; UVHIM ;--------------------------------------------------------------- ;! Images statistics of uv data files. ;# TASK UV ANALYSIS ;----------------------------------------------------------------------- ;; Copyright (C) 1995, 1999, 2006, 2009 ;; 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 ;----------------------------------------------------------------------- UVHIM LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC UVHIM: Task to produce histograms summarizing uv data. INNAME uv name INCLASS uv class INSEQ 0.0 9999.0 uv sequence number INDISK 0.0 9.0 uv disk number SOURCES Sources to plot, ' '=>all. QUAL -10.0 Qualifier -1=>all CALCODE Calibrator code ' '=>all STOKES Stokes type to select. SELBAND Bandwidth to select (kHz) SELFREQ Frequency to select (MHz) FREQID Freq. ID to select. TIMERANG Time range to select ANTENNAS Antennas to plot BASELINE Baselines with ANTENNAS UVRANGE UV range in kilolambda. SUBARRAY 0.0 1000.0 Subarray, 0 => all BCHAN 0.0 4096.0 1st spectral channel # ECHAN 0.0 4096.0 Last spectral channel # CHINC 0.0 4096.0 Increment in channel # BIF Low IF number to plot EIF Highest IF number to plot 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. 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. IMSIZE output image size OUTNAME Output file name OUTCLASS Output file class OUTSEQ 0.0 Output file sequence number OUTDISK 0.0 Output file disk BPARM (1,2) axis types (3) fixed scale? (4,5) X min,max (6,7) Y min max (8) Conv func support radius (9) Conv func type DOBLANK -1.0 1.0 > 0 => blank all 0 pixels ---------------------------------------------------------------- UVHIM Type: Task Use: UVHIM produces an image of a two-dimensional histogram which summarizes the content of a uv data set. Adverbs: INNAME......uv name, Standard defaults. INCLASS.....uv class, Standard defaults. INSEQ.......uv sequence number, 0 -> highest. INDISK......uv disk number, 0 -> any. SOURCES....List of sources to be plotted. ' '=> all; if any starts with a '-' then all except ANY source named. QUAL.......Qualifier of source to be plotted. -1 => all. CALCODE....Calibrator code of sources to plot. ' '=> all. STOKES.....The desired Stokes type of the plotted data: 'I','Q','U','V','RR','LL','HALF','FULL' default usually FULL which will plot RR, LL, RL, and LR all added into the same plot. Use 'HALF' or 'RRLL' or 'I' to examine only parallel-hand data. 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. For data which contain multiple bandwidths or frequencies the task will insist that some form of selection be made by frequency or bandwidth. 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. 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 all SELBAND, SELFREQ and FREQID are not specified (<= 0) then the task will loop over the frequency ID plotting all of them! TIMERANG...Time range of the data to be plotted. In order: Start day, hour, min. sec, end day, hour, min. sec. Days relative to reference date. ANTENNAS...A list of the antennas to plot. If any number is negative then all antennas listed are NOT desired and all others are. All 0 => list all. BASELINE...Baselines are specified using BASELINE. Eg. for baselines 1-6,1-8, 2-6 and 2-8 use ANTENNAS=1,2; BASELINE=6,8. UVRANGE....Range of projected spacings to be plotted in 1000's of wavelengths. 0 => 1, 1.E10 SUBARRAY...Subarray number to plot. 0 => all - the task will loop over subarray number. BCHAN......Beginning spectral line channel number. 0 => 1. ECHAN......Ending spectral line channel number. 0 => max. CHINC......Increment in spectral line channel number. 0 => 1. BIF........First IF number to plot. 0 => 1 EIF........Last IF number to plot. 0 => highest 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 multi-source data or an SN table for single-source. 0 => highest. DOPOL......If > 0 then correct data for instrumental polarization as represented in the AN table. Only one subarray may be done at a time. 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. BLVER......Version number of the baseline based calibration (BL) table to apply. <0 => apply no BL table, 0 => highest, if any. FLAGVER....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......(multi-source) specifies the version of the BP table to be applied. 0 => highest numbered table. 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). OUTNAME.....The output image name; standard defaults. OUTCLASS....The output image class; standard defaults. OUTSEQ......The output image seq. #. 0 => highest unique. OUTDISK.....The output disk drive no. 0 => highest with space. IMSIZE......Output image size in pixels: 0 => 256. BPARM.......Control paramaters (1) Code for parameter along X axis (2) Code for parameter on Y axis: choices are 1: visibility real part 2: visibility imaginary part 3: visibility amplitude part 4: visibility phase part 5: visibility weight part 6: time 7: baseline length [sqrt (u*u+v*v)] 8: baseline position angle 9: u 10: v 11: w (3) > 0 => Fixed scale or range on X and Y axes (4,5) X axis min, max: if BPARM(4)BPARM(5) then use self scale but not outside the range BPARM(5) to BPARM(4) and if BPARM(4)=BPARM(5) then self scale (6,7) Y axis min, max: if BPARM(6)BPARM(7) then use self scale but not outside the range BPARM(7) to BPARM(6) and if BPARM(6)=BPARM(7) then self scale. (8) Support radius in pixels over which a sample is counted. 0 -> 0.5 (9) Function used when counting sample: 0 => -1 1 : Circular pillbox 2 : Circular linear (Hanning like) 3 : Circular exponential 4 : Circular Gaussian -1 : Rectangular pillbox -2 : Rectangular linear (Hanning like) -3 : Rectangular exponential -4 : Rectangular Gaussian DOBLANK.....> 0 => convert all pixels that have count 0 to blanks. ----------------------------------------------------------------