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Machine learning detection of dust impact signals observed by the Solar Orbiter

Mann, Ingrid; Vaverka, Jakub; Soucek, Jan +8 more

This article presents the results of automatic detection of dust impact signals observed by the Solar Orbiter - Radio and Plasma Waves instrument.

A sharp and characteristic electric field signal is observed by the Radio and Plasma Waves instrument when a dust particle impacts the spacecraft at high velocity. In this way, ∼ 5-20 dust impacts …

Effects of ion composition on escape and morphology on Mars

Zhang, Qi; Holmström, Mats; Wang, Xiao-Dong

We refine a recently presented method to estimate ion escape from non-magnetized planets and apply it to Mars. The method combines in situ observations and a hybrid plasma model (ions as particles, electrons as a fluid). We use measurements from the Mars Atmosphere and Volatile Evolution (MAVEN) mission and Mars Express (MEX) for one orbit on 1 Ma…

Revisiting mirror modes in the plasma environment of comet 67P/Churyumov-Gerasimenko

Goetz, Charlotte; Volwerk, Martin; Tello Fallau, Ariel +2 more

The plasma environment of comet 67P provides a unique laboratory to study plasma phenomena in the interplanetary medium. There, waves are generated which help the plasma relax back to stability through wave-particle interactions, transferring energy from the wave to the particles and vice versa. In this study, we focus on mirror-mode-like structur…

Statistical distribution of mirror-mode-like structures in the magnetosheaths of unmagnetized planets - Part 2: Venus as observed by the Venus Express spacecraft

Stenberg Wieser, Gabriella; Futaana, Yoshifumi; Mazelle, Christian +7 more

In this series of papers, we present statistical maps of mirror-mode-like (MM) structures in the magnetosheaths of Mars and Venus and calculate the probability of detecting them in spacecraft data. We aim to study and compare them with the same tools and a similar payload at both planets. We consider their dependence on extreme ultraviolet (EUV) s…

Local bow shock environment during magnetosheath jet formation: results from a hybrid-Vlasov simulation

Pfau-Kempf, Yann; Ganse, Urs; Battarbee, Markus +11 more

Magnetosheath jets are plasma structures that are characterised by enhanced dynamic pressure and/or plasma velocity. In this study, we investigate the formation of magnetosheath jets in four two-dimensional simulation runs of the global magnetospheric hybrid-Vlasov model Vlasiator. We focus on jets whose origins were not clearly determined in a pr…

Concerning the detection of electromagnetic knot structures in space plasmas using the wave telescope technique

Motschmann, Uwe; Glassmeier, Karl-Heinz; Toepfer, Simon

The wave telescope technique is broadly established in the analysis of spacecraft data and serves as a bridge between local measurements and the global picture of spatial structures. The technique is originally based on plane waves and has been extended to spherical waves, phase-shifted waves and planetary magnetic field representation. The goal o…

The m-dimensional spatial Nyquist limit using the wave telescope for larger numbers of spacecraft

Motschmann, Uwe; Plaschke, Ferdinand; Glassmeier, Karl-Heinz +2 more

Spacecraft constellations consisting of multiple satellites are becoming more and more interesting not only for commercial use but also for space science missions. The proposed and accepted scientific multi-satellite missions that will operate within Earth's magnetospheric environment, like HelioSwarm, require researchers to extend established met…

Velocity of magnetic holes in the solar wind from Cluster multipoint measurements

Raptis, Savvas; Karlsson, Tomas; Trollvik, Henriette

We present the first statistical study on the velocity of magnetic holes (MHs) in the solar wind. Magnetic holes are localized depressions of the magnetic field, often divided into two classes: rotational and linear MHs. We have conducted a timing analysis of observations of MHs from the Cluster mission in the first quarter of 2005. In total, 69 e…