Results 101 to 110 of about 2,400 (232)

A Major Update to the PyIRI Model

Space Weather, Volume 24, Issue 6, June 2026.
Abstract This paper presents a major update to the PyIRI model, a fully vectorized Python implementation of the International Reference Ionosphere (IRI). The update reformulates the IRI core coefficients using spherical harmonics in Quasi‐Dipole (QD) latitude and Magnetic Local Time coordinates, replacing the legacy geographic‐coordinate‐based basis ...
Nina Servan‐Schreiber, Victoriya V. Forsythe, Meghan R. Burleigh, Kate A. Zawdie, Douglas P. Drob, Angeline G. Burrell, Joshua Semeter   +6 more
wiley   +1 more source

High‐Latitude GPS Position Error During Substorms

Space Weather, Volume 24, Issue 6, June 2026.
Abstract Substorms produce rapid fluctuations in Global Navigation Satellite System (GNSS) signals, leading to degraded positioning performance at high latitudes. This study investigates the correlation of auroral structures on Global Positioning System (GPS) Precise Point Positioning (PPP) error during three substorm events with different strengths ...
Weixuan Liao, Yukitoshi Nishimura, Waqar Younas, Wen Li, Keith M. Groves, Eric F. Donovan, Vassilis Angelopoulos   +6 more
wiley   +1 more source

An Exactly Energy-conserving Electromagnetic Particle-in-cell Method in Curvilinear Coordinates

The Astrophysical Journal Supplement Series
In this paper, we introduce and discuss an exactly energy-conserving particle-in-cell method for arbitrary curvilinear coordinates. The flexibility provided by curvilinear coordinates enables the study of plasmas in complex-shaped domains by aligning the
J. Croonen, L. Pezzini, F. Bacchini, G. Lapenta   +3 more
doaj   +1 more source

Ionospheric Characterization Over Iran Using Multi‐Frequency IMB HF Transmitters and Global WSPRNET Reception During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 6, June 2026.
Abstract The Ionospheric Monitoring Beacon network in Iran provides continuous, multi‐frequency high‐frequency (HF) transmissions using WSPRNET modulation, enabling global reception and near–real‐time monitoring of ionospheric propagation conditions.
A. Mahmoudian, Saba Hafizi Lotfabadi, Mohammad Azimi   +2 more
wiley   +1 more source

Conditions for Relativistic Magnetic Reconnection under the Presence of Shear Flow and Guide Field

The Astrophysical Journal
The scaling of the relativistic reconnection outflow speed is studied in the presence of both shear flows parallel to the reconnecting magnetic fields and guide fields pointing out of the reconnection plane.
Sarah Peery, Yi-Hsin Liu, Xiaocan Li
doaj   +1 more source

Circularly Expanding Ring‐Shaped Pulsating Aurora Visualizing the Source of Plasma Waves in Space

AGU Advances, Volume 7, Issue 3, June 2026.
Abstract Pulsating aurorae are prominent auroral emissions in the polar regions, typically occurring in the morning hours during the recovery phase of auroral substorms. These aurorae usually consist of round‐shaped patches of emission, with luminosity that pulsates at intervals ranging from less than a second to several tens of seconds.
K. Hosokawa, S. Kurita, Y. Miyoshi, S.‐I. Oyama, Y. Ogawa, M. Ozaki, Y. Kasahara, Y. Kasaba, S. Yagitani, S. Matsuda, F. Tsuchiya, A. Kumamoto, A. Matsuoka, S. Imajo, T. Raita, E. Turunen, T. Takashima, I. Shinohara, R. Fujii   +18 more
wiley   +1 more source

Relativistic Alfvén Turbulence at Kinetic Scales

The Astrophysical Journal
In a strongly magnetized, magnetically dominated relativistic plasma, Alfvénic turbulence can extend to scales much smaller than the particle inertial scales.
Cristian Vega, Stanislav Boldyrev, Vadim Roytershteyn   +2 more
doaj   +1 more source

Syn‐ to Post‐Collisional Tectonic History of the Paleo‐Tethyan Orogenic Belt: Insights From Triassic Igneous Rocks in the North–Central Tibetan Plateau, China

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The closure of the Paleo‐Tethys Ocean was one of the most important global geological events which formed the framework of the East Asian continent during the early Mesozoic. The Longmu Co‐Shuanghu suture zone is considered to record closure of the main basin of the Paleo‐Tethys Ocean.
Jinyong Li, Qingguo Zhai, Yiming Liu, Peiyuan Hu, Yue Tang, Lingfang Wu, Ning Yang   +6 more
wiley   +1 more source

Frozen-field Modeling of Coronal Condensations with MPI-AMRVAC. II. Optimization and Application in 3D Models

The Astrophysical Journal
The frozen-field hydrodynamic (ffHD) model is a simplification of the full magnetohydrodynamical equations under the assumption of a rigid magnetic field, which significantly reduces computational complexity and enhances efficiency.
Yuhao Zhou, Xiaohong Li, Jack M. Jenkins, Jie Hong, Rony Keppens   +4 more
doaj   +1 more source

What Observations Would an Energetic Neutral Atom Imager Have Made During the Voyager 2 Flyby of Uranus?

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract We present large‐scale simulations of energetic neutral atom (ENA) emissions at Uranus from a spacecraft viewpoint. Models of magnetic field, extended hydrogen exosphere, moon‐sourced neutral tori, and proton radiation belt are implemented into a simulator to evaluate the production of ENAs for L $L$ = 1–15.
D. Santos‐Costa, N. André
wiley   +1 more source