Automated ground-based star-pointing UV -visible spectrometer for stratospheric measurements

A novel automated ground-based star-pointing spectrometer system has been constructed for long-term deployment in Antarctica. Similar to our earlier stellar system, a two-dimensional detector array measures the spectra of the star and the adjacent sky, so that auroral emission from the sky can be su...

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Published in:Applied optics (2004) 1997-08, Vol.36 (24), p.6069-6075
Main Authors: Roscoe, H K, Taylor, W H, Evans, J D, Tait, A M, Freshwater, R, Fish, D, Strong, E K, Jones, R L
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Language:English
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container_end_page 6075
container_issue 24
container_start_page 6069
container_title Applied optics (2004)
container_volume 36
creator Roscoe, H K
Taylor, W H
Evans, J D
Tait, A M
Freshwater, R
Fish, D
Strong, E K
Jones, R L
description A novel automated ground-based star-pointing spectrometer system has been constructed for long-term deployment in Antarctica. Similar to our earlier stellar system, a two-dimensional detector array measures the spectra of the star and the adjacent sky, so that auroral emission from the sky can be subtracted from the stellar signal. Some new features are an altitude -azimuth pointing mirror, so that the spectrometer does not move; slip rings to provide its power thereby avoiding flexing of cables and restriction of all-around viewing; and a glazed enclosure around the mirror to ensure protection from rain and snow, made from flat plates to avoid changing the focal length of the telescope. The optical system can also view sunlight scattered from the zenith sky. The system automatically points and tracks selected stars and switches to other views on command. The system is now installed at Halley in Antarctica, and some preliminary measurements of ozone from Antarctica are shown.
doi_str_mv 10.1364/AO.36.006069
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title Automated ground-based star-pointing UV -visible spectrometer for stratospheric measurements
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