Berlin 2012 – wissenschaftliches Programm

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UP: Fachverband Umweltphysik

UP 9: Poster session

UP 9.18: Poster

Mittwoch, 28. März 2012, 18:30–19:15, Poster F

Aircraft measurements of anthropogenic NO₂ with an imaging DOAS instrument — •Anja Schönhardt, Patricia Altube, Andreas Richter, Sven Krautwurst, Konstantin Gerilowski, and John Burrows — IUP, University of Bremen, Germany

A new airborne imaging DOAS (Differential Optical Absorption Spectroscopy) instrument has been developed recently and is applied for the measurement of anthropogenic NO₂. The instrument is based on a grating spectrometer optimized for the visible wavelength region and uses entrance optics consisting of a wide angle objective and a light guide with sorted fibres. A broad spatial stripe below the aircraft distributed into several separate viewing directions is observed at the same time, and the instrument setup allows flexible positioning within the aircraft. The optical design as well as the spectral and spatial imaging characteristics are presented. First test flights and evaluations of NO₂ slant columns have been conducted and show a good performance. One presented example of application is the measurement of NO₂ in the exhaust plume of a power plant. The suitability for mapping of anthropogenic NO₂ on a small spatial scale (∼100m) is demonstrated.