Direct wind measurements from November 2007 in Venus' upper atmosphere using ground-based heterodyne spectroscopy of CO2 at 10 μm wavelength

► Dynamics in the upper atmosphere of Venus by measuring the Doppler shift. ► Narrow altitude region in Venus' atmosphere around 110 ± 10 km (1 lbar). ► The results show no significant zonal wind velocity at the equator. ► An increase with latitude up to 43 ± 13 m/s at a latitude of 33N was observed. ► Maximum cross terminator velocity of the sub-solar-to-antisolar flow at 72 ± 47 m/s.