Automatically guiding a telescope to a laser beam on a biaxial antarctic light detection and ranging system
The operating principle of atmospheric Rayleigh LIDAR (light detection and ranging) systems is that the range-corrected return-backscatter signal is directly related to atmospheric density. For this to be the case full overlap is required between the backscattered laser signal and the field of view...
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Online Access: | http://hdl.handle.net/2440/89873 https://doi.org/10.1117/1.2801411 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/89873 2023-12-17T10:20:40+01:00 Automatically guiding a telescope to a laser beam on a biaxial antarctic light detection and ranging system Innis, J. Cunningham, A. Graham, A. Klekociuk, A. 2007 http://hdl.handle.net/2440/89873 https://doi.org/10.1117/1.2801411 en eng SPIE Optical Engineering, 2007; 46(11):16001-1-16001-8 0091-3286 1560-2303 http://hdl.handle.net/2440/89873 doi:10.1117/1.2801411 Klekociuk, A. [0000-0003-3335-0034] © 2007 SPIE http://dx.doi.org/10.1117/1.2801411 LIDAR LIDAR alignment autoguiding telescopes Journal article 2007 ftunivadelaidedl https://doi.org/10.1117/1.2801411 2023-11-20T23:17:38Z The operating principle of atmospheric Rayleigh LIDAR (light detection and ranging) systems is that the range-corrected return-backscatter signal is directly related to atmospheric density. For this to be the case full overlap is required between the backscattered laser signal and the field of view of the receive telescope. Time-dependent errors in this alignment compromise the experimental method, and confuse the interpretation of geophysical signals present in the data. We describe a means of locking the alignment of a small LIDAR telescope to the backscattered laser beam, using images obtained with a commercial charge-coupled device camera, to reduce the effects of relative movement of telescope and laser on field overlap. This “autoguiding” system is implemented on a biaxial Rayleigh LIDAR in operation in Antarctica. We achieve a positional precision near 3 camera pixels (1 pixel ~ 1 arc) across the beam, and 7 camera pixels along the beam. Positional corrections are generated once per minute. The system is capable of removing medium- and long-term drifts in the relative alignment of our telescope and laser during an observing run. John Innis, Andrew Cunningham, Anthony Graham, Andrew Klekociuk Article in Journal/Newspaper Antarc* Antarctic Antarctica The University of Adelaide: Digital Library Antarctic Optical Engineering 46 11 116001 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
LIDAR LIDAR alignment autoguiding telescopes |
spellingShingle |
LIDAR LIDAR alignment autoguiding telescopes Innis, J. Cunningham, A. Graham, A. Klekociuk, A. Automatically guiding a telescope to a laser beam on a biaxial antarctic light detection and ranging system |
topic_facet |
LIDAR LIDAR alignment autoguiding telescopes |
description |
The operating principle of atmospheric Rayleigh LIDAR (light detection and ranging) systems is that the range-corrected return-backscatter signal is directly related to atmospheric density. For this to be the case full overlap is required between the backscattered laser signal and the field of view of the receive telescope. Time-dependent errors in this alignment compromise the experimental method, and confuse the interpretation of geophysical signals present in the data. We describe a means of locking the alignment of a small LIDAR telescope to the backscattered laser beam, using images obtained with a commercial charge-coupled device camera, to reduce the effects of relative movement of telescope and laser on field overlap. This “autoguiding” system is implemented on a biaxial Rayleigh LIDAR in operation in Antarctica. We achieve a positional precision near 3 camera pixels (1 pixel ~ 1 arc) across the beam, and 7 camera pixels along the beam. Positional corrections are generated once per minute. The system is capable of removing medium- and long-term drifts in the relative alignment of our telescope and laser during an observing run. John Innis, Andrew Cunningham, Anthony Graham, Andrew Klekociuk |
format |
Article in Journal/Newspaper |
author |
Innis, J. Cunningham, A. Graham, A. Klekociuk, A. |
author_facet |
Innis, J. Cunningham, A. Graham, A. Klekociuk, A. |
author_sort |
Innis, J. |
title |
Automatically guiding a telescope to a laser beam on a biaxial antarctic light detection and ranging system |
title_short |
Automatically guiding a telescope to a laser beam on a biaxial antarctic light detection and ranging system |
title_full |
Automatically guiding a telescope to a laser beam on a biaxial antarctic light detection and ranging system |
title_fullStr |
Automatically guiding a telescope to a laser beam on a biaxial antarctic light detection and ranging system |
title_full_unstemmed |
Automatically guiding a telescope to a laser beam on a biaxial antarctic light detection and ranging system |
title_sort |
automatically guiding a telescope to a laser beam on a biaxial antarctic light detection and ranging system |
publisher |
SPIE |
publishDate |
2007 |
url |
http://hdl.handle.net/2440/89873 https://doi.org/10.1117/1.2801411 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
http://dx.doi.org/10.1117/1.2801411 |
op_relation |
Optical Engineering, 2007; 46(11):16001-1-16001-8 0091-3286 1560-2303 http://hdl.handle.net/2440/89873 doi:10.1117/1.2801411 Klekociuk, A. [0000-0003-3335-0034] |
op_rights |
© 2007 SPIE |
op_doi |
https://doi.org/10.1117/1.2801411 |
container_title |
Optical Engineering |
container_volume |
46 |
container_issue |
11 |
container_start_page |
116001 |
_version_ |
1785524886895067136 |