SMuK 2023 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 6: Poster

UP 6.1: Poster

Mittwoch, 22. März 2023, 17:30–19:00, HSZ OG1

Straylight characterization of airborne imaging remote sensing instruments of the MAMAP2D family for greenhouse gas observations — •Oke Huhs, Konstantin Gerilowski, Sven Krautwurst, Jakob Borchardt, Heinrich Bovensmann, and John P. Burrows — University of Bremen, Institute of Environmental Physics, Otto-Hahn-Allee 1, 28359 Bremen, Germany

Airborne measurements of atmospheric column enhancements of methane (CH₄) and carbon dioxide (CO₂) from anthropogenic point sources were performed with the Methane Airborne MAPer (MAMAP) since 2007, which delivers 1D spatial data by measuring the spectrum of backscattered solar radiation. To measure 2D spatial data from a single overflight, a new generation of passive airborne imaging remote sensing grating spectrometers is being developed and built by IUP Bremen. The MAMAP2D-Light instrument was already successfully flown during the COMET 2.0 Arctic campaign in Canada in summer 2022 measuring CO₂ and CH₄ enhancements in a short-wave infrared band around 1.6 µm. The MAMAP2D instrument, which has an additional near-infrared O2A-band channel and a higher spectral resolution, has delivered measurement data in a laboratory environment. For the characterization of remote sensing instruments, straylight is one important quantity. Straylight occurs due to reflections and scattering within the spectrometer and must be characterized well to establish a straylight correction. Therefore, straylight was characterized down to 7 orders of magnitude below the integrated incident illumination level for MAMAP2D and MAMAP2D-Light.