Spacecraft calorimetry as a test of the dark matter scattering model for flyby anomaliesIn previous papers we have shown that scattering of spacecraft nucleons from dark matter gravitationally bound to the earth gives a possible explanation of the flyby velocity anomalies. In addition…Stephen L. Adler·Oct 8, 2009SaveLearn
Two Types of Dynamic Cool Coronal Structures Observed with STEREO and HINODESolar coronal loops show significant plasma motions during their formation and eruption stages. Dynamic cool coronal structures, on the other hand, are often observed to propagate along coronal…J. Zhang, L. P. Li·Sep 10, 2009SaveLearn
Ionospheric correction of space radar dataRadar is a critical tool for maintaining knowledge of the many ob-jects in low Earth orbit and thus for maintaining confidence that societies around the world are secure against a variety of…Mike Hapgood·Sep 9, 2009SaveLearn
Scientific Understanding and the Risk from Extreme Space WeatherLike all natural hazards, space weather exhibits occasional extreme events over timescales of decades to centuries. Historical events provoked much interest but had little economic impact. However,…Mike Hapgood·Aug 29, 2009SaveLearn
Spectral features of solar wind turbulent plasmaSpectral properties of a fully compressible solar wind Hall Magnetohydrodynamic plasma are investigated by means of time dependent three dimensional Hall MHD simulations. Our simulations, in…Dastgeer Shaikh, G. P. Zank·Aug 19, 2009SaveLearn
Influence of ionospheric perturbations in GPS time and frequency transferThe stability of GPS time and frequency transfer is limited by the fact that GPS signals travel through the ionosphere. In high precision geodetic time transfer (i.e. based on precise modeling of…Sophie Pireaux, Pascale Defraigne, Laurence Wauters et al.·Aug 13, 2009SaveLearn
Turbulent Spectra in the Solar Wind PlasmaObservations of interstellar scintillations at radio wavelengths reveal a Kolmogorov-like scaling of the electron density spectrum with a spectral slope of -5/3 over six decades in wavenumber space.…Dastgeer Shaikh, G. P. Zank·Jul 6, 2009SaveLearn
A Zero-Gravity Instrument to Study Low Velocity Collisions of Fragile Particles at Low TemperaturesWe discuss the design, operation, and performance of a vacuum setup constructed for use in zero (or reduced) gravity conditions to initiate collisions of fragile millimeter-sized particles at low…D. M. Salter, D. Heißelmann, G. Chaparro et al.·Jun 22, 2009SaveLearn
Spacecraft Charging and Hazards to Electronics in SpaceThe interaction of a space system with its orbital environment is a major consideration in the design of any space system, since a variety of hazards are associated with the operation of spacecraft…Tsoline Mikaelian·Jun 21, 2009SaveLearn
Regression modeling method of space weather predictionA regression modeling method of space weather prediction is proposed. It allows forecasting Dst index up to 6 hours ahead with about 90% correlation. It can also be used for constructing…Aleksei Parnowski·Jun 17, 2009SaveLearn
Two recent kHz outer heliospheric radio emissions seen at Voyager 1-What are the interplanetary events that trigger them and where are these events when the radio emissions start?We have examined instigating events at the Sun that may be responsible for two of the most recent outer heliospheric kHz emissions detected by the University of Iowa plasma wave detector on Voyager 1…W. R. Webber, D. S. Intriligator·Jun 15, 2009SaveLearn
Laboratory evidence for the non-detection of excited nascent H2 in dark cloudsThere has always been a great deal of interest in the formation of H2 as well as in the binding energy released upon its formation on the surface of dust grains. The present work aims at collecting…Emanuele Congiu, Elie Matar, Lars E. Kristensen et al.·Jun 3, 2009SaveLearn
Solar forcing of the terrestrial atmosphereThe Sun provides the main energy input to the terrestrial atmosphere, and yet the impact of solar variability on long-term changes remains a controversial issue. Direct radiative forcing is the most…T. Dudok de Wit, J. Watermann·May 12, 2009SaveLearn
Finding the best proxies for the solar UV irradianceSolar UV emission has a profound impact on the upper terrestrial atmosphere. Because of instrumental constraints, however, solar proxies often need to be used as substitutes for the solar spectral…T. Dudok de Wit, M. Kretzschmar, J. Lilensten et al.·May 12, 2009SaveLearn
Magnetohydrodynamic simulation of the interaction between two interplanetary magnetic clouds and its consequent geoeffectivenessNumerical studies of the interplanetary "multiple magnetic clouds (Multi-MC)" are performed by a 2.5-dimensional ideal magnetohydrodynamic (MHD) model in the heliospheric meridional plane.…Ming Xiong, Huinan Zheng, S. T. Wu et al.·Apr 5, 2009SaveLearn
Self-Organization in a Driven Dissipative Plasma SystemWe perform a fully self-consistent 3-D numerical simulation for a compressible, dissipative magneto-plasma driven by large-scale perturbations, that contain a fairly broader spectrum of…Dastgeer Shaikh, B. Dasgupta, Q. Hu et al.·Mar 25, 2009SaveLearn
Nonlinear Development of Streaming Instabilities In Strongly Magnetized PlasmasThe nonlinear development of streaming instabilities in the current layers formed during magnetic reconnection with a guide field is explored. Theory and 3-D particle-in-cell simulations reveal two…H. Che, J. F. Drake, M. Swisdak et al.·Mar 7, 2009SaveLearn
Spectral Properties of Electromagnetic Turbulence in PlasmasWe report on the nonlinear turbulent processes associated with electromagnetic waves in plasmas. We focus on low-frequency (in comparison with the electron gyrofrequency) nonlinearly interacting…Dastgeer Shaikh, P K Shukla·Mar 5, 2009SaveLearn
Magnetic guide field generation in thin collisionless current sheetsIn thin (Δ< few λi) collisionless current sheets in a space plasma like the magnetospheric tail or magnetopause current layer, magnetic fields can grow from thermal fluctuation level by the…R. A. Treumann, R. Nakamura, W. Baumjohann·Mar 2, 2009SaveLearn
Study of the Pioneer Anomaly: A scientific detective storyNASA's first two deep space missions, Pioneers 10 and 11, have been travelling through the outer solar system for three decades. A slight deviation from their calculated trajectories presents an…Viktor T. Toth·Feb 28, 2009SaveLearn
Whistler Wave Cascade in Solar Wind PlasmaNonlinear three dimensional, time dependent, fluid simulations of whistler wave turbulence are performed to investigate role of whistler waves in solar wind plasma turbulence in which characteristic…Dastgeer Shaikh·Feb 25, 2009SaveLearn
Solar-Terrestrial Simulation in the STEREO Era: The January 24-25, 2007 EruptionsThe SECCHI instruments aboard the recently launched STEREO spacecraft enable for the first time the continuous tracking of coronal mass ejections (CMEs) from the Sun to 1 AU. We analyze line-of-sight…N. Lugaz, A. Vourlidas, I. I. Roussev et al.·Feb 11, 2009SaveLearn
On the linear mirror mode threshold in high-β space plasmaThe linear threshold condition of the mirror mode including weak drift and finite Larmor radius effects is analysed and shown that it can be given to arbitrary precision in closed analytical form.…R. A. Treumann, O. D. Constantinescu·Feb 10, 2009SaveLearn
The dynamic mature of the Adams ring arcs - Fraternite, Egalite (2,1), Liberte, CourageBy considering the finite mass of Fraternite, the dynamic nature of the Adams ring arcs is regarded as caused by the reaction of a test body (a minor arc) through the Lindblad resonance (LR).…K. H. Tsui·Feb 2, 2009SaveLearn
Resistive scales for collisionless reconnection in space plasmaWe derive restrictions on collisional reconnection under the conditions in near-Earth space. The arguments are based on the precise definition and estimates of the resistive scale Lη at the ion…R. A. Treumann·Feb 1, 2009SaveLearn