Simulation of Observed Magnetic Holes in the MagnetosheathMagnetic holes have been frequently observed in the magnetosheath of Earth and it is believed that these structures are the result of nonlinear evolution of mirror instability. Mirror mode…Narges Ahmadi, Kai Germaschewski, Joachim Raeder·Apr 1, 2017SaveLearn
Prediction of SYMH and ASYH indices for geomagnetic storms of solar cycle 24 including recent St. Patrick's day, 2015 storm using NARX neural networkArtificial Neural Network (ANN) has proven to be very successful in forecasting variety of irregular magnetospheric/ionospheric processes like geomagnetic storms and substorms. SYMH and ASYH indices…Ankush Bhaskar, Geeta Vichare·Mar 30, 2017SaveLearn
Cosmic Ray Diffusion Coefficients Throughout The Inner Heliosphere From Global Solar Wind SimulationWe use a three-dimensional magnetohydrodynamic simulation of the solar wind to calculate cosmic ray diffusion coefficients throughout the inner heliosphere (2~R - 3 AU). The simulation…Rohit Chhiber, Prachanda Subedi, Arcadi V. Usmanov et al.·Mar 30, 2017SaveLearn
The Galactic Cosmic Ray Electron Spectrum from 3 to 70 MeV Measured by Voyager 1 Beyond the Heliopause, What This Tells Us About the Propagation of Electrons and Nuclei In and Out of the Galaxy at Low EnergiesThe cosmic ray electrons measured by Voyager 1 between 3-70 MeV beyond the heliopause have intensities several hundred times those measured at the Earth by PAMELA at nearly the same energies. This…W. R. Webber, T. L. Villa·Mar 30, 2017SaveLearn
Preliminary orbits with line-of-sight correction for LEO satellites observed with radarWe propose a method to account for the Earth oblateness effect in preliminary orbit determination of satellites in low orbits with radar observations. This method is an improvement of the one…Helene Ma, Giovanni F. Gronchi, Davide Bracali Cioci·Mar 23, 2017SaveLearn
On the estimation of the current density in space plasmas: multi versus single-point techniquesThanks to multi-spacecraft mission, it has recently been possible to directly estimate the current density in space plasmas, by using magnetic field time series from four satellites flying in a quasi…Silvia Perri, Francesco Valentini, Luca Sorriso-Valvo et al.·Mar 23, 2017SaveLearn
Asteroid Impact Effects And Their Immediate Hazards For Human PopulationsA set of 50,000 artificial Earth impacting asteroids was used to obtain, for the first time, information about the dominance of individual impact effects such as wind blast, overpressure shock,…Clemens M. Rumpf, Hugh G. Lewis, Peter M. Atkinson·Mar 22, 2017SaveLearn
Mirror instability in the turbulent solar windThe relationship between a decaying strong turbulence and the mirror instability in a slowly expanding plasma is investigated using two-dimensional hybrid expanding box simulations. We impose an…P. Hellinger, S. Landi, L. Matteini et al.·Mar 17, 2017SaveLearn
On the Pulse Shape of Ground Level EnhancementsWe study the temporal intensity profile, or pulse shape, of cosmic ray ground level enhancements (GLEs) by calculating the rise (τr) and decay (τd) times for a small subset of…R. D. Strauss, O. Ogunjobi, H. Moraal et al.·Mar 17, 2017SaveLearn
The Sun's Fast Dynamo ActionWe provide a synthesis model demonstrating the "fast dynamo" action of the Sun. The latter is essentially accomplished via two toroidal structures presumably formed in the tachocline and…D. V. Sarafopoulos·Mar 15, 2017SaveLearn
Hybrid SGP4 orbit propagatorTwo-Line Elements (TLEs) continue to be the sole public source of orbiter observations. The accuracy of TLE propagations through the Simplified General Perturbations-4 (SGP4) software decreases…Juan Félix San-Juan, Iván Pérez, Montserrat San-Martín et al.·Mar 10, 2017SaveLearn
Whistler mode waves upstream of SaturnWhistler-mode waves are generated within and can propagate upstream of collisionless shocks. They are known to play a role in electron thermodynamics/acceleration and, under certain conditions, are…Ali H Sulaiman, Donald A Gurnett, Jasper S Halekas et al.·Mar 10, 2017SaveLearn
On Kinetic Slow Modes, Fluid Slow Modes, and Pressure-balanced Structures in the Solar WindObservations in the solar wind suggest that the compressive component of inertial-range solar-wind turbulence is dominated by slow modes. The low collisionality of the solar wind allows for…Daniel Verscharen, Christopher H. K. Chen, Robert T. Wicks·Mar 8, 2017SaveLearn
FRiED: A novel three-dimensional model of coronal mass ejectionsWe present a novel three-dimensional (3D) model of coronal mass ejections (CMEs) that unifies all key evolutionary aspects of CMEs and encapsulates their 3D magnetic field configuration. This fully…Alexey Isavnin·Mar 5, 2017SaveLearn
Digital Cellular Solid Pressure Vessels: A Novel Approach for Human Habitation in SpaceIt is widely assumed that human exploration beyond Earth's orbit will require vehicles capable of providing long-duration habitats that simulate an Earthlike environment: consistent artificial…Daniel Cellucci, Benjamin Jenett, Kenneth C. Cheung·Feb 21, 2017SaveLearn
How Anomalous Resistivity Accelerates Magnetic ReconnectionWhether turbulence induced anomalous resistivity (AR) can facilitate a fast magnetic reconnection in collisionless plasma is a subject of active debate for decades. Recent space observations suggest…H. Che·Feb 20, 2017SaveLearn
The Twist of the Draped Interstellar Magnetic Field Ahead of the Heliopause: A Magnetic Reconnection Driven Rotational DiscontinuityBased on the difference between the orientation of the interstellar BISM and the solar magnetic fields, there was an expectation that the magnetic field direction would rotate dramatically…M. Opher, J. F. Drake, M. Swisdak et al.·Feb 20, 2017SaveLearn
Population Vulnerability Models for Asteroid Impact Risk AssessmentAn asteroid impact is a low probability event with potentially devastating consequences. The Asteroid Risk Mitigation Optimization and Research (ARMOR) software tool calculates whether a colliding…Clemens M. Rumpf, Hugh G. Lewis, Peter M. Atkinson·Feb 19, 2017SaveLearn
Chaos Control with Ion PropulsionThe escape dynamics around the triangular Lagrangian point L5 in the real Sun-Earth-Moon-Spacecraft system is investigated. Appearance of the finite time chaotic behaviour suggests that widely used…Judit Sliz, Tamas Kovacs, Aron Suli·Feb 17, 2017SaveLearn
Experimental overview on Future Solar and Heliospheric researchSolar and heliospheric cosmic rays provide a unique perspective in cosmic ray research: we can observe not only the particles, but also the properties of the plasmas in which the they are accelerated…T. Laitinen·Feb 16, 2017SaveLearn
Compact Modeling and Simulation of Heavy Ion Induced Soft Error Rate in Space Environment: Principles and ValidationA simple physical model for calculation of the ion-induced soft error rate in space environment has been proposed, based on the phenomenological cross section notion. Proposed numerical procedure is…Gennady I. Zebrev, Artur M. Galimov·Feb 16, 2017SaveLearn
Centennial evolution of monthly solar wind speeds: Fastest monthly solar wind speeds from long-duration coronal holesHigh speed solar wind streams (HSSs) are very efficient drivers of geomagnetic activity at high latitudes. In this paper we use a recently developed ΔH parameter of geomagnetic activity,…Renata Lukianova, Lauri Holappa, Kalevi Mursula·Feb 13, 2017SaveLearn
On the origin of the crescent-shaped distributions observed by MMS at the magnetopauseMMS observations recently confirmed that crescent-shaped electron velocity distributions in the plane perpendicular to the magnetic field occur in the electron diffusion region near reconnection…G. Lapenta, J. Berchem, M. Zhou et al.·Feb 12, 2017SaveLearn
The formation of magnetic depletions and flux annihilation due to reconnection in the heliosheathThe misalignment of the solar rotation axis and the magnetic axis of the Sun produces a periodic reversal of the Parker spiral magnetic field and the sectored solar wind. The compression of the…J. F. Drake, M. Swisdak, M. Opher et al.·Feb 6, 2017SaveLearn
Colliding Alfvénic wave packets in MHD, Hall and kinetic simulationsThe analysis of the Parker-Moffatt problem, recently revisited in Pezzi et al. (2016), is here extended by including the Hall magnetohydrodynamics and two hybrid kinetic Vlasov-Maxwell numerical…O. Pezzi, T. N. Parashar, S. Servidio et al.·Feb 3, 2017SaveLearn