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VISIR_UTIL_DETECT_SHIFT(7) visir recipes VISIR_UTIL_DETECT_SHIFT(7)

NAME

visir_util_detect_shift - 2012

SYNOPSIS

esorex visir_util_detect_shift [OPTIONS] FILE.sof

DESCRIPTION

Detects beams in a background subtracted multi-beam image, determines the shifts between different images and their correlation. Images can be rejected if their correlation is bad.

The files listed in the Set Of Frames (sof-file) must be tagged: VISIR-chopnod-corrected-file.fits BKG_CORRECTED bad-pixel-mask.fits STATIC_MASK The output consists of single beam images of the size of the throw. The shifts will be written int CRPIX[12].

OPTIONS

Correlation template used to detect shifts and reject bad images. If none given an averaged image is used (str; default: ´NONE´). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.template [default = NONE].
Minimal correlation to the template required to be accepted (float; default: 0.5). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.min-correlation [default = 0.5].
Maximal allowed object shift for an image to be accepted (float; default: 10.0). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.max-shift [default = 10.0].
Maximal allowed median absolute deviation for an image to be accepted. <= 0 equals no limit (float; default: 0.0). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.max-mad [default = 0.0].
Number of planes to average before attempting to detect the shifts. (int; default: 1). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.naverage [default = 1].
Method to determine beam shifts. xcorrelate: use the cross correlation shift. brightest: use the position of the brightest pixel (str; default: ´xcorrelate´). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.method [default = xcorrelate].
Sets whether to apply the determined shifts in following recipes. Set to TRUE of shifts appear too large. (bool; default: False). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.no-shift [default = False].
If true images with bad statistics will not be rejected and no shift correction is done (bool; default: True). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.no-reject [default = True].
Define the positions of the beams. These positions are cut by the window to extract the single beam images. Format: sign:x,y,window;sign:x,y,window;... where sign is "pos" or "neg" depending on whether the beam is positive or negative. The window is optional and defines the size of the cut image around the beam. The default window is the chop throw. E.g.: pos:50,60;neg:50,160; By default autodetection is attempted. (str; default: ´NONE´). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.beampos [default = NONE].
The maximum eccentricity allowed in the combination of the three (in parallel nod/chopping) or four (in perpendicular nod/chopping) beams. In parallel mode, three perfectly aligned points spaced with the chopnod throw will have eccentricity 0, while in perpedicular mode a square with the chopnod throw as the side length will have eccentricity 0 (float; default: 3.0). The full name of this option for the EsoRex configuration file is visir.visir_util_detect_shift.eccmax [default = 3.0].

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_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), visir_util_undistort(7)

VERSION

visir_util_detect_shift 4.4.2

AUTHOR

Find beam positions and reject bad images <Julian Tayor>

BUG REPORTS

Please report any problems to Julian Tayor. 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) https://support.eso.org 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

4.4.2 visir_util_detect_shift