visir_util_undistort(7) Correct the distortion in spectral data

SYNOPSIS

esorex visir_util_undistort [OPTIONS] FILE.sof

DESCRIPTION

The files listed in the Set Of Frames (sof-file) must be tagged: VISIR-chopnod-corrected-file.fits CHOPNOD_CORRECTED Optionally, a bad pixel map may be provided: VISIR-bpm-file.fits STATIC_MASK

The product(s) will have a FITS card 'HIERARCH ESO PRO CATG' with a value of: UNDISTORTED The recipe default values for the transformation are only valid for spectral data taken in Low resolution mode

OPTIONS

--bkgcorrect <bool>
Cho-nod correct the data (bool; default: True). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.bkgcorrect [default = True].
--xl <long>
Coordinate in spatial direction. Together with yl it defines the lower point of a rectangle containing only skylines for the wavelength shift detection (long; default: 117). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.xl [default = 117].
--yl <long>
Coordinate in wavelength direction. See xl (long; default: 110). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.yl [default = 110].
--xh <long>
Coordinate in spatial direction. Together with yl it defines the higher point of a rectangle containing only skylines for the wavelength shift detection (long; default: 125). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.xh [default = 125].
--yh <long>
Coordinate in wavelength direction. See xh (long; default: 150). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.yh [default = 150].
--slit_skew <float>
Distortion correction: Skew of slit (degrees) (clockwise) (float; default: 0.52). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.phi [default = 0.52].
--spectrum_skew <float>
Distortion correction: LMR Skew of spectrum (degrees) (counter- clockwise). Not used in High Resolution (float; default: 1.73). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.ksi [default = 1.73].
--vert_arc <float>
Distortion correction: LR Detector vertical curvature (pixel). Reduced by a factor 4 in MR. Not used in HR A-side. Increased by a factor 115/52 in HR B-side (float; default: -0.8). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.eps [default = -0.8].
--hori_arc <float>
Distortion correction: LMR Detector horizontal curvature (pixel). Increased by a factor 1.5 in HR A-side. Reduced by a factor 2 in HR B-side (float; default: 0.0). The full name of this option for the EsoRex configuration file is visir.visir_util_undistort.delta [default = 0.0].

Note that it is possible to create a configuration file containing these options, along with suitable default values. Please refer to the details provided by the 'esorex --help' command.

VERSION

visir_util_undistort 4.2.0

AUTHOR

Lars Lundin <[email protected]>

BUG REPORTS

Please report any problems to [email protected] Alternatively, you may send a report to the ESO User Support Department <[email protected]>.

LICENSE

This file is part of the VISIR Instrument Pipeline Copyright (C) 2011 European Southern Observatory

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., 51 Franklin St, Fifth Floor, Boston, MA 02111-1307 USA