SMuK 2023 – wissenschaftliches Programm
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UP: Fachverband Umweltphysik
UP 6: Poster
UP 6.4: Poster
Mittwoch, 22. März 2023, 17:30–19:00, HSZ OG1
Investigation of a method to analyse OH(3-1) Mesopause temperature and two-dimensional imager data of the OH-airglow layer — •Lukas Depenthal1, Christian von Savigny1, Christoph Hoffmann1, and Philipp Mattern2 — 1Institute of Physics, University of Greifswald, Greifswald, Germany — 2Leibniz Institute for Plasma Science and Technology, Greifswald, Germany
The University of Greifswald operates two instruments to measure airglow emissions at an altitude of about 87 km. The Andor Shamrock SR-163 Infrared spectrometer is used to detect OH-Meinel bands at 1500 nm - 1600 nm as OH(3-1) rotational-vibrational spectroscopy. Based on the relative intensities of the OH(3-1)-lines, conclusions about the mesopause temperature are drawn and examined with regard to their variability. Based on these investigations, dynamic processes in the mesopause can be investigated. Since the spectrometer has a temporal resolution of 15 s, variations with periods of about 5-20 minutes can be determined. The ongoing measurements started in 2015.
In addition, a Xenics Cheetah 640CL infrared camera is used as an OH airglow imager to visualize spatial structures and gravity wave signatures within the OH airglow layer. With a resolution of 640 x 512 pixels, wavelengths of several kilometers can be observed. These measurements started in August 2020 and have continued since then. Using principal component analysis, it is possible to determine periods of about 5-20 minutes, as in the spectrometer data. Due to the side by side installation of the instruments, the data can be compared with each other.