Results 51 to 60 of about 2,024,208 (246)

Observations and Fokker‐Planck Simulations of the L‐Shell, Energy, and Pitch Angle Structure of Earth's Electron Radiation Belts During Quiet Times

Journal of Geophysical Research: Space Physics, 2019
The evolution of the radiation belts in L‐shell (L), energy (E), and equatorial pitch angle (α0) is analyzed during the calm 11‐day interval (4–15 March) following the 1 March 2013 storm.
J. Ripoll, V. Loridan, Michael H. Denton, G. Cunningham, G. Reeves, O. Santolík, J. F. Fennell, D. Turner, A. Drozdov, J. S. C. Villa, Y. Shprits, S. Thaller, W. Kurth, C. Kletzing, M. Henderson, A. Ukhorskiy   +15 more
semanticscholar   +1 more source

Exploration of energization and radiation in geospace (ERG): challenges, development, and operation of satellite systems

Earth, Planets and Space, 2018
The exploration of energization and radiation in geospace (ERG) satellite, nicknamed “Arase,” is the second satellite in a series of small scientific satellites created by the Institute of Space and Astronautical Science of the Japan Aerospace ...
Yosuke Nakamura, Seisuke Fukuda, Yasuko Shibano, Hiroyuki Ogawa, Shin-ichiro Sakai, Shigehito Shimizu, Ersin Soken, Yu Miyazawa, Hiroyuki Toyota, Akio Kukita, Yusuke Maru, Junichi Nakatsuka, Tomohiko Sakai, Shinsuke Takeuchi, Kenichiro Maki, Makoto Mita, Emiko Ogawa, Yuya Kakehashi, Kumi Nitta, Kazushi Asamura, Takeshi Takashima, Iku Shinohara   +21 more
doaj   +1 more source

The Response of Earth's Electron Radiation Belts to Geomagnetic Storms: Statistics From the Van Allen Probes Era Including Effects From Different Storm Drivers

Journal of Geophysical Research: Space Physics, 2019
A statistical study was conducted of Earth's radiation belt electron response to geomagnetic storms using NASA's Van Allen Probes mission. Data for electrons with energies ranging from 30 keV to 6.3 MeV were included and examined as a function of L‐shell,
D. Turner, E. Kilpua, H. Hietala, S. Claudepierre, T. O'Brien, J. F. Fennell, J. Blake, A. Jaynes, S. Kanekal, D. N. Baker, H. Spence, J. Ripoll, G. Reeves   +12 more
semanticscholar   +1 more source

Forecasting the Earth’s radiation belts and modelling solar energetic particle events: Recent results from SPACECAST

Journal of Space Weather and Space Climate, 2013
High-energy charged particles in the van Allen radiation belts and in solar energetic particle events can damage satellites on orbit leading to malfunctions and loss of satellite service. Here we describe some recent results from the SPACECAST project on
Poedts Stefaan, Maget Vincent, Sicard Angelica, Boscher Daniel, Amariutei Olga A., Ganushkina Natalia Y., Afanasiev Alexandr, Vainio Rami, Koskinen Hannu, Meredith Nigel P., Glauert Sarah A., Horne Richard B., Jacobs Carla, Sanahuja Blai, Aran Angels, Heynderickx Daniel, Pitchford David   +16 more
doaj   +1 more source

Radial Transport Versus Local Acceleration: The Long‐Standing Debate

Earth and Space Science, 2022
On 28 July 2021, within the Geospace Environment Modeling Virtual Summer Workshop, a joint panel discussion organized by the “System Understanding of Radiation Belt Particle Dynamics through Multi‐spacecraft and Ground‐based Observations and Modeling ...
Alexander Y. Drozdov, Lauren W. Blum, Michael Hartinger, Hong Zhao, Solène Lejosne, Mary K. Hudson, Hayley J. Allison, Louis Ozeke, Allison N. Jaynes   +8 more
doaj   +1 more source

Space Weather Effects in the Earth’s Radiation Belts

, 2018
The first major scientific discovery of the Space Age was that the Earth is enshrouded in toroids, or belts, of very high-energy magnetically trapped charged particles.
D. Baker, P. Erickson, J. Fennell, J. Foster, A. Jaynes, P. Verronen   +5 more
semanticscholar   +1 more source

Pressure-induced drastic collapse of a high oxygen coordination shell in quartz-like α-GeO2

New Journal of Physics, 2014
With the combination of a single crystal diamond anvil cell and a polycapillary half-lens, the local structural evolution around germanium in tetrahedrally networked quartz-like α -GeO _2 has been investigated using extended x-ray absorption fine ...
Juncai Dong, Xiaoli Zhang, Qian Zhang, Ye Wu, Xiang Wu, Ziyu Wu, Dongliang Chen   +6 more
doaj   +1 more source

Characteristics, Occurrence, and Decay Rates of Remnant Belts Associated With Three‐Belt Events in the Earth's Radiation Belts

Geophysical Research Letters, 2018
Shortly after the launch of the Van Allen Probes, a new three‐belt configuration of the electron radiation belts was reported. Using data between September 2012 and November 2017, we have identified 30 three‐belt events and found that about 18% of ...
V. Pinto, J. Bortnik, P. Moya, L. Lyons, D. Sibeck, S. Kanekal, H. Spence, D. Baker   +7 more
semanticscholar   +1 more source

Modeling the Dynamic Variability of Sub‐Relativistic Outer Radiation Belt Electron Fluxes Using Machine Learning

Space Weather, 2022
We present a set of neural network models that reproduce the dynamics of electron fluxes in the range of 50 keV ∼1 MeV in the outer radiation belt.
Donglai Ma, Xiangning Chu, Jacob Bortnik, Seth G. Claudepierre, W. Kent Tobiska, Alfredo Cruz, S. Dave Bouwer, Joseph F. Fennell, J. Bernard Blake   +8 more
doaj   +1 more source

An operational approach to forecast the Earth’s radiation belts dynamics

Journal of Space Weather and Space Climate, 2021
The Ca index is a time-integrated geomagnetic index that correlates well with the dynamics of high-energy electron fluxes in the outer radiation belts.
Bernoux Guillerme, Brunet Antoine, Buchlin Éric, Janvier Miho, Sicard Angélica   +4 more
doaj   +1 more source