Search Publications
Mars Express 10 years at Mars: Observations by the Mars Express Radio Science Experiment (MaRS)
Pätzold, M.; Hahn, M.; Rosenblatt, P. +17 more
The Mars Express spacecraft is operating in Mars orbit since early 2004. The Mars Express Radio Science Experiment (MaRS) employs the spacecraft and ground station radio systems (i) to conduct radio occultations of the atmosphere and ionosphere to obtain vertical profiles of temperature, pressure, neutral number densities and electron density, (ii…
Exploring the Venus global super-rotation using a comprehensive general circulation model
Read, P. L.; Mendonça, J. M.
The atmospheric circulation in Venus is well known to exhibit strong super-rotation. However, the atmospheric mechanisms responsible for the formation of this super-rotation are still not fully understood. In this work, we developed a new Venus general circulation model to study the most likely mechanisms driving the atmosphere to the current obse…
Dynamics of planetary ions in the induced magnetospheres of Venus and Mars
Luhmann, J. G.; Brain, D. A.; Jarvinen, R.
We compare dynamics of planetary ions in the induced magnetospheres of Venus and Mars in a global hybrid simulation to study factors controlling the ion escape at unmagnetized planets. In the simulation we find that the finite Larmor radius (FLR) effects of escaping heavy ions are stronger at Mars than Venus under nominal solar wind conditions. Bu…
Separation of dynamic and isostatic components of the Venusian gravity and topography and determination of the crustal thickness of Venus
Yang, An; Huang, Jinshui; Wei, Daiyun
Assuming that the long-wavelength geoid and topography of Venus are supported by both mantle convection and Airy isostasy, we propose a method to separate the dynamic and isostatic components of the Venusian gravity and topography with the aid of the dynamic admittance from numerical models of mantle convection and the isostatic admittance from an…
The morphology of the topside ionosphere of Mars under different solar wind conditions: Results of a multi-instrument observing campaign by Mars Express in 2010
Fränz, M.; Pätzold, M.; Wild, J. A. +17 more
Since the internally-generated magnetic field of Mars is weak, strong coupling is expected between the solar wind, planetary magnetosphere, and planetary ionosphere. However, few previous observational studies of this coupling incorporated data that extended from the solar wind to deep into the ionosphere. Here we use solar wind, magnetosphere, an…
IR heterodyne spectrometer MILAHI for continuous monitoring observatory of Martian and Venusian atmospheres at Mt. Haleakalā, Hawaii
Aoki, Shohei; Kasaba, Yasumasa; Taguchi, Makoto +11 more
A new Mid-Infrared Laser Heterodyne Instrument (MILAHI) with >106 resolving power at 7-12 µm was developed for continuous monitoring of planetary atmospheres by using dedicated ground-based telescopes for planetary science at Mt. Haleakalā, Hawaii. Room-temperature-type quantum cascade lasers (QCLs) that cover wavelength ranges…