Content-type: text/html Manpage of transfix

transfix

Section: User Commands (1)
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NAME

transfix - Correct for leakage near transit of DEC ~ -30 sources.  

PERSON RESPONSIBLE

rjs  

CATEGORIES

uv analysis  

DESCRIPTION

This corrects for polarisation leakage caused by errors in the ATCA antenna orientation. The importance of this effect goes inversely with the square of the difference of the source declination from -30. It is most extreme at transit.

To run this task, you must have the pointing parameter file used at the ATCA during your observation.

To first order, it is not too important whether this correction is applied before or after gpcal is used, particularly for sources very close to DEC=-30. Some experimentation might be helpful.  

PARAMETERS

vis
The name of the input uv data set. No default.
select
The normal uv selection commands. The default is to select everything.
line
The normal uv linetype in the form:
  line,nchan,start,width,step
The default is all channels. Note that if there are multiple spectral windows, the fitting process is performed on each window separately.
pparams
Pointing parameter table. These tables are stored on LEON at Narrabri in the file at$log:pparams.log. It is usually entered as an indirect parameter file. The table consists of 6 lines (one per antenna), each consisting of 12 numbers (the first number being the antenna number).
options
Task enrichment options. Possible values are
  replace  Replace the XY and YX correlations with an estimate
           of the error. This option is only meaningful for
           a polarisation-calibrated unpolarised dataset.
Additionally there are the standard options to turn off calibration:
  nocal    Do not apply antenna calibration.
  nopol    Do not apply leakage correction.
  nopass   Do no apply bandpass calibration.

out
The name of the output uv data-set. There is no default name.


 

Index

NAME
PERSON RESPONSIBLE
CATEGORIES
DESCRIPTION
PARAMETERS

This document was created by man2html, using the manual pages.
Time: 18:35:38 GMT, July 05, 2011