A global study of hot flow anomalies using Cluster multi-spacecraft measurementsHot flow anomalies (HFAs) are studied using observations of the magnetometer and the plasma instrument aboard the four Cluster spacecraft. We study several specific features of tangential…Gabor Facsko, Zoltan Nemeth, Geza Erdos et al.·Jul 19, 2018SaveLearn
Solar Wind Turbulence Studies using MMS Fast Plasma Investigation DataStudies of solar wind turbulence traditionally employ high-resolution magnetic field data, but high-resolution measurements of ion and electron moments have been possible only recently. We report the…Riddhi Bandyopadhyay, A. Chasapis, R. Chhiber et al.·Jul 16, 2018SaveLearn
Data-constrained Model for Coronal Mass Ejections Using Graduated Cylindrical Shell MethodCoronal Mass Ejections (CMEs) are major drivers of extreme space weather conditions, this being a matter of serious concern for our modern technologically-dependent society. Development of numerical…Talwinder Singh, Mehmet Sarp Yalim, Nikolai V Pogorelov·Jul 14, 2018SaveLearn
In Situ Observations of Preferential Pickup Ion Heating at an Interplanetary ShockNon-thermal pickup ions (PUIs) are created in the solar wind (SW) by charge-exchange between SW ions (SWIs) and slow interstellar neutral atoms. It has long been theorized, but not directly observed,…E. J. Zirnstein, D. J. McComas, R. Kumar et al.·Jul 13, 2018SaveLearn
Large-scale Control of Kinetic Dissipation in the Solar WindIn this Letter we study the connection between the large-scale dynamics of the turbulence cascade and particle heating on kinetic scales. We find that the inertial range turbulence amplitude ($δ…Daniel Vech, Kristopher G. Klein, Justin C. Kasper·Jul 12, 2018SaveLearn
The Great Space Weather Event during February 1872 Recorded in East AsiaThe study of historical great geomagnetic storms is crucial for assessing the possible risks to the technological infrastructure of a modern society, caused by extreme space-weather events. The…Hisashi Hayakawa, Yusuke Ebihara, David M. Willis et al.·Jul 12, 2018SaveLearn
Dynamics of large-scale solar-wind streams obtained by the double superposed epoch analysis. 4. Helium abundanceThis work is a continuation of our previous articles (Yermolaev et al. in J. Geophys. Res. 120, 7094, 2015; Yermolaev et al. in Solar Phys. 292, 193, 2017; Yermolaev et al. in Solar Phys. 293, 91,…Yu. I. Yermolaev, I. G. Lodkina, M. Yu. Yermolaev et al.·Jul 10, 2018SaveLearn
Nitric Oxide in Climatological Global Energy Budget During 1982-2013Over the past decades, temperature and density of the upper atmosphere show negative trends and decrease of the upper atmospheric temperature is attributed to the declining neutral density.…Cissi Y. Lin, Yue Deng·Jul 6, 2018SaveLearn
VLF transmitters as tools for monitoring the plasmasphereContinuous burst mode VLF measurements were recorded on the RBSP/Van Allen Probes satellites and are analyzed to detect pulses from the Russian Alpha (RSDN-20) ground-based navigational system. Based…David Koronczay, Janos Lichtenberger, Lilla Juhasz et al.·Jul 4, 2018SaveLearn
Comparison of the Thermospheric Nitric Oxide Emission Observations and the Global Ionosphere-Thermosphere Model (GITM) Simulations: Sensitivity to Solar and Geomagnetic ActivitiesAn accurate estimate of the energy budget (heating and cooling) of the ionosphere and thermosphere, especially during space weather events, has been a challenge. The abundance of Nitric Oxide (NO), a…Cissi Y. Lin, Yue Deng, Karthik Venkataramani et al.·Jul 3, 2018SaveLearn
Cosmic Ray Electrons and Protons ~1 MeV - A 40 Year Study of Their Intensities from the Earth to the Heliopause and Beyond Into Local Interstellar Space by the CRS Experiment on Voyager 1Studies on Voyager 1 using the CRS instrument have shown the presence of sub-MeV electrons in the interstellar medium beyond the heliopause. We believe that these electrons are the very low energy…W. R. Webber, N. Lal, B. Heikkila·Jul 2, 2018SaveLearn
Cosmic ray short burst observed with the Global Muon Detector Network (GMDN) on June 22, 2015We analyze the short cosmic ray intensity increase ("cosmic ray burst": CRB) on June 22, 2015 utilizing a global network of muon detectors and derive the global anisotropy of cosmic ray intensity and…K. Munakata, M. Kozai, P. Evenson et al.·Jun 27, 2018SaveLearn
The importance of ensemble techniques for operational space weather forecastingThe space weather community has begun to use frontier methods such as data assimilation, machine learning, and ensemble modeling to advance current operational forecasting efforts. This was…Sophie A. Murray·Jun 26, 2018SaveLearn
Evolution of the solar wind speed with heliocentric distance and solar cycle. Surprises from Ulysses and unexpectedness from observations of the solar coronaAn extensive analysis of Ulysses observations of the solar wind speed V from 1990 to 2008 is undertaken. It is shown that the evolution of V with heliocentric distance r depends substantially on both…O. V. Khabarova, V. N. Obridko, R. A. Kislov et al.·Jun 25, 2018SaveLearn
On the Persistent Shape and Coherence of Pulsating Auroral PatchesThe pulsating aurora covers a broad range of fluctuating shapes that are poorly characterized. The purpose of this paper is therefore to provide objective and quantitative measures of the extent to…B. K. Humberset, J. W. Gjerloev, I. R. Mann et al.·Jun 25, 2018SaveLearn
MMS Observations of Beta-Dependent Constraints on Ion Temperature-Anisotropy in Earth's MagnetosheathProtons (ionized hydrogen) in the solar wind frequently exhibit distinct temperatures (T p and T p) perpendicular and parallel to the plasma's background magnetic-field.…Bennett A. Maruca, A. Chasapis, S. P. Gary et al.·Jun 23, 2018SaveLearn
Two-dimensional hybrid simulations of filamentary structures and kinetic slow waves downstream of a quasi-parallel shockIn this paper, with two-dimensional (2-D) hybrid simulations, we study the generation mechanism of filamentary structures downstream of a quasi-parallel shock. The results show that in the downstream…Yufei Hao, Quanming Lu, Xinliang Gao et al.·Jun 20, 2018SaveLearn
Experimental Simulation of Dust Impacts at Starflight VelocitiesThe problem of simulating the interaction of spacecraft travelling at velocities necessary for starflight with the interplanetary and interstellar medium is considered. Interaction of protons, atoms,…Andrew Higgins·Jun 19, 2018SaveLearn
A variational approach to Data Assimilation in the Solar WindVariational Data Assimilation (DA) has enabled huge improvements in the skill of operational weather forecasting. In this study, we use a simple solar-wind propagation model to develop the first…Matthew Lang, Mathew Owens·Jun 19, 2018SaveLearn
Toward Quantitative Model for Simulation and Forecast of Solar Energetic Particles Production during Gradual Events - I: Magnetohydrodynamic Background Coupled to the SEP ModelSolar Energetic Particles (SEPs) are an important aspect of space weather. SEP events posses a high destructive potential, since they may cause disruptions of communication systems on Earth and be…D. Borovikov, I. V. Sokolov, I. Roussev et al.·Jun 19, 2018SaveLearn
Incompressive Energy Transfer in the Earth's Magnetosheath: Magnetospheric Multiscale ObservationsUsing observational data from the Magnetospheric Multiscale (MMS) Mission in the Earth's magnetosheath, we estimate the energy cascade rate using different techniques within the framework of…Riddhi Bandyopadhyay, A. Chasapis, R. Chhiber et al.·Jun 12, 2018SaveLearn
Strong Proton-Defect Interaction in Synergistic Irradiation Damage SystemWe experimentally investigated total ionizing dose (TID) response of the input-stage PNP transitor in an operational amplifier LM324N with various initial displacement damage (IDD). We found that,…Ying Zhang, Yang Liu, Jie Zhao et al.·Jun 11, 2018SaveLearn
A Comparison of the Galactic Cosmic Ray Electron and Proton Intensities From 1 MeV/nuc to 1 TeV/nuc Using Voyager and Higher Energy Magnetic Spectrometer Measurements Are There Differences in the Source Spectra of These Particles?Using Leaky Box Model propagation calculations for H nuclei and a Monte Carlo diffusion propagation model for electrons, starting from specific source spectra, we have matched the observed LIS…W. R. Webber, T. L. Villa·Jun 7, 2018SaveLearn
Differential Drag Control Scheme for Large Constellation of Planet Satellites and On-Orbit ResultsA methodology is presented for the differential drag control of a large fleet of propulsion-less satellites deployed in the same orbit. The controller places satellites into a constellation with…Cyrus Foster, James Mason, Vivek Vittaldev et al.·Jun 4, 2018SaveLearn
Some characteristics of the GLE on 10 September 2017We present a short overview of the event associated with the recent strong solar flare on 10 September 2017 (X 8.2) based on the available data both from satellite GOES-13 and from selected neutron…Viktoria Kurt, Anatoli Belov, Karel Kudela et al.·Jun 1, 2018SaveLearn