; UBAVG ;--------------------------------------------------------------- ;! Baseline dependent time averaging of uv data ;# TASK UV IMAGING ;----------------------------------------------------------------------- ;; Copyright (C) 1995, 2007 ;; 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 ;----------------------------------------------------------------------- UBAVG LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC UBAVG: Baseline dependent time averaging of "BT" order uv data INNAME Input UV data (name) INCLASS Input UV data (class) INSEQ Input UV data (seq. #) INDISK Input UV data disk # OUTNAME Output uvdata name (name) OUTCLASS Output uv data class OUTDISK Output uvdata disk # OUTSEQ -1.0 32000.0 Output seq. no. APARM (1) max. time (sec) (2) = fov (min) BADDISK Disk #'s to avoid ---------------------------------------------------------------- UBAVG Type: Task Use: Baseline dependent time averaging of uv data. The averaging time is set by the field of view desired and a specified maximum averaging time. NB: data must be sorted to 'BT' order before running. Adverbs: INNAME.....Input UV data file (name). Standard defaults. INCLASS....Input UV data file (class). Standard defaults. INSEQ......Input UV data file (seq. #). 0 => highest. INDISK.....Input UV data file disk #. 0 => any. OUTNAME....Output UV data name (name). Standard defaults. OUTCLASS...Output UV data file (class). OUTDISK....The disk # of output data. 0 => highest with space. OUTSEQ.....Output sequence number. 0 => new file. APARM.....Task enrichment parameters. (1) This gives the maximum averaging time in seconds, 0=> infinite. This parameter may be necessary if subsequent editing or self calibration is required. (2) This is the desired field of view (radius) which is not to be distorted due to time averaging in minutes of arc. 0 = > 20. The field of view is the region in which averaging is not to reduce the amplitude by more than 1% on any baseline. No data separated by more than 268.5 wavelengths divided by APARM(2) are averaged together. sinc(.0781) = 0.99 and .0781 * 60 *180 / pi = 268.5. BADDISK...Disk #'s to avoid for scratch files ----------------------------------------------------------------