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We examine a newimaging method for the remote sensing of volcanic gases, which relies on theregularly spaced narrow-band absorption structures in the UV–VIS of manymolecules. A Fabry–Perot interferometer (FPI) is used to compare thescattered sunlight radiance at wavelengths corresponding to absorption bandswith the radiance at wavelengths in between the bands, thereby identifyingand quantifying the gas. In this first theoretical study, we present samplecalculations for the detection of sulfur dioxide (SO2). Optimum values forthe FPI setup parameters are proposed. Furthermore, the performance of theFPI method is compared to SO2 cameras. We show that camera systems usingan 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 forexamining emissions of SO2 (or other gases) from volcanic sources andother point sources

A Fabry–Perot interferometer-based camera for two-dimensional mapping of SO&lt;sub&gt;2&lt;/sub&gt; distributions

A Fabry–Perot interferometer-based camera for two-dimensional mapping of SO<sub>2</sub> distributions