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Proceedings Paper

Application of conventional CCD cameras with Fabry-Perot spectrometers for airglow observations
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Paper Abstract

This paper describes Fabry-Perot/CCD annular summing applied to airglow observations. Criteria are developed for determining the optimal rectangular format CCD chip configuration which minimizes dark and read noise. The relative savings in integration time of the imaging Fabry-Perot/CCD system over the pressure-scanned Fabry-Perot/PMT system is estimated for the optimal configuration through calculations of the signal to noise ratios for three extreme (but typical) cases of source and background intensity. The largest savings in integration time is estimated for the daysky thermospheric [O1D] (6300 angstrom) case where the bright (approximately equals 5 X 106R/A) Rayleigh-scattered background dominates the read noise. The long integration times required to obtain useful signal to noise ratios for the faint (approximately equals 10R) nightsky exospheric hydrogen Balmer-(alpha) (6563 angstrom) reduce the importance of the read noise term and yield large savings in integration time. The significance of the read noise term is greatly increased with the very short estimated integration times required for bright (approximately equals 200R) nightsky lines such as thermospheric [O1D]. Alternate CCD formats and applications methods that reduce read noise and provide improved performance in the latter case are compared against the CCD annular summing technique.

Paper Details

Date Published: 30 September 1994
PDF: 11 pages
Proc. SPIE 2266, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research, (30 September 1994); doi: 10.1117/12.187548
Show Author Affiliations
Monica M. Coakley, Univ. of Wisconsin/Madison (United States)
Fred L. Roesler, Univ. of Wisconsin/Madison (United States)


Published in SPIE Proceedings Vol. 2266:
Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research
Jinxue Wang; Paul B. Hays, Editor(s)

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