First results of MIR spectroscopic investigations of the Venusian atmosphere by MERTIS during the two Venus flybys of the BepiColombo spacecraft

Gabriele E. Arnold; Rainer Haus; Joern Helbert; Mario D'Amore; Alessandro Maturilli; Harald Hiesinger

doi:10.1117/12.2632548

30 September 2022 First results of MIR spectroscopic investigations of the Venusian atmosphere by MERTIS during the two Venus flybys of the BepiColombo spacecraft

Gabriele E. Arnold, Rainer Haus, Joern Helbert, Mario D'Amore, Alessandro Maturilli, Harald Hiesinger

Author Affiliations +

Proceedings Volume 12233, Infrared Remote Sensing and Instrumentation XXX; 1223303 (2022) https://doi.org/10.1117/12.2632548
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

The BepiColombo spacecraft (ESA) on its way to Mercury has performed two flybys at Venus in October 2020 (FB1) and August 2021 (FB2). The pushbroom IR grating spectrometer (TIS) of the MERTIS (Mercury Radiometer and Thermal Infrared Spectrometer) instrument has recorded a large number of planetary radiation spectra of Venus in the spectral range 7-14 μm (715 - 1430 cm-1). MERTIS mid infrared spectra are the first spectrally resolved observations of Venus in the thermal spectral range longward of 5 μm since the Venera-15 Fourier spectrometer experiment FS-1/4 (PMV) in 1983. We report on the results of both flybys showing average radiance and brightness temperature spectra. Basing on a multi-channel radiative transfer simulation and retrieval algorithm we extract atmospheric temperature profiles and cloud parameters of Venus’ lower mesosphere (60-75 km). These results are compared to the former PMV studies.

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Gabriele E. Arnold, Rainer Haus, Joern Helbert, Mario D'Amore, Alessandro Maturilli, and Harald Hiesinger "First results of MIR spectroscopic investigations of the Venusian atmosphere by MERTIS during the two Venus flybys of the BepiColombo spacecraft", Proc. SPIE 12233, Infrared Remote Sensing and Instrumentation XXX, 1223303 (30 September 2022); https://doi.org/10.1117/12.2632548

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