Joint analysis of two-way laser range and one-way frequency measurements for the gravitational redshift experiment with the RadioAstron spacecraftWe consider the problem of joint analysis of two-way laser range and one-way frequency measurements in high-precision tests of general relativity with spacecrafts. Of main interest to such tests is…M. V. Zakhvatkin, D. A. Litvinov·Dec 4, 2018SaveLearn
On the Spatial Coherence of Magnetic Ejecta: Measurements of Coronal Mass Ejections by Multiple Spacecraft Longitudinally Separated by 0.01 AUMeasurements of coronal mass ejections (CMEs) by multiple spacecraft at small radial separations but larger longitudinal separations is one of the ways to learn about the three-dimensional structure…N. Lugaz, C. J. Farrugia, R. M. Winslow et al.·Dec 3, 2018SaveLearn
On the generation of probabilistic forecasts from deterministic modelsMost of the methods that produce space weather forecasts are based on deterministic models. In order to generate a probabilistic forecast, a model needs to be run several times sampling the input…Enrico Camporeale, Xiangning Chu, Oleksiy Agapitov et al.·Nov 30, 2018SaveLearn
The Magnetic Field Geometry of Small Solar Wind Flux Ropes Inferred from their Twist DistributionThis work extends recent efforts on the force-free modeling of large flux rope-type structures (magnetic clouds, MCs) to much smaller spatial scales. We first select small flux ropes (SFRs) by eye…W. Yu, C. J. Farrugia, N. Lugaz et al.·Nov 26, 2018SaveLearn
On the applicability of Taylor's hypothesis in streaming magnetohydrodynamic turbulenceWe examine the range of applicability of Taylor's hypothesis used in observations of magnetic turbulence in the solar wind. We do not refer to turbulence theory. We simply ask whether in a turbulent…R. A. Treumann, W. Baumjohann, Yasuhito Narita·Nov 25, 2018SaveLearn
On the ion-inertial range density power spectra in solar wind turbulenceA model-independent first-principle first-order investigation of the shape of turbulent density-power spectra in the ion-inertial range of the solar wind at 1 AU is presented. De-magnetised ions in…R. A. Treumann, W. Baumjohann, Yasuhito Narita·Nov 25, 2018SaveLearn
A homogeneous aa index: 2. hemispheric asymmetries and the equinoctial variationPaper 1 [Lockwood et al., 2018] generated annual means of a new version of the aa geomagnetic activity index which includes corrections for secular drift in the geographic coordinates of the…Mike Lockwood, Ivan D. Finch, Aude Chambodut et al.·Nov 24, 2018SaveLearn
Evaluation of plasma properties from chorus waves observed at the generation regionIn this study we present an inversion method which provides thermal plasma population parameters from characteristics of chorus emissions only. Our ultimate goal is to apply this method to ground…Lilla Juhász, Yoshiharu Omura, János Lichtenberger et al.·Nov 23, 2018SaveLearn
Study of Exospheric Neutral Composition of Mars observed from Indian Mars Orbiter MissionThe raw exospheric composition data of Mars for the period September 2014 to October 2015 has been retrieved and analysed using the observations carried out by Mars Exospheric Neutral Composition…Kamsali Nagaraja, Praveen Kumar Basuvaraj, S. C. Chakravarty et al.·Nov 19, 2018SaveLearn
Modeling of Heliospheric Modulation of Cosmic-ray Positrons in a Very Quiet HeliosphereHeliospheric modulation conditions were unusually quite during the last solar minimum activity between Solar Cycles 23/24. Fortunately, the PAMELA space-experiment measured six-month averaged…O. P. M. Aslam, D. Bisschoff, M. S. Potgieter et al.·Nov 16, 2018SaveLearn
Photometric Study of the C/2014 Q2 (Lovejoy) Comet Plasma TailsObservations of C/2014 Q2 (Lovejoy) comet were carried out on 7th February, 2015, at the observation station in Mayaki village (No. 583 -- Odesa-Mayaki observatory). The integrated-light photometry…Valery V. Kleschonok, Igor V. Luk'yanyk, Yury M. Gorbanev et al.·Nov 16, 2018SaveLearn
A Detailed Model of the Irish High Voltage Power Network for Simulating GICsConstructing a power network model for geomagnetically induced current (GIC) calculations requires information on the DC resistances of elements within a network. This information is often not known,…Seán P. Blake, Peter T. Gallagher, Joan Campanyà et al.·Nov 9, 2018SaveLearn
First results from sonification and exploratory citizen science of magnetospheric ULF waves: Long-lasting decreasing-frequency poloidal field line resonances following geomagnetic stormsMagnetospheric ultra-low frequency (ULF) waves contribute to space weather in the solar wind - magnetosphere - ionosphere system. The monitoring of these waves by space- and ground-based instruments,…M. O. Archer, M. D. Hartinger, R. Redmon et al.·Nov 7, 2018SaveLearn
Low-Latitude Aurorae during the Extreme Space Weather Events in 1859The Carrington storm (September 1/2, 1859) is one of the largest magnetic storms ever observed and it has caused global auroral displays in low-latitude areas, together with a series of multiple…Hisashi Hayakawa, Yusuke Ebihara, David P. Hand et al.·Nov 7, 2018SaveLearn
Multiple satellite analysis of the Earth's thermosphere and interplanetary magnetic field variations due to ICME/CIR events during 2003-2015We present a refined statistical analysis based on interplanetary coronal mass ejections as well as co-rotating interaction regions for the time period 2003-2015 to estimate the impact of different…Sandro Krauss, Manuela Temmer, Susanne Vennerstroem·Nov 6, 2018SaveLearn
Machine Learning Approach for Solar Wind CategorizationSolar wind classification is conducive to understand the physical processes ongoing at the Sun and solar wind evolution in the interplanetary space, and furthermore, it is helpful for early warning…Hui Li, Chi Wang, Cui Tu et al.·Nov 6, 2018SaveLearn
Electron Strahl and Halo Formation in the Solar WindWe propose a kinetic model describing the formation of the strahl and halo electron populations in the solar wind. We demonstrate that the suprathermal electrons propagating from the sun along the…Konstantinos Horaites, Stanislav Boldyrev, Mikhail V. Medvedev·Nov 2, 2018SaveLearn
Properties of turbulence in the reconnection exhaust: numerical simulations compared with observationsThe properties of the turbulence which develops in the outflows of magnetic reconnection have been investigated using self-consistent plasma simulations, in three dimensions. As commonly observed in…F. Pucci, S. Servidio, L. Sorriso-Valvo et al.·Oct 31, 2018SaveLearn
Fitting the Galactic Electron Spectrum Measured by Voyager at Low Energies and also by CALET/AMS-2 at High Energies Using a Monte Carlo Diffusion Model for Electron Propagation - One Spectrum Fits AllIn this paper we compare galactic electron spectra measured up to TeV energies by AMS2 and CALET and that measured by Voyager at the lowest energies down to 1 MeV with that calculated using a Monte…W. R. Webber, J. Quenby, T. Harrison et al.·Oct 25, 2018SaveLearn
First analysis of GLE 72 event on 10 September 2017: Spectral and anisotropy characteristicsUsing neutron monitor and space-borne data we performed an analysis of the second ground level enhancement of solar cycle 24, namely the event of 10 September 2017 (GLE 72) and derive the spectral…A. L. Mishev, I. G. Usoskin, O. Raukunen et al.·Oct 24, 2018SaveLearn
Measurements in Interstellar Space of Galactic Cosmic Ray Isotopes of Li, Be, B and N, Ne Nuclei Between 40-160 MeV/nuc by the CRS Instrument on Voyager 1In this paper we report a study of the isotopic composition of Li, Be, B and N, Ne nuclei from a 5 year time period beyond the heliopause using the CRS instruments on Voyager. By comparing the…W. R. Webber, N. Lal, B. Heikkila·Oct 19, 2018SaveLearn
Seasonal, Solar Zenith Angle, and Solar Flux Variations of O+ in the Topside Ionosphere of MarsUsing observations from MAVEN's Neutral Gas and Ion Mass Spectrometer (NGIMS), we characterize the seasonal, solar zenith angle (SZA), and solar flux dependent variations of the O+ peak and the…Zachary Girazian, Paul Mahaffy, Yuni Lee et al.·Oct 18, 2018SaveLearn
Forecasting the Arrival Time of Coronal Mass Ejections: Analysis of the CCMC CME ScoreboardAccurate forecasting of the properties of coronal mass ejections as they approach Earth is now recognized as an important strategic objective for both NOAA and NASA. The time of arrival of such…Pete Riley, Leila Mays, Jesse Andries et al.·Oct 16, 2018SaveLearn
The Rigidity Dependence of the Diffusion Coefficient in the Heliosheath and an Explanation of the Extreme Solar Modulation Effects for Cosmic Ray Electrons from 3-60 MeV Observed at Voyager 1We believe that the extreme solar modulation of 3-60 MeV Galactic electrons measured by Voyager in the heliosheath and the interpretation of this new data in terms of the rigidity dependence of the…William R. Webber, Thomas E. Harrison, Nand Lal et al.·Oct 16, 2018SaveLearn
Torsional Alfven wave embedded ICME magnetic cloud and corresponding geomagnetic stormThe energy transfer during the interaction of large-scale solar wind structure and the Earth's magnetosphere is the chronic issue in space-weather studies. To understand this, researchers widely…Anil N. Raghav, Ankita Kule, Ankush Bhaskar et al.·Oct 14, 2018SaveLearn