phase of the visibility, 2 => RMS of amplitude. (2) specifies the type of averaging: 0 => vector averaging of the selected visibilities before conversion to amplitude or phase. 1 => "amp-scalar" averaging; amplitudes and phases are computed for the individual visibilities and averaged. (3) specifies the number of digits per column in the output to be used for each value listed. The allowed range is 5 to 7 for amplitude and 5 to 9 for phase; the default in both cases is 5. Phase quantities will be printed in decimal form for column widths greater than 6. (4) specifies the averaging time in minutes.