Aalto-1, multi-payload CubeSat: design, integration and launchThe design, integration, testing, and launch of the first Finnish satellite Aalto-1 is briefly presented in this paper. Aalto-1, a three-unit CubeSat, launched into Sun-synchronous polar orbit at an…J. Praks, M. Rizwan Mughal, R. Vainio et al.·Jan 26, 2021SaveLearn
New cosmic ray observations at Syowa Station in the Antarctic for space weather studyMuon detectors and neutron monitors were recently installed at Syowa Station, in the Antarctic, to observe different types of secondary particles resulting from cosmic ray interactions simultaneously…C. Kato, W. Kihara, Y. Ko et al.·Jan 25, 2021SaveLearn
The Ion Transition Range of Solar Wind Turbulence in the Inner Heliosphere: Parker Solar Probe ObservationsThe scaling of the turbulent spectra provides a key measurement that allows to discriminate between different theoretical predictions of turbulence. In the solar wind, this has driven a large number…S. Y. Huang, F. Sahraoui, N. Andrés et al.·Jan 25, 2021SaveLearn
Development of a web application for monitoring solar activity and cosmic radiationThe flux of cosmic rays (CRs) in the heliosphere is subjected to remarkable time variations caused by the 11-year cycle of solar activity. To help the study of this effect, we have developed a web…David Pelosi, Nicola Tomassetti, Matteo Duranti·Jan 22, 2021SaveLearn
Observations of Short-Period Ion-Scale Current Sheet FlappingKink-like flapping motions of current sheets are commonly observed in the magnetotail. Such oscillations have periods of a few minutes down to a few seconds and they propagate toward the flanks of…L. Richard, Yu. V. Khotyaintsev, D. B. Graham et al.·Jan 21, 2021SaveLearn
Dust storm-enhanced gravity wave activity in the Martian thermosphere observed by MAVEN and implication for atmospheric escapeLower atmospheric global dust storms affect the small- and large-scale weather and variability of the whole Martian atmosphere. Analysis of the CO2 density data from the Neutral Gas and Ion Mass…Erdal Yiğit, Alexander S. Medvedev, Mehdi Benna et al.·Jan 19, 2021SaveLearn
A Peculiar ICME Event in August 2018 Observed with the Global Muon Detector NetworkWe demonstrate that global observations of high-energy cosmic rays contribute to understanding unique characteristics of a large-scale magnetic flux rope causing a magnetic storm in August 2018.…W. Kihara, K. Munakata, C. Kato et al.·Jan 19, 2021SaveLearn
On the Relation between Kappa Distribution Functions and the Plasma Beta Parameter in the Earth Magnetosphere: THEMIS observationsThe Earth's magnetosphere represents a natural plasma laboratory that allows us to study the behavior of particle distribution functions in the absence of Coulomb collisions, typically described by…Adetayo V. Eyelade, Marina Stepanova, Cristobal M. Espinoza et al.·Jan 18, 2021SaveLearn
Whistler wave occurrence and the interaction with strahl electrons during the first encounter of Parker Solar ProbeWe studied the properties and occurrence of narrow band whistler waves and their interaction with strahl electrons observed between 0.17 and 0.26 au during the first encounter of Parker Solar Probe.…V. K. Jagarlamudi, T. Dudok de Wit, C. Froment et al.·Jan 17, 2021SaveLearn
Parker Solar Probe evidence for scattering of electrons in the young solar wind by narrowband whistler-mode wavesObservations of plasma waves by the Fields Suite and of electrons by the Solar Wind Electrons Alphas and Protons Investigation (SWEAP) on Parker Solar Probe provide strong evidence for pitch angle…C. Cattell, A. Breneman, J. Dombeck et al.·Jan 13, 2021SaveLearn
Automated identification of current sheets -- a new tool to study turbulence and intermittency in the solar windWe propose a new method of the automated identification of current sheets (CSs) that represents a formalization of the visual inspection approach employed in case studies. CSs are often identified by…Olga Khabarova, Timothy Sagitov, Roman Kislov et al.·Jan 8, 2021SaveLearn
Radial profile of the polytropic index of solar wind plasma in the heliosphereWe combine different measurements of the polytropic index of the proton plasma in the heliosphere: i) near-adiabatic index in the inner heliosphere ~1AU, ii) subadiabatic indices in the outer…George Livadiotis·Dec 29, 2020SaveLearn
Semi-annual, annual and Universal Time variations in the magnetosphere and in geomagnetic activity: 4. Polar Cap motions and origins of the Universal Time effectWe use the am, an, as and the a-sigma geomagnetic indices to the explore a previously overlooked factor in magnetospheric electrodynamics, namely the inductive effect of diurnal motions of the…Mike Lockwood, Carl Haines, Luke A. Barnard et al.·Dec 24, 2020SaveLearn
Relationship between polytropic index and temperature anisotropy in space plasmasThe paper develops a theoretical relationship between the polytropic index and the temperature anisotropy that may characterize space plasmas. The derivation is based on the correlation among the…George Livadiotis, George Nicolaou·Dec 24, 2020SaveLearn
A comparison of methods for finding magnetic nulls in simulations and in situ observations of space plasmasMagnetic nulls are ubiquitous in space plasmas, and are of interest as sites of localized energy dissipation or magnetic reconnection. As such, a number of methods have been proposed for detecting…Vyacheslav Olshevsky, David Pontin, Benjamin Williams et al.·Dec 23, 2020SaveLearn
Effects of latitude-dependent gravity wave source variations on the middle and upper atmosphereAtmospheric gravity waves (GWs) are generated in the lower atmosphere by various weather phenomena. They propagate upward, carry energy and momentum to higher altitudes, and appreciably influence the…Erdal Yiğit, Alexander S. Medvedev, Manfred Ern·Dec 23, 2020SaveLearn
Comparative Analysis of the Solar Wind: Modeling Charge State Distributions in the HeliosphereNon-equilibrium ionization (NEI) is a key process often times neglected when modeling astrophysical plasmas with thermodynamical timescales much shorter than the timescales for ionization and…Marcus DuPont, Chengcai Shen, Nicholas A. Murphy·Dec 22, 2020SaveLearn
The efficiency of electron acceleration by ICME-driven shocksWe present a study of the acceleration efficiency of suprathermal electrons at collisionless shock waves driven by interplanetary coronal mass ejections (ICMEs), with the data analysis from both the…G. Qin, F. -J. Kong, S. -S. Wu·Dec 20, 2020SaveLearn
Characteristics of the Flank Magnetopause: THEMIS ObservationsThe terrestrial magnetopause is the boundary that shields the Earth's magnetosphere on one side from the shocked solar wind and its embedded interplanetary magnetic field on the other side. In this…S. Haaland, A. Runov, A. Artemyev et al.·Dec 17, 2020SaveLearn
Possible phase transition in plasma mirror modesMirror modes in collisionless high-temperature plasmas represent macroscopic high-temperature quasi-superconductors. We explicitly calculate the bouncing electron contribution to the ion-mode growth…R. A. Treumann, Wolfgang Baumjohann·Dec 15, 2020SaveLearn
Observations of Energized Electrons in the Martian MagnetosheathThis observational study demonstrates that the magnitude and location of energization of electrons in the Martian magnetosheath is more complex than previous studies suggest. Electrons in Mars's…K. Horaites, L. Andersson, S. J. Schwartz et al.·Dec 15, 2020SaveLearn
A Primer on Focused Solar Energetic Particle Transport: Basic physics and recent modelling resultsThe basics of focused transport as applied to solar energetic particles are reviewed, paying special attention to areas of common misconception. The micro-physics of charged particles interacting…J. P. van den Berg, R. D. Strauss, F. Effenberger·Dec 14, 2020SaveLearn
In situ multi-spacecraft and remote imaging observations of the first CME detected by Solar Orbiter and BepiColomboOn 2020 April 19 a coronal mass ejection (CME) was detected in situ by Solar Orbiter at a heliocentric distance of about 0.8 AU. The CME was later observed in situ on April 20th by the Wind and…E. E. Davies, C. Möstl, M. J. Owens et al.·Dec 14, 2020SaveLearn
In-Orbit Aerodynamic Coefficient Measurements using SOAR (Satellite for Orbital Aerodynamics Research)The Satellite for Orbital Aerodynamics Research (SOAR) is a CubeSat mission, due to be launched in 2021, to investigate the interaction between different materials and the atmospheric flow regime in…N. H. Crisp, P. C. E. Roberts, S. Livadiotti et al.·Dec 14, 2020SaveLearn
Kinetic Modeling of MagnetospheresThis paper presents the state of the art of kinetic modeling techniques for simulating plasma kinetic dynamics in magnetospheres. We describe the critical numerical techniques for enabling…Stefano Markidis, Vyacheslav Olshevsky, Gabor Toth et al.·Dec 11, 2020SaveLearn