Cavitating Langmuir Turbulence in the Terrestrial AuroraLangmuir cavitons have been artificially produced in the earth's ionosphere, but evidence of naturally-occurring cavitation has been elusive. By measuring and modeling the spectra of…B. Isham, M. T. Rietveld, P. Guio et al.·Jan 18, 2011SaveLearn
Observation of relativistic electron microbursts in conjunction with intense radiation belt whistler-mode wavesWe present multi-satellite observations indicating a strong correlation between large amplitude radiation belt whistler-mode waves and relativistic electron precipitation. On separate occasions…K. Kersten, C. A. Cattell, A. Breneman et al.·Jan 17, 2011SaveLearn
A statistical study of the properties of large amplitude whistler waves and their association with few eV to 30 keV electron distributions observed in the magnetosphere by WindWe present a statistical study of the characteristics of very large amplitude whistler waves inside the terrestrial magnetosphere using waveform capture data from the Wind spacecraft as an addition…L. B. Wilson, C. A. Cattell, P. J. Kellogg et al.·Jan 17, 2011SaveLearn
Magnetohydrodynamic structure of a plasmoid in fast reconnection in low-beta plasmasPlasmoid structures in fast reconnection in low-beta plasmas are investigated by two-dimensional magnetohydrodynamic simulations. A high-resolution shock-capturing code enables us to explore a…Seiji Zenitani, Takahiro Miyoshi·Jan 12, 2011SaveLearn
Trajectoire d'un satellite artificiel en chute autour de la terreThe project consists to determine, mathematically, the trajectory that will take an artificial satellite to fight against the air resistance. During our work, we had to consider that our satellite…Younes Ben-Ghabrit, Ali Lahlou Mimi, Modar Hilmi Zawati·Jan 1, 2011SaveLearn
Impact of Solar Wind Depression on the Dayside Magnetosphere under Northward Interplanetary Magnetic FieldWe present a follow up study of the sensitivity of the Earth's magnetosphere to solar wind activity using a particles-in-cell model [Baraka and Ben Jaffel, 2007], but here during northward IMF.…Suleiman Baraka, Lotfi Ben-Jaffel·Dec 28, 2010SaveLearn
Solar sail propulsion: enabling new capabilities for heliophysicsSolar sails can play a critical role in enabling solar and heliophysics missions. Solar sail technology within NASA is currently at 80% of TRL-6, suitable for an in-flight technology demonstration.…L. Johnson, R. Young, D. Alhorn et al.·Dec 23, 2010SaveLearn
Orbit determination of space objects based on sparse optical dataWhile building up a catalog of Earth orbiting objects, if the available optical observations are sparse, not deliberate follow ups of specific objects, no orbit determination is possible without…A. Milani, G. Tommei, D. Farnocchia et al.·Dec 23, 2010SaveLearn
The Poynting-Robertson Effect on Solar SailsWe consider a special relativistic effect, known as the Poynting-Robertson effect, on various types of trajectories of solar sails. Since this effect occurs at order vϕ/c, where vϕ is the…Roman Ya. Kezerashvili, Justin F. Vazquez-Poritz·Dec 16, 2010SaveLearn
Bimodal Electron Fluxes of Nearly Relativistic Electrons during the Onset of Solar Particle Events: 1. ObservationsWe report for several solar energetic particle events intensity and anisotropy measurements of energetic electrons in the energy range ~ 27 to ~ 500 keV as observed with the Wind and ACE spacecraft…Lingpeng Sun, Yulia Kartavykh, Berndt Klecker et al.·Dec 14, 2010SaveLearn
Linear modes in the partially ionized heliosphere plasmaThe heliosphere is predominantly a partially ionized plasma that consists of electrons, ions and significant neutral atoms. Nonlinear interactions amongst these species take place through direct…M. E. Kellum, Dastgeer Shaikh·Dec 4, 2010SaveLearn
Nuclear and Non-Ionizing Energy-Loss for Coulomb Scattered Particles from Low Energy up to Relativistic Regime in Space Radiation EnvironmentIn the space environment, instruments onboard of spacecrafts can be affected by displacement damage due to radiation. The differential scattering cross section for screened nucleus--nucleus…M. J. Boschini, C. Consolandi, M. Gervasi et al.·Nov 22, 2010SaveLearn
The Measurement of the Hubble Constant H0 in the Solar SystemThis paper discusses the methodology necessary to measure the Hubble constant Ho to a high degree of accuracy based upon Doppler tracking of spacecraft in the solar system. Using this methodology…Allen Joel Anderson·Nov 8, 2010SaveLearn
Ionizing wave via high-power HF accelerationRecent ionospheric modification experiments with the 3.6 MW transmitter at the High Frequency Active Auroral Research Program (HAARP) facility in Alaska led to discovery of artificial ionization…Evgeny Mishin, Todd Pedersen·Nov 5, 2010SaveLearn
How to defuse Earth impact threat announcementsSummary: In the past decade both scientists and laymen have probably heard at least once through the newspapers, TV and Internet that a new asteroid has been discovered with non-zero (sometimes…Germano D'Abramo·Oct 25, 2010SaveLearn
STEREO and Wind observations of a fast ICME flank triggering a prolonged geomagnetic storm on 5-7 April 2010On 5 April 2010 an interplanetary (IP) shock was detected by the Wind spacecraft ahead of Earth, followed by a fast (average speed 650 km/s) IP coronal mass ejection (ICME). During the subsequent…Christian Möstl, Manuela Temmer, Tanja Rollett et al.·Oct 20, 2010SaveLearn
Low-Velocity Impacts on PVDF Targets Using a Light Gas GunOrbital debris is a constraint on the long-term health of any spacecraft and must be consi-dered during mission planning. Varying mechanisms have been proposed to quantify the problem. Accurate…J. A. Carmona, M. Cook, J. Schmoke et al.·Oct 19, 2010SaveLearn
Solar Wind Driving of Magnetospheric ULF Waves: Pulsations Driven by Velocity Shear at the MagnetopauseWe present results from global, three-dimensional magnetohydrodynamic (MHD) simulations of the solar wind/magnetosphere interaction. These MHD simulations are used to study ultra low frequency (ULF)…S. G. Claudepierre, S. R. Elkington, M. Wiltberger·Oct 19, 2010SaveLearn
Solar wind driving of magnetospheric ULF waves: Field line resonances driven by dynamic pressure fluctuationsSeveral observational studies suggest that solar wind dynamic pressure fluctuations can drive magnetospheric ultra-low frequency (ULF) waves on the dayside. To investigate this causal relationship,…S. G. Claudepierre, M. K. Hudson, W. Lotko et al.·Oct 19, 2010SaveLearn
Magnetospheric Cavity Modes Driven by Solar Wind Dynamic Pressure FluctuationsWe present results from Lyon-Fedder-Mobarry (LFM) global, three-dimensional magnetohydrodynamic (MHD) simulations of the solar wind-magnetosphere interaction. We use these simulations to investigate…S. G. Claudepierre, M. Wiltberger, S. R. Elkington et al.·Oct 19, 2010SaveLearn
An Energy Conserving Parallel Hybrid Plasma SolverWe investigate the performance of a hybrid plasma solver on the test problem of an ion beam. The parallel solver is based on cell centered finite differences in space, and a predictor-corrector…M. Holmstrom·Oct 15, 2010SaveLearn
Dynamics of solar wind protons reflected by the MoonSolar system bodies that lack a significant atmosphere and significant internal magnetic fields, such as the Moon and asteroids, have been considered as passive absorbers of the solar wind. However,…M. Holmstrom, M. Wieser, S. Barabash et al.·Oct 11, 2010SaveLearn
A method to establish GPS grid ionospheric correction modelThe ionospheric influence is one of the largest error sources in GPS positioning and navigation after closing the Selective Availability (SA). Therefore, it is available to establish a real time…Shuanggen Jin·Oct 10, 2010SaveLearn
Impacts of Stochastic Modeling on GPS-derived ZTD EstimationsGPS-derived ZTD (Zenith Tropospheric Delay) plays a key role in near real-time weather forecasting, especially in improving the precision of Numerical Weather Prediction (NWP) models. The ZTD is…Shuanggen Jin, J. Wang·Oct 10, 2010SaveLearn
Mapping of the cosmic ray events related to the solar activity for the period 2003-2005The relationship between cosmic ray intensity decreases and solar events is still an open field of space research. In this work a complete study of solar events occurred from January 2003 to December…A. Papaioannou, P. Makrantoni, H. Mavromichalaki·Sep 29, 2010SaveLearn