A preliminary semiempirical thermosphere model of Mars: DTM-Mars

The DTM-2013 thermosphere model

Aims – The Drag Temperature Model (DTM) is a semi-empirical model describing the temperature, density, and composition of the Earth’s thermosphere. DTM2013 was developed in the framework of the Advanced Thermosphere Modelling and Orbit Prediction project (ATMOP). It is evaluated and compared with DTM2009, the pre-ATMOP benchmark, and the Committe on Space Research (COSPAR) reference model for a...

Winter Polar Warming in the Mars Thermosphere

Interannual Variability of the Mars Thermosphere: New Simulations and Comparisons with Recent Mars Datasets

Detailed studies exist that explore the global, seasonal, and interannual variations of the Martian lower atmosphere (below 90 km) [e.g. Liu et al., 2003]. Key findings indicate that observed temperatures are quite repeatable from one Mars aphelion season to the next. Conversely, perihelion temperatures can change radically on an interannual basis, depending on the timing and intensity of dust ...

MARS Attacks! Preliminary Cryptanalysis of Reduced-Round MARS Variants

In this paper, we discuss ways to attack various reducedround variants of MARS. We consider cryptanalysis of two reducedround variants of MARS: MARS with the full mixing layers but fewer core rounds, and MARS with each of the four kinds of rounds reduced by the same amount. We develop some new techniques for attacking both of these MARS variants. Our best attacks break MARS with full mixing and...

Camera Orientation of Mars Express Using DTM Information

In January 2004 the High Resolution Stereo Camera (HRSC) on board the ESA mission Mars Express started imaging the surface of planet Mars in colour and stereoscopically in high resolution. The Institute of Photogrammetry and GeoInformation (IPI) of the University of Hannover and the Chair for Photogrammetry and Remote Sensing (LPF) of the Technische Universität München are jointly processing th...