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A Fabry–Perot interferometer-based camera for two-dimensional mapping of SO2 distributions

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posted on 2015-07-13, 14:32 authored by Leif H. H. Vogel, J. Kuhn, N. Bobrowski, P. Lübcke, U. Platt
We examine a new imaging method for the remote sensing of volcanic gases, which relies on the regularly spaced narrow-band absorption structures in the UV–VIS of many molecules. A Fabry–Perot interferometer (FPI) is used to compare the scattered sunlight radiance at wavelengths corresponding to absorption bands with the radiance at wavelengths in between the bands, thereby identifying and quantifying the gas. In this first theoretical study, we present sample calculations for the detection of sulfur dioxide (SO[subscript: 2]). Optimum values for the FPI setup parameters are proposed. Furthermore, the performance of the FPI method is compared to SO[subscript: 2] cameras. We show that camera systems using an FPI are far less influenced by changes in atmospheric radiative transfer (e.g., due to aerosol) and have a great potential as a future technique for examining emissions of SO[subscript: 2] (or other gases) from volcanic sources and other point sources.

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Citation

Atmospheric Measurement Techniques, 2014, 7, pp. 3705-3715

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

  • VoR (Version of Record)

Published in

Atmospheric Measurement Techniques

Publisher

Copernicus Publications on behalf of the European Geosciences Union

issn

1867-8548

eissn

1867-8548

Acceptance date

2014-09-20

Copyright date

2014

Available date

2015-07-13

Publisher version

http://www.atmos-meas-tech.net/7/3705/2014/amt-7-3705-2014.html

Language

en

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