Using High Frequency Propagation to Calculate Basic Maximum Usable FrequencyA comparison between observed (obs.) digital ionospheric sounding data and predicted (pre.) using International Reference Ionosphere (IRI) model for critical frequency (foF2) and Basic Maximum Usable…Israa Abdualqassim Mohammed Ali·Aug 5, 2019SaveLearn
Reflection-driven MHD turbulence in the solar atmosphere and solar windWe present 3D numerical simulations and an analytic model of reflection-driven MHD turbulence in the solar wind. Our simulations describe transverse, non-compressive MHD fluctuations within a narrow…Benjamin D. G. Chandran, Jean C. Perez·Aug 2, 2019SaveLearn
Acceleration of Energetic Ions in Corotating Interaction Region near 1.5 au: Evidence from MAVENThe dearth of observations between 1 au and 3 au limits our understanding of energetic particle acceleration processes in interplanetary space. We present the first-of-their-kind observations of the…Smitha V. Thampi, C. Krishnaprasad, P. R. Shreedevi et al.·Aug 2, 2019SaveLearn
On the Response of Martian Ionosphere to the Passage of a Corotating Interaction Region: MAVEN ObservationsThe response of Martian ionosphere to the passage of Corotating Interaction Region (CIR) of June 2015 is studied using observations from several instruments aboard the Mars Atmosphere and Volatile…C. Krishnaprasad, Smitha V. Thampi, Anil Bhardwaj·Aug 2, 2019SaveLearn
Spreading protons in the heliosphere: a note on cross-field diffusion effectsWe study how a high-speed solar wind stream embedded in a slow solar wind affects the transport and energy changes of solar energetic protons in interplanetary space, assuming different levels of…Nicolas Wijsen, Angels Aran, Jens Pomoell et al.·Aug 2, 2019SaveLearn
Deriving the solar activity cycle modulation on cosmic ray intensity observed by Nagoya muon detector from October 1970 until December 2012It is well known that the cosmic ray intensity observed at the Earth's surface presents an 11 and 22-yr variations associated with the solar activity cycle. However, the observation and analysis of…Rafael R. S. de Mendonça, Carlos R. Braga, Ezequiel Echer et al.·Aug 1, 2019SaveLearn
Sign singularity of the local energy transfer in space plasma turbulenceIn weakly collisional space plasmas, the turbulent cascade provides most of the energy that is dissipated at small scales by various kinetic processes. Understanding the characteristics of such…Luca Sorriso-Valvo, Gaetano De Vita, Federico Fraternale et al.·Jul 25, 2019SaveLearn
Enhanced Kinetic Impactor for Deflecting Large Potentially Hazardous Asteroids via Maneuvering Space RocksAsteroid impacts pose a major threat to all life on Earth. The age of the dinosaurs was abruptly ended by a 10-km-diameter asteroid. Currently, a nuclear device is the only means of deflecting large…Mingtao Li, Yirui Wang, Youliang Wang et al.·Jul 24, 2019SaveLearn
Mapping Magnetic Field Lines for an Accelerating Solar WindMapping of magnetic field lines is important for studies of the solar wind and the sources and propagation of energetic particles between the Sun and observers. A recently developed mapping approach…S. Tasnim, Iver H. Cairns, B. Li et al.·Jul 19, 2019SaveLearn
New ion energy-mass spectrometer ULTIMAN (UlTImate Mass ANalyzer) for space plasmasMeasurements of Ion velocity distributions are one of basic goals of space plasma studies. There is variety of ion and electron spectrometers (e.g. Wuest et al, 2007, Young et al., 2007, Zurbuchen…Oleg Vaisberg, Sergey Shuvalov·Jul 18, 2019SaveLearn
Atmospheric Electricity at the Ice GiantsLightning was detected by Voyager 2 at Uranus and Neptune, and weaker electrical processes also occur throughout planetary atmospheres from galactic cosmic ray (GCR) ionisation. Lightning is an…K. L. Aplin, G. Fischer, T. A. Nordheim et al.·Jul 16, 2019SaveLearn
In-situ observation of Hall Magnetohydrodynamic Cascade in Space PlasmaWe present estimates of the turbulent energy cascade rate, derived from a Hall-MHD third-order law. We compute the contribution from the Hall term and the MHD term to the energy flux. We use MMS data…Riddhi Bandyopadhyay, Luca Sorriso-Valvo, Alexandros Chasapis et al.·Jul 16, 2019SaveLearn
Simulating the interaction of a non-magnetized planet with the stellar wind produced by a sun-like star using the FLASH CodeThe study of the interaction between solid objects and magnetohydrodynamic (MHD) fluids is of great importance in physics as consequence of the significant phenomena generated, such as planets…Edgard de Freitas Diniz Evangelista, Oswaldo Duarte Miranda, Odim Mendes et al.·Jul 11, 2019SaveLearn
Spectral signatures of recursive magnetic field reconnectionWe use 2.5D Magnetohydrodynamic simulations to investigate the spectral signatures of the nonlinear disruption of a tearing unstable current sheet via the generation of multiple secondary current…Anna Tenerani, Marco Velli·Jul 11, 2019SaveLearn
Nonlinear evolution of the whistler heat flux instabilityWe use the one-dimensional TRISTAN-MP particle-in-cell code to model the nonlinear evolution of the whistler heat flux instability that was proposed by Gary et al. (1999, 2000) to regulate the…Ilya V. Kuzichev, Ivan Y. Vasko, Angel Rualdo Soto-Chavez et al.·Jul 10, 2019SaveLearn
Plasma pressures in the heliosheath from Cassini ENA and Voyager 2 measurements: Validation by the Voyager 2 heliopause crossingWe report "ground truth", 28-3500 keV in-situ ion and 5.2-55 keV remotely sensed ENA measurements from Voyager 2/Low Energy Charged Particle (LECP) detector and Cassini/Ion and Neutral Camera (INCA),…K. Dialynas, S. M. Krimigis, R. B. Decker et al.·Jul 8, 2019SaveLearn
Single-spacecraft identification of flux tubes and current sheets in the Solar Wind: combined PVI and Grad-Shafronov methodA novel technique is presented for describing and visualizing the local topology of the magnetic field using single-spacecraft data in the solar wind. The approach merges two established techniques:…Francesco Pecora, Antonella Greco, Qiang Hu et al.·Jul 5, 2019SaveLearn
Helical distributed chaos in magnetic field of solar windHelical distributed chaos in magnetic field has been studied using results of direct numerical simulations (dominated by magnetic helicity), of a laboratory experiment with plasma wind tunnel and of…A. Bershadskii·Jul 4, 2019SaveLearn
The origin of slow Alfv\'enic solar wind at solar minimumAlthough the origins of slow solar wind are unclear, there is increasing evidence that at least some of it is released in a steady state on over-expanded coronal hole magnetic field lines. This type…D. Stansby, L. Matteini, T. S. Horbury et al.·Jul 3, 2019SaveLearn
Three-Dimensional X-line Spreading in Asymmetric Magnetic ReconnectionThe spreading of the X-line out of the reconnection plane under a strong guide field is investigated using large-scale three-dimensional (3D) particle-in-cell (PIC) simulations in asymmetric magnetic…Tak Chu Li, Yi-Hsin Liu, Michael Hesse et al.·Jul 3, 2019SaveLearn
Statistical Analysis of the Correlation between Anomalies in the Czech Electric Power Grid and Geomagnetic ActivityEruptive events on the Sun have an impact on the immediate surroundings of the Earth. Through induction of electric currents, they also affect Earth-bound structures such as the electric power…Tatiana Vybostokova, Michal Svanda·Jul 3, 2019SaveLearn
Enhanced low-flux sensitivity (ELFS) effect of neutron-induced displacement damage in bipolar devices: physical mechanism and parametric modelSimilar to the enhanced low-dose-rate sensitivity (ELDRS) effect of ionization damage, an enhanced low-flux senstivity (ELFS) effect has been reported in ions/neutron irradiation on n-type silicon or…Yang Liu, Ying Zhang, Mu Lan et al.·Jul 2, 2019SaveLearn
Coverage Area Determination for Conical Fields of View Considering an Oblate EarthThis paper introduces a new analytical method for the determination of the coverage area modeling the Earth as an oblate ellipsoid of rotation. Starting from the knowledge of the satellite's position…Marco Nugnes, Camilla Colombo, Massimo Tipaldi·Jun 28, 2019SaveLearn
Helium Variation Across Two Solar Cycles Reveals A Speed-Dependent Phase LagWe study the relationship between solar wind helium to hydrogen abundance ratio (AHe), solar wind speed (vSW), and sunspot number (SSN) over solar cycles 23 and 24. This is…B. L. Alterman, Justin C. Kasper·Jun 28, 2019SaveLearn
The low-frequency break observed in the slow solar wind magnetic spectraFluctuations of solar wind magnetic field and plasma parameters exhibit a typical turbulence power spectrum with a spectral index ranging between -5/3 and -3/2. In particular, at 1…R. Bruno, D. Telloni, L. Sorriso-Valvo et al.·Jun 27, 2019SaveLearn