First Joint Observations of Space Weather Events over MexicoThe Mexican Space Weather Service (SCiESMEX in Spanish) and National Space Weather Laboratory (LANCE in Spanish) were organized in 2014 and in 2016 respectively to provide space weather monitoring…V. De la Luz, J. A González-Esparza, M. A. Sergeeva et al.·Aug 20, 2018SaveLearn
A Predicted Small and Round HeliosphereThe shape of the solar wind bubble within the interstellar medium, the so-called heliosphere, has been explored over six decades. As the Sun moves through the surrounding partially-ionized medium,…Merav Opher, Abraham Loeb, James Drake et al.·Aug 20, 2018SaveLearn
Sporadic Aurora near Geomagnetic Equator: In the Philippines, on 27 October 1856While low latitude auroral displays are normally considered to be a manifestation of magnetic storms of considerable size, Silverman (2003, JGR, 108, A4) reported numerous "sporadic auroras" which…Hisashi Hayakawa, José. M. Vaquero, Yusuke Ebihara·Aug 20, 2018SaveLearn
Vlasov methods in space physics and astrophysicsThis paper reviews Vlasov-based numerical methods used to model plasma in space physics and astrophysics. Plasma consists of collectively behaving charged particles that form the major part of…Minna Palmroth, Urs Ganse, Yann Pfau-Kempf et al.·Aug 17, 2018SaveLearn
Data-driven framework for real-time thermospheric density estimationIn this paper, we demonstrate a new data-driven framework for real-time neutral density estimation via model-data fusion in quasi-physical ionosphere-thermosphere models. The framework has two main…Piyush M. Mehta, Richard Linares·Aug 17, 2018SaveLearn
MARSIS observations of field-aligned irregularities and ducted radio propagation in the Martian ionosphereKnowledge of Mars's ionosphere has been significantly advanced in recent years by observations from Mars Express (MEX) and lately MAVEN. A topic of particular interest are the interactions between…David J. Andrews, Hermann J. Opgenoorth, Thomas B. Leyser et al.·Aug 15, 2018SaveLearn
Planetary wave-like oscillations in the ionosphere retrieved with a longitudinal chain of ionosondes at high northern latitudesThis paper examines the influence of neutral dynamics on the high latitude ionosphere. Using a longitudinal chain of ionosondes at high northern latitudes (52\,-65\,N),…Nora H. Stray, Patrick J. Espy·Aug 15, 2018SaveLearn
How the IMF By Induces a Local By Component During Northward IMF Bz and Characteristic TimescalesWe use the Lyon-Fedder-Mobarry global magnetohydrodynamics model to study the effects of the interplanetary magnetic field (IMF) By component on the coupling between the solar wind and…P. Tenfjord, N. Østgaard, S. Haaland et al.·Aug 15, 2018SaveLearn
How accurately can we measure the reconnection rate EM for the MMS diffusion region event of 2017-07-11?We investigate the accuracy with which the reconnection electric field EM can be determined from in-situ plasma data. We study the magnetotail electron diffusion region observed by NASA's…Kevin J. Genestreti, Takuma Nakamura, Rumi Nakamura et al.·Aug 10, 2018SaveLearn
A nearly continuous observation of the equatorial plasmasphere from the inner radiation belt to near a magnetopause reconnection siteOn 22 October 2015, VAP and MMS obtained near-continuous observations of the full radial extent of the duskside equatorial plasmasphere and plume. The plume is evident in in situ plasma data and an…Kevin J. Genestreti, Stephen A. Fuselier, John C. Foster et al.·Aug 10, 2018SaveLearn
Ion velocity and electron temperature inside and around the diamagnetic cavity of comet 67PA major point of interest in cometary plasma physics has been the diamagnetic cavity, an unmagnetized region in the inner-most part of the coma. Here, we combine Langmuir and Mutual Impedance Probe…Elias Odelstad, Anders I. Eriksson, Fredrik L. Johansson et al.·Aug 10, 2018SaveLearn
Interplanetary Magnetic Field Bx Component Influence on Horizontal and Field-Aligned Currents in the IonosphereStatistical analyses have shown that the sunward component of the interplanetary magnetic field, Bx (Geocentric Solar Magnetospheric), moderately but significantly affects the auroral…K. M. Laundal, J. P. Reistad, C. C. Finlay et al.·Aug 6, 2018SaveLearn
Observations of Asymmetries in Ionospheric Return Flow During Different Levels of Geomagnetic ActivityIt is known that the magnetic field of the Earth's closed magnetosphere can be highly displaced from the quiet-day configuration when interacting with the interplanetary magnetic field (IMF), an…J. P. Reistad, N. Østgaard, K. M. Laundal et al.·Aug 6, 2018SaveLearn
Spacecraft With Interstellar Medium Momentum Exchange Reactions: The potential and limitations of propellantless interstellar travelAll known interstellar transportation methods encounter monumental technological or engineering roadblocks, or even rely on speculative unknown science. In particular light of the recent public…Drew Brisbin·Aug 4, 2018SaveLearn
Electron acceleration at quasi-perpendicular shocks in sub- and supercritical regimes: 2D and 3D simulationsShock accelerated electrons are found in many astrophysical environments, and the mechanisms by which they are accelerated to high energies are still not completely clear. For relatively high Mach…D. Trotta, D. Burgess·Aug 2, 2018SaveLearn
X-ray Emissions in a Multiscale Fluid Model of a Streamer DischargeWe use a three-specie fluid model of electric discharge in air to simulate streamer evolution from the avalanche-to-streamer transition to the collision of opposite-polarity streamers. We estimate…Nikolai G. Lehtinen, Nikolai Østgaard·Aug 2, 2018SaveLearn
Nitric Oxide Response to the April 2010 Electron Precipitation Event: UsingWACCM andWACCM-DWith andWithout Medium-Energy ElectronsEnergetic electrons from the magnetosphere deposit their energy in the atmosphere and lead to production of nitric oxide (NO) in the mesosphere and lower thermosphere. We study the atmospheric NO…Christine Smith-Johnsen, Daniel R. Marsh, Yvan Orsolini et al.·Jul 31, 2018SaveLearn
Nighttime mesospheric ozone enhancements during the 2002 southern hemispheric major stratospheric warmingSudden Stratospheric Warmings (SSW) affect the chemistry and dynamics of the middle atmosphere. Major warmings occur roughly every second winter in the Northern Hemisphere (NH), but has only been…Christine Smith-Johnsen, Yvan Orsolini, Frode Stordal et al.·Jul 31, 2018SaveLearn
Dependence of Kinetic Plasma Turbulence on Plasma betaWe study the effects of plasma eta (ratio of plasma pressure to magnetic pressure) on the evolution of kinetic plasma turbulence using fully kinetic particle-in-cell simulations of decaying…Tulasi N. Parashar, William H. Matthaeus, Michael A Shay·Jul 30, 2018SaveLearn
Delay Monitor Circuit for Sensitive Nodes in SRAM-Based FPGAThis paper presents a novel monitor circuit architecture and experiments performed for detection of extra combinational delays in a high frequency SRAM-Based FPGA on delay sensitive nodes due to…Mostafa Darvishi, Yves Audet, Yves Blaquiere·Jul 30, 2018SaveLearn
A preliminary comparison of Na lidar and meteor radar zonal winds during geomagnetic quiet and disturbed conditionsWe investigate the possibility that sufficiently large electric fields and/or ionization during geomagnetic disturbed conditions may invalidate the assumptions applied in the retrieval of neutral…G. Kishore Kumar, H. Nesse Tyssøy, Bifford P. Williams·Jul 23, 2018SaveLearn
An Empirical Orthogonal Function Reanalysis of the Northern Polar External and Induced Magnetic Field During Solar Cycle 23We apply the method of data-interpolating empirical orthogonal functions (EOFs) to ground-based magnetic vector data from the SuperMAG archive to produce a series of month length reanalyses of the…R. M. Shore, M. P. Freeman, J. W. Gjerloev·Jul 23, 2018SaveLearn
Cluster Hot Flow Anomaly Observations During Solar Cycle MinimumHot flow anomalies (HFAs) are studied using observations of the FGM magnetometer and the CIS plasma detector aboard the four Cluster spacecraft. Previously we studied several specific features of…Gabor Facsko, Mariella Tatrallyay, Geza Erdos et al.·Jul 19, 2018SaveLearn
Study of hot flow anomalies using Cluster multi-spacecraft measurementsHot flow anomalies (HFAs) were first discovered in the early 1980s at the bow shock of the Earth. In the 1990s these features were studied, observed and simulated very intensively and many new…Gabor Facsko, Jean-Gabriel Trotignon, Iannis Dandouras et al.·Jul 19, 2018SaveLearn
A statistical study of hot flow anomalies using Cluster dataHot flow anomalies (HFAs) are studied using observations of the RAPID suprathermal charged particle detector, the FGM magnetometer, and the CIS plasma detector aboard the four Cluster spacecraft.…Gabor Facsko, Karoly Kecskemety, Geza Erdos et al.·Jul 19, 2018SaveLearn