; VLBACCOR ;--------------------------------------------------------------- ;! applies a-priori amplitude corrections to VLBA data ;# PROCEDURE VLBI UTILITY CALIBRATION ;----------------------------------------------------------------------- ;; Copyright (C) 2015 ;; 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 ;----------------------------------------------------------------------- VLBACCOR LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC VLBACCOR: Applies digital sampling correction to VLBA data INNAME Input file name INCLASS Input file class INSEQ Input file sequence number INDISK Disk number for input file VLBACCOR is defined in the VLBAUTIL run file. ---------------------------------------------------------------- VLBACCOR Type: Procedure Use: VLBACCOR is a procedure that applies digital sampling corrections to VLBA data. These corrections are added to the corrections in the highest numbered CL table. Type RUN VLBAUTIL to define the VLBACCOR procedure. INNAME.....The name of the file to be corrected. Wildcard characters are allowed. INCLASS....The class of the file to be corrected. Wildcard characters are allowed. INSEQ......The sequence number of the file to be corrected. Zero defaults to the highest sequence number of a file matching INNAME, INCLASS, and INDISK. INDISK.....The disk drive number of the file to be corrected. Zero defaults to any disk. ---------------------------------------------------------------- VLBACCOR: Procedure to apply digital sampling corrections Documentor: Amy Mioduszewski Related Programs: VLBAUTIL, ACCOR, SNSMO, CLCAL VLBACCOR determines amplitude corrections for digital sampling effects, removes bad points, and applies these corrections to the highest numbered calibration (CL) table attached to the input file. You should run VLBACCOR after correcting the polarization labels (if necessary). VLBACCOR should be used along with VLBABPSS and VLBAAMP instead of VLBACALA. This redesign of the amplitude calibration path is based on VLBA Scientific Memo #37 (Craig Walker). VLBACCOR should NEVER be used with VLBACALA. The new recommended steps for amplitude calibration are: 1) Do preliminary calibration steps that are necessary (e.g., VLBAFIX, VLBAEOPS, VLBATECR...). 2) VLBACCOR -- digital sampling corrections 3) VLBAMPCL (or VLBAPCOR) -- remove instrumental delay 4) VLBABPSS -- do bandpass and correct auto-correlations 5) VLBAAMP -- a priori amplitude calibration 6) Continue with calibration.