Wuppertal 2015 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 10: Planeten 1
EP 10.6: Vortrag
Donnerstag, 12. März 2015, 18:15–18:30, G.10.02 (HS 9)
Report on three Campaigns of Wind and Temperature Measurements of Venus’ Atmosphere by Ground-Based Heterodyne Observations at 10µm — •Carolin Wischnewski1,2, Manuela Sornig2, Guido Sonnabend3, Tobias Stangier3, Pia Krause1,2, and Moritz Wiegand1 — 1Universität zu Köln I. Physikalisches Institut, Köln, Deutschland — 2RIU - Abteilung für Planetenforschung, Köln, Deutschland — 3RPG Radiometer Physics GmbH, Meckenheim, Deutschland
We report on the three recent campaigns of wind and temperature measurements of Venus’ upper atmosphere during March and November 2013 and March 2014. The data are acquired by analyzing Doppler shifted non-LTE CO2 emission lines which are recorded by ground-based heterodyne observations at 10 µm.
From these emission lines we obtain wind velocities and temperatures in the Venusian atmosphere at 110 km altitude. To facilitate observations of these lines from the ground, we use heterodyne spectroscopy which is an eminent technique to provide reasonable high resolution (R ∝ 107).
Several plots which provide insight into the dynamics, the thermal structure and the temporal varibaility of the wind will be presented. Ongoing analysis of the wind variability and a comparison to previous groundbased measurements is in progress and will be presented at the conference.