Search Publications
EMVIM: An empirical model for the magnetic field configuration near Venus
He, Maosheng; Vogt, Joachim; Zhang, Tielong +1 more
More than 2000 orbits of Venus Express magnetic field measurements are condensed into Empirical Model of Venusian Induced Magnetic fields (EMVIM), an empirical model to quantify the magnetic configuration in the Venusian magnetosphere at low altitude (<500 km) as a function of the upstream solar wind magnetic field (IMF components) and the sola…
O+ and H+ above the polar cap: Observations and semikinetic simulations
Nilsson, H.; Slapak, R.; Barghouthi, I. A. +1 more
A one-dimensional direct simulation Monte Carlo model is used to study the outflow of O+ and H+ ions from 1.2 RE to 15.2 RE along two flight trajectories originating from the polar cap, namely, the central polar cap (CPC) and the cusp. To study the effect of varying geophysical conditions and to deduce t…
Determination of the shape and orientation of nonlinear magnetic structures measured by Cluster spacecraft in the vicinity of the bow shock
Grzesiak, Marcin; Przepiórka, Dorota; Strumik, Marek +1 more
We present a new method of determination of the size and the orientation of nonlinear electromagnetic structures observed in space plasmas. The method is based on the analysis of covariance matrix of gradients of fields estimated from multipoint spacecraft measurements. It does not make use of Taylor hypothesis and gives fully three-dimensional es…
Reply to comment by Pätzold et al. on "Mars Express radio-occultation data: A novel analysis approach"
Witasse, O.; Blelly, P. -L.; Grandin, M. +1 more
We reply to the Comment by Pätzold et al. on our paper presenting a new analysis approach for Mars Express radio-occultation data. We address each of the main comments, showing that none of them invalidates the method itself, but rather, they underline aspects which could be considered to improve the model. One major issue raised by the Comment is…
Comment on the paper "Mars Express radio occultation data: A novel analysis approach" by Grandin et al. (2014)
Pätzold, M.; Bird, M. K.; Häusler, B. +3 more
In their recent paper, Grandin et al. (2014) claim to have developed a novel approach, principally a ray tracing method, to analyze radio sounding data from occulted spacecraft signals by planetary atmospheres without the usual assumptions of the radio occultation inversion method of a stratified, layered, symmetric atmosphere. They apply their "n…