Results 1 to 10 of about 36,673 (286)

Rapid Acceleration Bursts in the Van Allen Radiation Belt [PDF]

Journal of Geophysical Research: Space Physics
AbstractThe fast Van Allen radiation belt electron dynamics during geomagnetic storms have not yet been fully explained, in part due to limitations of standard satellite missions in both orbit and the number of spacecraft. Here we overcome these limitations using measurements from the Global Positioning System (GPS) constellation during an acceleration
L. Olifer, S. K. Morley, L. G. Ozeke, I. R. Mann, M. M. H. Kalliokoski, M. G. Henderson, M. R. Carver, A. Hoover   +7 more
semanticscholar   +3 more sources

A Statistical Survey of Radiation Belt Dropouts Observed by Van Allen Probes [PDF]

Geophysical Research Letters, 2018
A statistical analysis on the radiation belt dropouts is performed based on 4 years of electron phase space density data from the Van Allen Probes.
Zheng Xiang, Weichao Tu, Binbin Ni, M. G. Henderson, Xing Cao   +4 more
doaj   +3 more sources

A statistical analysis of the Kappa-type energy spectrum distribution of radiation belt electrons observed by Van Allen Probes [PDF]

Earth and Planetary Physics, 2023
The energy spectrum of energetic electrons is a key factor representing the dynamic variations of Earth’s Van Allen radiation belts. Increased measurements have indicated that the commonly used Maxwellian and Kappa distributions are inadequate for ...
LuHuai Jiao, Xin Ma, YuanNong Zhang, TaiFeng Jin, Song Fu, BinBin Ni   +5 more
doaj   +2 more sources

Wave-induced loss of ultra-relativistic electrons in the Van Allen radiation belts [PDF]

Nature Communications, 2016
AbstractThe dipole configuration of the Earth’s magnetic field allows for the trapping of highly energetic particles, which form the radiation belts. Although significant advances have been made in understanding the acceleration mechanisms in the radiation belts, the loss processes remain poorly understood.
Yuri Y. Shprits, Alexander Y. Drozdov, Maria Spasojevic, Adam C. Kellerman, Maria E. Usanova, Mark J. Engebretson, Oleksiy V. Agapitov, Irina S. Zhelavskaya, Tero J. Raita, Harlan E. Spence, Daniel N. Baker, Hui Zhu, Nikita A. Aseev   +12 more
core   +11 more sources

Intense chorus waves are the cause of flux-limiting in the heart of the outer radiation belt [PDF]

Scientific Reports, 2022
Chorus waves play a key role in outer Van Allen electron belt dynamics through cyclotron resonance. Here, we use Van Allen Probes data to reveal a new and distinct population of intense chorus waves excited in the heart of the radiation belt during the ...
S. Chakraborty, I. R. Mann, C. E. J. Watt, I. J. Rae, L. Olifer, L. G. Ozeke, J. K. Sandhu, B. H. Mauk, H. Spence   +8 more
doaj   +2 more sources

Van Allen Radiation Belts: An Important Challenge for Astrobiology Missions [PDF]

فناوری در مهندسی هوافضا, 2020
Manned space missions account for a large proportion of future space travel missions.Van Allen radiation belts are major challenges of space missions with an astrobiology approach.
Iman Shafieenejad, Sharareh Ghasemi, nadia noori   +2 more
doaj   +1 more source

Wave–particle interaction effects in the Van Allen belts [PDF]

Earth, Planets and Space, 2021
Discovering such structures as the third radiation belt (or “storage ring”) has been a major observational achievement of the NASA Radiation Belt Storm Probes program (renamed the “Van Allen Probes” mission in November 2012).
Daniel N. Baker
doaj   +2 more sources

Impact of the South Atlantic Anomaly on radiation exposure at flight altitudes during solar minimum [PDF]

Scientific Reports, 2023
The South Atlantic Anomaly (SAA) is a geographical region over the South Atlantic Ocean where the inner Van Allen radiation belt extends down particularly close to Earth.
Matthias M. Meier, Thomas Berger, Thomas Jahn, Daniel Matthiä, Mona C. Plettenberg, Markus Scheibinger, Kai Schennetten, Michael Wirtz   +7 more
doaj   +2 more sources

VAMPIRE: Using a Random Forest to Forecast Earth's Outer Van Allen Radiation Belt [PDF]

Space Weather
The outer Van Allen radiation belt is highly dynamic in both strength and location, being driven by several distinct physical processes, making it difficult to predict for spacecraft operators.
D. J. Weston, I. J. Rae, A. W. Smith, K. R. Murphy, C. E. J. Watt, F. X. Bocquet, S. Bingham, E. M. Henley   +7 more
doaj   +2 more sources

Empirically Estimated Electron Lifetimes in the Earth's Radiation Belts: Van Allen Probe Observations [PDF]

Geophysical Research Letters, 2020
AbstractWe use measurements from NASA's Van Allen Probes to calculate the decay time constants for electrons over a wide range of energies (30 keV to 4 MeV) and values ( = 1.3–6.0) in the Earth's radiation belts. Using an automated routine to identify flux decay events, we construct a large database of lifetimes for near‐equatorially mirroring ...
Claudepierre, SG, Ma, Q, Bortnik, J, O'Brien, TP, Fennell, JF, Blake, JB   +5 more
openaire   +6 more sources