Results 11 to 20 of about 6,894 (155)

Simulation of Van Allen Probes plasmapause encounters [PDF]

Journal of Geophysical Research: Space Physics, 2014
AbstractWe use anE×B‐driven plasmapause test particle (PTP) simulation to provide global contextual information for in situ measurements by the Van Allen Probes (Radiation Belt Storm Probes (RBSP)) during 15–20 January 2013. During 120 h of simulation time beginning on 15 January, geomagnetic activity produced three plumes.
Goldstein, J., De Pascuale, S., Kletzing, C A., Kurth, W. S., Genestreti, K J, Skoug, R. M., Larsen, Bradford, Kistler, Lynn M., Mouikis, Christoforos, Spence, Harlan E.   +9 more
openaire   +4 more sources

Flight Calibration of the Van Allen Probe Magnetometers [PDF]

The Astrophysical Journal Supplement Series, 2020
Abstract The twin Van Allen Probes each carry a triaxial fluxgate magnetometer. Their orbits transverse a large of range of magnetic intensity. A procedure is described that calibrates the magnetometer in the spinning-spacecraft frame and in the presence of a persistent gradient of the magnetic field.
Bernard J. Vasquez, Charles W. Smith, Kristoff W. Paulson, C. A. Kletzing   +3 more
openaire   +1 more source

Specifying High Altitude Electrons Using Low‐Altitude LEO Systems: Updates to the SHELLS Model

Space Weather, 2023
We describe a new version of the SHELLS model, which specifies the outer electron belt environment as observed by the Van Allen Probes using the Kp Index and data from Polar‐orbiting Operational Environmental Satellites and the Meteorological Operational
A. J. Boyd, J. C. Green, T. P. O’Brien, S. G. Claudepierre   +3 more
doaj   +1 more source

Enhanced Radiation Levels at Aviation Altitudes and Their Relationship to Plasma Waves in the Inner Magnetosphere

Space Weather, 2023
It is believed that galactic cosmic rays and solar energetic particles are the two major sources of ionizing radiation. However, the radiation source may also be due to relativistic electrons that are associated with precipitation from the Van Allen ...
Homayon Aryan, Jacob Bortnik, W. Kent Tobiska, Piyush Mehta, Rashmi Siddalingappa   +4 more
doaj   +1 more source

Earth's Van Allen Radiation Belts: From Discovery to the Van Allen Probes Era [PDF]

Journal of Geophysical Research: Space Physics, 2019
AbstractDiscovery of the Earth's Van Allen radiation belts by instruments flown on Explorer 1 in 1958 was the first major discovery of the Space Age. The observation of distinct inner and outer zones of trapped megaelectron volt (MeV) particles, primarily protons at low altitude and electrons at high altitude, led to early models for source and loss ...
W. Li, M.K. Hudson
openaire   +1 more source

Wave–particle interaction effects in the Van Allen belts

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   +1 more source

A Tale of Two Radiation Belts: The Energy‐Dependence of Self‐Limiting Electron Space Radiation

Geophysical Research Letters, 2021
The flux of energetic electrons in the terrestrial Van Allen Belts varies by orders of magnitude during a magnetic storm. Here, we show how the dynamics of these electrons are clearly separated by energy into two distinct populations which are governed ...
L. Olifer, I. R. Mann, A. Kale, B. H. Mauk, S. G. Claudepierre, D. N. Baker, H. E. Spence, L. G. Ozeke   +7 more
doaj   +1 more source

Radiation Belt Daily Average Electron Flux Model (RB‐Daily‐E) From the Seven‐Year Van Allen Probes Mission and Its Application to Interpret GPS On‐Orbit Solar Array Degradation

Space Weather, 2022
We use NASA's Van Allen Probes data to build a 3‐dimensional Radiation Belt Daily Average Electron flux model (RB‐Daily‐E) covering 25 differential energies (33–7,700 keV), 17 pitch angles, and a variable number of L shells from 2 to 7. RB‐Daily‐E can be
Christine Gabrielse, Justin H. Lee, Seth Claudepierre, Don Walker, Paul O’Brien, James Roeder, Yao Lao, Jann Grovogui, Drew L. Turner, Andrei Runov, Alexander Boyd, Joseph Fennell, J. Bernard Blake, Kevin Lopez, Yoshizumi Miyoshi, Kunihiro Keika, Nana Higashio, Iku Shinohara, Shun Imajo, Satoshi Kurita, Takefumi Mitani   +20 more
doaj   +1 more source

Quasi Thermal Noise Spectroscopy for Van Allen Probes [PDF]

Journal of Geophysical Research: Space Physics, 2019
AbstractQuasi thermal fluctuations in the Langmuir/upper‐hybrid frequency range are pervasively observed in space plasmas including the radiation belt and the ring current region of inner magnetosphere as well as the solar wind. The quasi thermal noise spectroscopy may be employed in order to determine the electron density and temperature as well as to
Peter H. Yoon, Junga Hwang, Hyangpyo Kim, Jungjoon Seough   +3 more
openaire   +1 more source

An empirical model of the global distribution of plasmaspheric hiss based on Van Allen Probes EMFISIS measurements

Earth and Planetary Physics, 2020
Using wave measurements from the EMFISIS instrument onboard Van Allen Probes, we investigate statistically the spatial distributions of the intensity of plasmaspheric hiss waves.
JingZhi Wang, Qi Zhu, XuDong Gu, Song Fu, JianGuang Guo, XiaoXin Zhang, Juan Yi, YingJie Guo, BinBin Ni, Zheng Xiang   +9 more
doaj   +1 more source