; UVFND ;--------------------------------------------------------------- ;! prints selected data from UV data set to search for problems ;# Task UV EDITING HARDCOPY ;----------------------------------------------------------------------- ;; Copyright (C) 1995-1996, 1999-2000, 2003-2004, 2006-2007, 2009-2011 ;; 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 ;----------------------------------------------------------------------- UVFND LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC UVFND: Task to print selected source data from a UV disk file 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 BCHAN 0.0 Start channel to test ECHAN 0.0 Last channel to test CHANNEL 0.0 9999.0 Frequency channel to print BIF 0.0 32767.0 IF number to test. NITER 0.0 32767.0 Max # lines printed. 0 => 10 pages UVRANGE 0.0 UV range in kilolambda STOKES Stokes parameters: ' ' => 'I' 'CORR' for correlators SOURCES Source list QUAL -10.0 Calibrator qualifier -1=>all CALCODE Calibrator code ' '=>all TIMERANG Time range SELBAND Bandwidth to select (kHz) SELFREQ Frequency to select (MHz) FREQID Freq. ID to select. None selected => 1. ANTENNAS Antennas to list BASELINE Baselines with ANTENNAS SUBARRAY 0.0 1000.0 Sub-array, 0=>all 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. OPCODE 'CLIP' print excess fluxes 'FRNG' print all in annulus 'UVBX' print points in uv box 'VCLP' print excess (RR-LL)/2 'WTUV' check weights & excess fluxes APARM CLIP:(1) peak ok flux IPOL (2) peak ok pol. flux (3) min. ok flux IPOL (4) min. ok pol flux (5) peak ok phase IPOL (6) peak ok pol. phase (7) min. ok phase IPOL (8) min. ok pol phase FRNG:(1) fringe spacing arsec (2) range fringe spacing (3) baseline pos. angle (4) range of pos. angle UVBX:(1) U in kilolambda (2) range of U (3) V in kilolambda (4) range of V (5) >0 => Hermitian too VCLP:(1) peak ok VPOL flux WTUV 0.0 Maximum "reasonable" weight used only with 'WTUV' 0 => infinity DOCRT -3.0 132.0 > 0 -> use CRT, else printer > 72 => CRT width in chars OUTPRINT Printer disk file to save ---------------------------------------------------------------- UVFND Type: Task Use: List visibility points from a catalogued UV data file meeting criteria set by OPCODE and APARM. One may print on the line printer (or the user's terminal) those points having flux greater than specified cutoffs (separate parallel- hand and cross polarization limits). One may print those samples having an apparent circular polarization greater than some specified cutoff. Or one may print all samples lying within a specified portion of the UV plane. On all OPCODEs, the data are checked for having reasonable times, antenna numbers, and (optionally) weights. Any which don't are printed. UVFND will also work on single disk data giving an appropriate listing of the data. OPCODE='UVBX' allows a window in RA and dec (in degrees) to be specified. 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. BCHAN......Initial channel examined: 0 -> 1 ECHAN......Last channel examined: < BCHAN -> max CHANNEL....First frequency channel to print: 0 -> (BCHAN+ECHAN+1)/2 BIF........IF number to test. 0 => 1. NITER......Do not list more than NITER points. 0 => no more than 10 pages. UVRANGE....Limit print to baselines >= UVRANGE(1) and <= UVRANGE(2) in kilo wavelengths. 0 => all. Ignored for 'UVBX'. SOURCES....List of sources to be listed. ' '=> all; if any starts with a '-' then all except ANY source named. QUAL.......Qualifier of source to be examined. -1 => all. CALCODE....Calibrator code of sources to be examined. ' '=> all. 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.....Limit data tested and printed to the specified STOKES type(s). Can be 'I','IQU','IV','IQUV','RR','LL','RL'. blank => 'I'. A special value ('CORR') is allowed to imply all correlators with no modification. 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. ANTENNAS...A list of the antennas to examine. If any number is negative then all antenna numbers in ANTENNAS are NOT desired and all others are. All 0 => examine all. Note that antenna numbers that do not appear in the relevant antenna file(s) or which appear with a name containing the string 'OUT' are not displayed. BASELINE...Baselines are specified using BASELINE. Eg. baselines 1-6,1-8, 2-6 and 2-8 use ANTENNAS=1,2; BASELINE=6,8. SUBARRAY...Sub-array number to use. 0=>all; if DOCAL > 0 then multiple subarrays (SUBARRAY = 0) are not allowed. 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. 0 => highest. 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....Specifies the version of the flagging table to be applied. 0 => highest numbered table. <0 => no flagging to be applied. DOBAND.....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......Specifies the version of the BP table to be applied. <0 => no bandpass correction done. 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). OPCODE.....If 'CLIP' program applies excess flux test If 'FRNG' program lists points in area of UV plane If 'UVBX' program lists points in area of UV plane If 'VCLP' program applies excess V pol. test If 'WTUV' program applies reasonable weight test and excess flux test. If anything else, just do integrity tests. APARM......For CLIP abd WTUV, APARM(1) is max normal flux (Jy) for total intensity and APARM(2) for polarization. APARM(3) is the min normal flux (Jy) for total intensity and APARM(4) for polarization. For interferometers, <= 0 => no test; there are NO defaults for single-dish data. Phase may also be tested: APARM(5) is the max normal phase (degrees) for total intensity (0 -> 180), APARM(6) is the max for polarization. APARM(7) is the minimum normal phase for total intensity (0 -> -180) and APARM(8) for polarization. For FRNG, APARM(1) is the separation of the fringes in your map in arc seconds. APARM(2) is the range of this separation to be included in listing. APARM(3) is the baseline position angle in deg. and APARM(4) is the range of pos. angle. For UVBX, APARM(1) and APARM(3) give the central values of U and V (in kilolambda) of a rectangular area in the UV plane. APARM(2) and APARM(4) give the half-widths of the area for U and V (in kilo-lambda). APARM(5) is a logical which says, if >0, to display also data at the Hermitian box. For single dish data and OPCODE='UVBX' the specified region is in RA and Dec (degrees) if unprojected data or in projected coordinates for projected data. For VCLP, APARM(1) is the max allowed circular polarization flux ( (RR - LL) / 2 in Jy). WTUV.......Maximum "reasonable" weight --- data with weights greater will be printed. 0 => don't check. This is done if OPCODE is WTUV, otherwise it is ignored. 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. ----------------------------------------------------------------