NAME

       visir_util_undistort - 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 <int>
              Coordinate in spatial direction. Together with yl it  defines  the  lower  point  of  a  rectangle
              containing  only skylines for the wavelength shift detection (int; default: 117). The full name of
              this option for the EsoRex configuration file is visir.visir_util_undistort.xl [default = 117].

       --yl <int>
              Coordinate in wavelength direction. See xl (int; default: 110). The full name of this  option  for
              the EsoRex configuration file is visir.visir_util_undistort.yl [default = 110].

       --xh <int>
              Coordinate  in  spatial  direction.  Together  with  yl it defines the higher point of a rectangle
              containing only skylines for the wavelength shift detection (int; default: 125). The full name  of
              this option for the EsoRex configuration file is visir.visir_util_undistort.xh [default = 125].

       --yh <int>
              Coordinate  in  wavelength direction. See xh (int; 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.

SEE ALSO

       The full documentation for the visir pipeline can be downloaded as a PDF file using the following URL:

              ftp://ftp.eso.org/pub/dfs/pipelines/visir/visir-pipeline-manual-1.4.pdf

       An    overview    over    the    existing    ESO    pipelines    can   be   found   on   the   web   page
       https://www.eso.org/sci/software/pipelines/.

       Basic documentation about the EsoRex program can be found at the esorex (1) man page.

       It  is  possible  to  call   the   pipelines   from   python   using   the   python-cpl   package.    See
       https://packages.python.org/python-cpl/index.html for further information.

       The  other  recipes  of  the  visir pipeline are visir_img_dark(7), visir_img_ff(7), visir_img_reduce(7),
       visir_img_trans(7),      visir_old_img_combine(7),      visir_old_img_phot(7),      visir_old_spc_obs(7),
       visir_old_spc_obs_ech(7),    visir_old_spc_phot(7),   visir_old_spc_phot_ech(7),   visir_old_spc_wcal(7),
       visir_old_spc_wcal_ech(7),  visir_old_util_destripe(7),  visir_spc_reduce(7),  visir_util_apply_calib(7),
       visir_util_clip(7),  visir_util_convert_weight(7), visir_util_detect_shift(7), visir_util_img_std_cat(7),
       visir_util_join(7),        visir_util_qc(7),        visir_util_repack(7),        visir_util_run_swarp(7),
       visir_util_spc_std_cat(7), visir_util_spc_txt2fits(7)

VERSION

       visir_util_undistort 4.3.8

AUTHOR

       Lars Lundin <usd-help@eso.org>

BUG REPORTS

       Please  report  any  problems  to  usd-help@eso.org. Alternatively, you may send a report to the ESO User
       Support Department <usd-help@eso.org>.

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