Results 31 to 40 of about 2,889 (155)

Faint Diffuse 557.7‐nm Emissions Equatorward of the Auroral Oval: Conjugate Observations by Ground Airglow Imagers and the Arase Satellite

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract At subauroral latitudes, discrete auroras, such as strong thermal emission velocity enhancement and stable auroral red arcs, have been extensively studied. On the other hand, diffuse emissions at subauroral latitudes have not been studied well.
M. Gomi, K. Shiokawa, Y. Miyoshi, Y. Otsuka, S. Oyama, M. Connors, A. Shinbori, T. Hori, C.‐W. Jun, K. Yamamoto, I. Shinohara, K. Asamura, S. Kasahara, K. Keika, S. Yokota, F. Tsuchiya, A. Kumamoto, Y. Kasahara, S. Matsuda, Y. Kazama, S.‐Y. Wang, S. W. Y. Tam, T.‐F. Chang, B.‐J. Wang, A. Matsuoka, M. Teramoto   +25 more
wiley   +1 more source

SAMI3 Simulations of a Persistent Plasmasphere Plume

Geophysical Research Letters, 2018
The Naval Research Laboratory Sami3 is Also a Model of the Ionosphere (SAMI3) ionosphere/plasmasphere code is used to examine the physics of a long‐lived plasmasphere plume. The May 1994 storm is simulated.
J. Krall, J. D. Huba, J. E. Borovsky
doaj   +1 more source

A new climatological electron density model for supporting space weather services

Journal of Space Weather and Space Climate, 2022
The ionosphere is the ionized part of the Earth’s atmosphere, ranging from about 60 km up to several Earth radii, whereas the upper part above about 1000 km height up to the plasmapause is usually called the plasmasphere.
Hoque Mohammed Mainul, Jakowski Norbert, Prol Fabricio S.   +2 more
doaj   +1 more source

OI 630 nm Airglow Observed From Space as a Diagnostic of Nighttime Low‐Latitude Ionospheric Dynamics

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study investigates the nighttime morphology of the bottomside F region (∼250 km) at low latitudes using 630 nm airglow measurements from the Visible and Infrared Spectral Imager (VISI) aboard the Ionosphere, Mesosphere, Upper Atmosphere, and Plasmasphere (IMAP) mission on the International Space Station. For this purpose, we analyzed IMAP/
Hyosub Kil, Se‐Heon Jeong, Jeong‐Heon Kim, Woo Kyoung Lee, Young‐Sil Kwak, Akinori Saito, Takeshi Sakanoi   +6 more
wiley   +1 more source

The plasmasphere tomography (PlaTo) mission concept

Frontiers in Astronomy and Space Sciences
The plasmasphere is the cold, dense torus of plasma extending from the topside ionosphere to approximately two to six Earth radii, containing a significant part of the mass of the magnetosphere.
Scott Thaller, Wendy Frank, David Malaspina, David Malaspina, Laila Andersson, Robert E. Ergun, Robert E. Ergun   +6 more
doaj   +1 more source

Simulating Bouncing Packets Driven by Ducted Lightning‐Generated Whistlers: Comparison With SAMPEX Observations

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Bouncing packets are quasi‐periodic microbursts separated by the electron bounce period. Solar Anomalous and Magnetospheric Particle Explorer observations revealed relativistic (>1 MeV) inner‐belt bouncing packets with “crown,” “decaying,” and “flat” envelopes.
L. Gan, W. Li, Q. Ma, L. Blum, D. Miller III., X. Li   +5 more
wiley   +1 more source

Ensemble modeling of long-term radiation belt dynamics: accounting for variability in radial diffusion

Frontiers in Astronomy and Space Sciences
This study presents ensemble modeling of outer radiation belt dynamics observed by Van Allen Probes throughout 2017 using DREAM3D simulations.
Sang-Yun Lee, Sang-Yun Lee, Weichao Tu, Gregory S. Cunningham, Gregory S. Cunningham, Misa M. Cowee   +5 more
doaj   +1 more source

Evolution of Reversed Electron Energy Spectra in Earth’s Radiation Belts Observed by CIRBE

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Following an intense geomagnetic storm (Dst < −150 nT) on 5 November 2023, electron fluxes in the outer radiation belt were reduced by more than three orders of magnitude at energies below ∼700 keV while they were enhanced at ∼1–3 MeV, leading to reversed energy spectra.
Ziye Zhang, Xinlin Li, Zheng Xiang, Declan O’Brien, Theodore Sarris, Misty Chien, Wesley Martin   +6 more
wiley   +1 more source

Substorm Effects on Chorus Emissions Modulated by ULF Waves

Geophysical Research Letters, Volume 53, Issue 17, 16 September 2026.
Abstract Although cross‐scale wave‐particle interactions play a critical role in energy transfer in the magnetosphere, the influence of geomagnetic activity on the physical mechanisms involved remains unclear. In this study, we investigate this question by analyzing Van Allen Probes‐A observations of an event occurring on 25 July 2016.
Xing‐Yu Li, Qiu‐Gang Zong, Shan Wang, Xu‐Zhi Zhou, Chao Yue, Robert Rankin, Li Li, Yong‐Fu Wang, Yi‐Xin Sun, Hua‐Yun Shen, Bin He, Yong Wu   +11 more
wiley   +1 more source

Proton‐Radiation‐Tolerant Silicon Photonic Charge Sensor for Spacecraft Applications

Advanced Sensor Research, Volume 5, Issue 9, September 2026.
A photonic charge sensor based on silicon photonic crystal waveguides is evaluated under proton irradiation to clarify radiation‐induced optical absorption during operation. The study quantitatively determines absorption increase at 20 keV and demonstrates retained spacecraft‐potential sensing after high‐fluence exposure, providing a quantitative basis
Wataru Takahama, Kosei Otsuka, Ayumi Ishihara, Rikuto Hojo, Tomofumi Mogami, Kazuhiro Toyoda, Kohtaku Suzuki, Yasushi Takahashi   +7 more
wiley   +1 more source