;CLIPM ;----------------------------------------------------------------------- ;! edits data based on amplitudes out of range ;# TASK UV CALIBRATION EDITING ;----------------------------------------------------------------------- ;; Copyright (C) 1999-2001, 2003 ;; 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 ;----------------------------------------------------------------------- CLIPM LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC CLIPM Flags data based on amplitudes out of range INNAME Input UV file name (name) INCLASS Input UV file name (class) INSEQ 0.0 9999.0 Input UV file name (seq. #) INDISK 0.0 9.0 Input UV file disk unit # SOURCES Source list QUAL -10.0 Source qualifier -1=>all CALCODE Calibrator code ' '=>all TIMERANG Time range to purge SELBAND Bandwidth to select (kHz) SELFREQ Frequency to select (MHz) FREQID Freq. ID to select. BCHAN 0.0 4096.0 Begin channel number. ECHAN 0.0 4096.0 End channel number. BIF 0.0 100.0 Lowest IF number 0=>all EIF 0.0 100.0 Highest IF number 0=>all SUBARRAY 0.0 1000.0 Subarray, 0=>all DOCALIB -1.0 2.0 If >0 calibrate data = 2 calibrate weights GAINUSE CL (or SN) table to apply DOPOL -1.0 10.0 If >0 correct polarization. BLVER BL table to apply. FLAGVER Flag table version: in DOBAND -1.0 10.0 If >0 apply bandpass cal. Method used depends on value of DOBAND (see HELP file). BPVER Bandpass table version ANTENNAS Antennas to consider 0=>all BASELINE Baselines with ANTENNAS UVRANGE Range spacings in klambda APARM Flux range by polarization: (1) = max. allowed parallel (2) = max. allowed cross-pol. (3) = min. allowed parallel (4) = min. allowed cross-pol. (5) > 0 => convert to Stokes before testing amplitudes (6) > 0 => do not flag cross because parallel flagged (8) > 0 => flag all channels if >= APARM(8) are clipped BADDISK 0.0 9999.0 Disks to avoid for scratch ---------------------------------------------------------------- CLIPM Task: This task applies the calibration (optionally) to UV data and then examines the amplitudes for data out of range. It writes entries in the flag table. This is then intended for use with multi-source data during the calibration phases. Be aware that a very large number of flag table lines may be written. Setting APARM(8)=1 is recommended to reduce this a bit. Task UVCOP may be used to apply the flags and is the only task that can handle more than 5000 flags applying to a single time. Task CLIP is easier to use for single-source files and applies the clipping directly rather than with a flag table. Adverbs: INNAME.....Input UV file name (name). Standard defaults. INCLASS....Input UV file name (class). Standard defaults. INSEQ......Input UV file name (seq. #). 0 => highest. INDISK.....Disk drive # of input UV file. 0 => any. SOURCES....Source list. The task loops over all sources specified. '*' = all; a "-" before a source name means all except ANY source named. QUAL.......Only sources with a source qualifier number in the SU table matching QUAL will be used if QUAL is not -1. CALCODE....Sources 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 tests, i.e. SOURCES and QUAL, in the selection of sources to process. TIMERANG...Time range of the data to be copied. In order: Start day, hour, min. sec, day, hour, min. sec. Days relative to reference date. 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/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 override that of FREQID. However, setting SELBAND and SELFREQ may result in an ambiguity. In that case, the task will request that you use FREQID. BCHAN......Begin (line) channel number. 0 => 1. ECHAN......End (line) channel number. 0 => highest. All channels are processed by only BCHAN-ECHAN are examined for setting flags. BIF........First IF to copy. 0=>all. EIF........Highest IF to copy. 0=>all higher than BIF SUBARRAY...Subarray number to copy. 0=>all. 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. If > 1.5, also calibrate the weights (new for VLA, normal for VLBI). GAINUSE....version number of the CL table to apply to multi-source files or the SN table for single-source files. 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 appply. <0 => apply no BL table, 0 => highest. FLAGVER....specifies the version of the flagging table to be applied to the data on input. This version is copied to the highest version + 1 and and new flags are appended to that version. 0 -> highest, -1 -> none. 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 => highest numbered table. <0 => no bandpass correction to be applied. ANTENNAS...A list of the antennas to be examined. All 0 => all. If any number is negative then all antennas listed are NOT to be copied and all others are. BASELINE...If any elements of BASELINE are non zero then all baselines between antennas named in ANTENNAS and those named in BASELINE are specified. If ANTENNAS contains a negative value then all baselines NOT specified are selected. UVRANGE....Range of baselines in kilolambda. APARM......Sets an allowable range in amplitudes (Jy) APARM(1) = max. parallel-hand amplitude. (IPOL, RR, or LL) 0 => 1.e6 APARM(2) = max. cross-amplitude. 0 -> 1e6. (QPOL, UPOL, VPOL, RL, or LR) APARM(3) = min. parallel-hand amplitude. 0 -> -1.e6 APARM(4) = min. cross-hand amplitude. Note that sign is significant for autocorrelation data such as single-dish data. APARM(5) > 0 => convert to Stokes before testing the amplitudes. APARM(6) > 0 => do not flag cross-polarization correlators when the corresponding parallel-hand ones are flagged. APARM(8) > 0 => Flag all spectral channels of an IF/Stokes if >= APARM(8) of them are clipped. BADDISK....A list of disks on which scratch files are not to be placed. ----------------------------------------------------------------