Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.mrao.cam.ac.uk/~dag/UVFXT/ReadMe.txt Дата изменения: Wed Apr 11 18:41:58 2007 Дата индексирования: Tue Oct 2 01:30:59 2012 Кодировка: Поисковые слова: http www.astronomy.com

UVFXT (to fix timestamps on GMRT uv data files within AIPS)
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To correct GMRT visibilites with timestamps near the beginning of the
integration period, instead of middle. For example, for 16.9 s integrations,
move timestamps on all uv data points forward by 7.4 s, (i.e. to centre of
16.9 s from the centre of the initial 2.1 s integration), and rotate u,v,w
coordinates forward.

Files:

UVFXT.FOR <- source code (adapted from AIPS template, FUDGE.FOR)
UVFXT.HLP <- help text

To compile (as per Section 12.5.2 of the AIPS Cookbook):

source /opt/aips/LOGIN.CSH <- to setup AIPS etc (or whatever, in
your setup)
$CDTST <- to setup logicals

LIBS $APLPGM > UVFXT.OPT <- to create linking options file

COMLNK UVFXT UVFXT.OPT <- to compile and link

To use:

setenv MYAIPS `pwd` <- in directory where compiled

and then within AIPS say

VERSION 'MYAIPS'

to make UVFXT available. APARM(1) is the time (in s) to move the data forward
by, and APARM(2) is the number of points to print out old/new U,V,W values, for
diagnostics.

This has been used successfully on single source UV files (but has not been
tried for multi-source UV files).

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If you make use of this task, please cite:

Garn et al. 2007, MNRAS, 376, 1251.

where this task is briefly described.

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Dave Green (dag@mrao.cam.ac.uk) -- MRAO -- 2007 April 11th