Solar Energetic Particle Events with Protons above 500 MeV between 1995 and 2015 Measured with SOHO/EPHINThe Sun is an effective particle accelerator producing solar energetic particle (SEP) events during which particles up to several GeVs can be observed. Those events observed at Earth with the neutron…Patrick Kühl, Nina Dresing, Bernd Heber et al.·Nov 10, 2016SaveLearn
Space weather research and forecast in USAIn the United States, scientific research in space weather is funded by several Government Agencies including the National Science Foundation (NSF) and the National Aeronautics and Space Agency…Alexei A. Pevtsov·Nov 8, 2016SaveLearn
Nanograin densities outside Saturn's A-ringThe observed disparity between the radial dependence of the ion and electron densities measured by the Cassini plasma and radio science instruments are used to show that the region between the outer…Robert E Johnson, Wei-Lin Tseng, Meredith K Elrod et al.·Nov 8, 2016SaveLearn
Inverting OII 83.4 nm Dayglow Profiles Using Markov Chain Radiative TransferEmission profiles of the resonantly scattered OII~83.4~nm triplet can in principle be used to estimate \(O+\) density profiles in the F2 region of the ionosphere. Given the emission source…George Geddes, Ewan Douglas, Susanna C. Finn et al.·Nov 7, 2016SaveLearn
Evaluation of Ionospheric Densities Using Coincident OII 83.4 nm Airglow and the Millstone Hill RadarWe test the utility of the OII 83.4 nm emission feature as a measure of ionospheric parameters. Observed with the Remote Atmospheric and Ionospheric Detection System (RAIDS) Extreme Ultraviolet…Ewan S. Douglas, Steve M. Smith, Andrew W. Stephan et al.·Nov 4, 2016SaveLearn
On the Existence of the Kolmogorov Inertial Range in the Terrestrial Magnetosheath TurbulenceIn the solar wind, power spectral density (PSD) of the magnetic field fluctuations generally follow the so-called Kolmogorov spectrum f-5/3 in the inertial range, where the dynamics is thought to be…S. Y. Huang, L. Z. Hadid, F. Sahraoui et al.·Nov 1, 2016SaveLearn
Cosmic ray acceleration via magnetic reconnection of magnetic islands/flux-ropesThe dynamic processes of magnetic reconnection and turbulence cause magnetic islands/flux-ropes generation. The in-situ observations suggest that the coalescence or/and contraction of magnetic…Anil Raghav, Zubair Shaikh·Oct 30, 2016SaveLearn
Response of the Martian Ionosphere to Solar Activity including SEPs and ICMEs in a two week period starting on 25 February 2015In a two-week period between February and March of 2015, a series of interplanetary coronal mass ejections (ICMEs) and (solar energetic particles) SEPs made contact with Mars. The interactions were…F. Duru, D. A. Gurnett, D. D. Morgan et al.·Oct 26, 2016SaveLearn
Neutron Monitor Yield Function: New Improved computationsA ground-based neutron monitor is a standard tool to measure cosmic ray variability near Earth, and it is crucially important to know its yield function for primary cosmic rays. Although there are…A. L. Mishev, I. G. Usoskin, G. A. Kovaltsov·Oct 25, 2016SaveLearn
Factors Affecting the Geo-effectiveness of Shocks and Sheaths at 1 AUWe identify all fast-mode forward shocks, whose sheath regions resulted in a moderate (56 cases) or intense (38 cases) geomagnetic storm during 18.5 years from January 1997 to June 2015. We study…N. Lugaz, C. J. Farrugia, R. M. Winslow et al.·Oct 25, 2016SaveLearn
Imbalanced magnetohydrodynamic turbulence modified by velocity shear in the solar windWe study incompressible imbalanced magnetohydrodynamic turbulence in the presence of background velocity shears. Using scaling arguments, we show that the turbulent cascade is significantly…Grigol Gogoberidze, Yuriy Voitenko·Oct 22, 2016SaveLearn
Prediction of Geomagnetic Storm Strength from Inner Heliospheric In Situ ObservationsPrediction of the effects of coronal mass ejections (CMEs) on Earth strongly depends on knowledge of the interplanetary magnetic field southward component, Bz. Predicting the strength and duration of…M. Kubicka, C. Möstl, T. Amerstorfer et al.·Oct 21, 2016SaveLearn
On the East-West Longitudinally Asymmetric Distribution of Solar Proton EventsA large data set of 78 solar proton events observed near the Earth's orbit during 1996-2011 is investigated. An East-West longitudinal (azimuthal) asymmetry is found to exist in the distribution…H. -Q. He, W. Wan·Oct 18, 2016SaveLearn
Mission Opportunities for Human Exploration of Nearby Planetary BodiesWe characterize mission profiles for human expeditions to near-Earth asteroids, Venus, and Mars. Near-Earth objects (NEOs) are the closest destinations beyond cis-lunar space and present a compelling…Cyrus Foster, Matthew Daniels·Oct 18, 2016SaveLearn
Origin and Ion Charge State Evolution of Solar Wind Transients during 4 -- 7 August 2011We present study of the complex event consisting of several solar wind transients detected by Advanced Composition Explorer (ACE) on 4 -- 7 August 2011, that caused a geomagnetic storm with…D. Rodkin, F. Goryaev, P. Pagano et al.·Oct 17, 2016SaveLearn
Plasma beta dependence of the ion-scale spectral break of solar wind turbulence: high-resolution 2D hybrid simulationsWe investigate properties of the ion-scale spectral break of solar wind turbulence by means of two-dimensional high-resolution hybrid particle-in-cell simulations. We impose an initial ambient…Luca Franci, Simone Landi, Lorenzo Matteini et al.·Oct 17, 2016SaveLearn
Solar Energetic Particle drifts and the energy dependence of 1 AU charge statesThe event-averaged charge state of heavy ion Solar Energetic Particles (SEPs), measured at 1 AU from the Sun, typically increases with the ions' kinetic energy. The origin of this behaviour has…S. Dalla, M. S. Marsh, M. Battarbee·Oct 17, 2016SaveLearn
Transition to kinetic turbulence at proton scales driven by large-amplitude Kinetic Alfvèn fluctuationsSpace plasmas are dominated by the presence of large-amplitude waves, large-scale inhomogeneities, kinetic effects and turbulence. Beside the homogeneous turbulence, generation of small scale…F. Valentini, C. L. Vasconez, O. Pezzi et al.·Oct 17, 2016SaveLearn
Interaction of CME/ICME with HSS solar wind from coronal holes: case studyIn this paper we look for traces of interaction of CME/ICME with high-speed stream (HSS) of solar wind from coronal hole (CH) for two serial Carrington rotations (CRs) during December 2011 - January…Yu. I. Yermolaev, I. G. Lodkina, Yu. S. Shugay et al.·Oct 12, 2016SaveLearn
Determining pitch-angle diffusion coefficients from test particle simulationsTransport and acceleration of charged particles in turbulent media is a topic of great interest in space physics and interstellar astrophysics. These processes are dominated by the scattering of…A. Ivascenko, S. Lange, F. Spanier et al.·Oct 11, 2016SaveLearn
Propinquity of current and vortex structures: effects on collisionless plasma heatingIntermittency of heating in weakly collisional plasma turbulence is an active subject of research, with significant potential impact on understanding of the solar wind, solar corona and astrophysical…Tulasi N Parashar, William H Matthaeus·Oct 10, 2016SaveLearn
Motion of Satellite under the Effect of Oblateness of Earth and Atmospheric DragThe equations governing motion of the satellite under the effect of oblateness of Earth and atmospheric drag have been simulated, for a fixed initial position and three different initial velocities,…Jaita Sharma, B. S. Ratanpal, U. M. Pirzada et al.·Oct 7, 2016SaveLearn
Misestimation of temperature when applying Maxwellian distributions to space plasmas described by kappa distributionsThis paper presents the misestimation of temperature when observations from a kappa distributed plasma are analyzed as a Maxwellian. One common method to calculate the space plasma parameters is by…Georgios Nicolaou, George Livadiotis·Oct 6, 2016SaveLearn
Total Ionizing Dose and Synergistic Effect of Magnetoresistive Random Access MemoryMagetoresistive Random Access Memory (MRAM) was irradiated by 60Co γ-rays and electron beam. The test of synergistic effect was performed under additional magnetic field when irradiation. We analyzed…Xing-yao Zhang, Qi Guo, Yu-dong Li et al.·Oct 5, 2016SaveLearn
MHD-kinetic transition in imbalanced Alfvénic turbulenceAlfvénic turbulence in space is usually imbalanced: amplitudes of waves propagating parallel and anti-parallel to the mean magnetic field B0 are unequal. It is commonly accepted that the…Yuriy Voitenko, Johan De Keyser·Sep 22, 2016SaveLearn