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Proceedings Paper

New design of a Multi-Order Etalon Sounder for measuring stratospheric temperature profiles
Author(s): William B. Cook; George H. Lindquist
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Paper Abstract

Sounding the stratosphere using the 4.3 micrometers CO2 lines requires observations where radiance contributions from the very thin upper atmosphere form a significant part of the measured signal. In order to properly account for the influence of these extremely narrow emission features in the temperature retrievals, extremely high spectral resolution is required. The multi-order etalon sounder (MOES) is an instrument which capitalizes on the extremely high spectral resolution achievable with a standard Fabry-Perot etalon and on the regular spacing of the lines in portions of the vibration-rotation spectrum of gases such as CO2. The MOES instrument simultaneously measures several identically shaped CO2 lines when its etalon spacing is set to produce a free spectral range equal to the uniform line intervals in the spectrum. By combining the signals from a large number of lines a MOES sensor greatly improves the signal-to-noise ratio without reducing its inherent spectral resolution. A detailed design for the most recent MOES concept is presented along with its expected/simulated performance parameters.

Paper Details

Date Published: 31 October 1996
PDF: 9 pages
Proc. SPIE 2830, Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research II, (31 October 1996); doi: 10.1117/12.256117
Show Author Affiliations
William B. Cook, Univ. of Michigan (United States)
George H. Lindquist, Optimetrics, Inc. (United States)

Published in SPIE Proceedings Vol. 2830:
Optical Spectroscopic Techniques and Instrumentation for Atmospheric and Space Research II
Paul B. Hays; Jinxue Wang, Editor(s)

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