; BASFIT ;--------------------------------------------------------------- ;! fits antenna locations from SN-table data ;# Procedure UV Calibration ;----------------------------------------------------------------------- ;; Copyright (C) 2002 ;; 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 ;----------------------------------------------------------------------- BASFIT LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC BASFIT: Procedure to calibrate and fit antenna locations INNAME UV data (name). INCLASS UV data (class). INSEQ 0.0 9999.0 UV data (seq. #). 0 => high INDISK Disk unit #. 0 => any ANTENNAS Antennas to fit SUBARRAY 0.0 1000.0 Subarray, 0=>1 REFANT 0.0 90.0 Reference antenna OUTPRINT Output text file base name DOCOLOR Do color plots (if > 0) ---------------------------------------------------------------- BASFIT Type: Procedure Use: Runs 3 tasks: 1. CALIB on scan averages of all calibrator sources 2. LOCIT to fit the phases of the SN table for antenna locations; prints and plots the results. 3. LWPLA to put the plots on paper 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. ANTENNAS...A list of the antennas to fit. If any number is negative then all antennas listed are NOT desired and all others are. All 0 => fit all except REFANT. SUBARRAY...Subarray number to list. 0=>1. REFANT.....Antenna that is asumed to be fixed --- all fits are relative to this antenna. Note that you may use no reference antenna if you wish - effectively saying that the reference antenna phases are all zero which they will be if the same REFANT was used in CALIB. The difference method has no use for a REFANT. OUTPRINT...The output text file name without extension. The extensions .FIT, .SUM, .OPR, and .VLA are written. The first contains everything, the others just summaries. OUTPRINT = ' ' => do not write the text files. DOCOLOR....The procedure has two plot modes. If DOCOLOR <= 0, one antenna is plotted per page with all IFs and polarizations in separate plots. If DOCOLOR > 0, three antennas are plotted on a page, all IFs and polarizations are plotted together for each antenna but in different symbols and colors. Comments: 1. CALIB is run with ANTENNAS=0, CALCODE='*', APARM=3,0; SOLINT=0 to solve for all antennas, using scan averages of all calibrator sources, allowing fits with 3 or more antennas. 2. LOCIT is run in a) IF phase is assumed constant and is fit. b) No K term is found c) Elevations < 30 degrees are ignored d) Hour angles < -6 and > +6 hours are ignored. e) One or three antennas are plotted per page depending on DOCOLOR. f) The plots have a minimum scale of -20 to 20 degrees, but will go to larger values if needed. See LOCIT help for more information. Plot colors (DOCOLOR true) meaning IF 1 Pol R = yellow RGB = (1 1 0) 1 L = green (0.06 1 0) 2 R = pink (1 0.67 1) 2 L = cyan (0 1 1) Background nearly black (0.07, 0.08, 0.03) ----------------------------------------------------------------