Analysis of NASA’s DSN Venus Express radio occultation data for year 2014

The Venus Express Radio Science Experiment (VeRa) was part of the scientific payload (VEX) spacecraft and targeted at investigation Venus’ atmosphere, surface, gravity field as well interplanetary medium. This paper describes methods required calibrations applied to VEX-VeRa raw radio occultation data used retrieve vertical profiles ionosphere neutral atmosphere. In this work we perform an independent analysis a set 25 VEX, single-frequency (X-band), occultations carried out in 2014, recorded open-loop NASA Deep Space Network. Our temperature, pressure electron density are agreement with previous studies available literature. Furthermore, our shows that is more influenced by day/night condition than latitude variations, while atmosphere experiences opposite. interpretation these results based on two major responsible effects: high thermal inertia zonal winds. Their presence within determine why regions dependence predominant condition. On contrary, higher altitudes aforementioned effects less important or null, peaks probed day-time occultations, regardless latitude.