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dc.contributor.authorDekemper, E.
dc.contributor.authorLoodts, N.
dc.contributor.authorVan Opstal, B.
dc.contributor.authorMaes, J.
dc.contributor.authorVanhellemont, F.
dc.contributor.authorMateshvili, N.
dc.contributor.authorFranssens, G.
dc.contributor.authorPieroux, D.
dc.contributor.authorBingen, C.
dc.contributor.authorRobert, C.
dc.contributor.authorDe Vos, L.
dc.contributor.authorAballea, L.
dc.contributor.authorFussen, D.
dc.descriptionWe describe a new spectral imaging instrument using a TeO2 acousto-optical tunable filter (AOTF) operating in the visible domain (450–900 nm). It allows for fast (∼1 second), monochromatic (FWHM ranges from 0.6 nm at 450 nm to 3.5 nm at 800 nm) picture acquisition with good spatial resolution. This instrument was designed as a breadboard of the visible channel of a new satellite-borne atmospheric limb spectral imager, named the Atmospheric Limb Tracker for the Investigation of the Upcoming Stratosphere (ALTIUS), that is currently being developed. We tested its remote sensing capabilities by observing the dense, turbulent plume exhausted by a waste incinerator stack at two wavelengths sensitive to NO2. An average value of 6.0±0.4×1017  molecules cm−2 has been obtained for the NO2 slant column density within the plume, close to the stack outlet. Although this result was obtained with a rather low accuracy, it demonstrates the potential of spectral imaging by using AOTFs in remote sensing.
dc.titleTunable acousto-optic spectral imager for atmospheric composition measurements in the visible spectral domain
dc.subject.frascatiPhysical sciences
dc.subject.freeAtmospheric composition
dc.subject.freeRemote sensing
dc.subject.freeAcousto-optical tunable filter
dc.subject.freeAverage values
dc.subject.freeComposition measurements
dc.subject.freeSlant column densities
dc.subject.freeSpatial resolution
dc.subject.freeSpectral domains
dc.subject.freeSpectral imaging
dc.subject.freeTurbulent plume
dc.subject.freeTwo wavelength
dc.subject.freeVisible channels
dc.subject.freeWaste incinerator
dc.subject.freeNitrogen oxides
dc.source.titleApplied Optics

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