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    New AOTF-based instrumental concepts for atmospheric science

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    Authors
    Dekemper, E.
    Vanhamel, J.
    Kastelik, J.-C.
    Pereira, N.
    Bolsée, D.
    Cessateur, G.
    Lamy, H.
    Fussen, D.
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    Discipline
    Physical sciences
    Subject
    AOTF
    acousto-optic
    atmosphere
    remote sensing
    aurora
    solar spectral irradiance
    nitrogen dioxide
    NO2
    Audience
    Scientific
    Date
    2019
    Metadata
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    Description
    Acousto-optical tunable filters (AOTFs) are still little known to the Earth atmosphere remote sensing community. The bulk of passive atmospheric remote sensing instruments remains divided into two families: those relying on interferometric techniques (mostly for the long-wave absorbing species), and those based on diffraction gratings (better suited for UV-VIS absorbing species). Still, AOTFs have some unique features which should deserve more attention, in particular their angular acceptance, and their polarization sensitivity. The first one because it allows to work in an imaging setup, the second because many atmospheric processes have a polarizing effect. In this paper, we will present different AOTF-based instrument concepts (or even prototypes) which take advantage of these features in order to improve the sate-of-the-art of measurement techniques in several fields of atmospheric science. We will first present the improved NO2 camera: its new capabilites, the subsystems which have been changed, and some preliminary results. Then, we will discuss two other potential applications: the study of the solar spectral irradiance variability in the UV, and the detection of auroral polarized emissions. For each concept, we will discuss the current challenges faced by the existing instruments, and analyze how the use of AOTFs could overcome them. A suggestion for the AOTF selection will be made, and the expected instrument performance will be estimated.
    Citation
    Dekemper, E.; Vanhamel, J.; Kastelik, J.-C.; Pereira, N.; Bolsée, D.; Cessateur, G.; Lamy, H.; Fussen, D. (2019). New AOTF-based instrumental concepts for atmospheric science. (Grulkowski, I., Ed.), Proceedings of SPIE: 11210 Fourteenth School on Acousto-Optics and Applications, 24-27 June 2019, Toruń, Poland, Vol. 11210, 112100S, DOI: 10.1117/12.2540981.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/7393
    doi: http://dx.doi.org/10.1117/12.2540981
    Type
    Conference
    Peer-Review
    No
    Language
    eng
    Links
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