Results 131 to 140 of about 7,331 (246)

Assessing GNSS Reflectometry for High‐Latitude 3D Ionospheric Imaging

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract This study investigates whether Global Navigation Satellite System Reflectometry (GNSS‐R) measurements from low‐Earth‐orbit (LEO) satellites can improve three‐dimensional (3D) ionospheric electron density imaging, with a focus on high‐latitude regions. Conventional ionospheric tomography is limited by sparse ground‐based receiver coverage over
Brenna Royersmith, Brian Breitsch, Jade Y. Morton   +2 more
wiley   +1 more source

Ray Tracing Method in a General Non‐Dipole Magnetic Field

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract We present a new general mathematical formulation of the Eikonal equations for ray tracing, which can use any internal magnetic field model. The analytical and tractable expressions are conveniently based on a vector formalism, which is independent of any coordinate system.
P.‐L. Blelly, J.‐F. Ripoll, A. Dubois, R. B. Horne, A. Marchaudon   +4 more
wiley   +1 more source

Latitude Survey of Neutrons and Muons to Determine Cosmic Ray Neutron Sensing Yield Functions

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Cosmic Ray Neutron Sensing (CRNS) is a ground‐based technique that utilizes epithermal neutron measurements as a proxy for environmental hydrogen content. Similarly to other ground‐based cosmic ray detectors (e.g., neutron monitors), CRNS detectors are affected by the solar cycle and space weather events.
Lasse Hertle, Fraser Baird, Ulrich Schmidt, Bernd Heber, Michael Walter, Nora Krebs, Paul Schattan, Pauli Väisänen, Peter Dietrich, Steffen Zacharias, Solveig Landmark, Daniel Rasche, Marco Kossatz, Gary Womack, Steve Hamann, Enrico Gazzola, Martin Schrön   +16 more
wiley   +1 more source

The arrangement of anisotropic spin couplings can optimize sensitivity of the cryptochrome radical pair to the direction of geomagnetic field. [PDF]

Sci Rep
Bezchastnov V, Domratcheva T.
europepmc   +1 more source

Near‐Earth Cosmic Ray Modulation Index ϕ and Neutron Monitor Cutoff Rigidities at Hourly Cadence: Toward an Improved Monitoring of Solar‐Terrestrial Radiation Environment, Space Weather, and Space Climate

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Cosmic rays (CRs) are energetic particles originating from galactic and extragalactic sources. When arriving into the solar system and the Sun's heliosphere, they are diverted and modulated by the magnetic activity of the Sun. This modulation can be quantified by the modulation parameter ϕ $\phi $ determined with the Force‐field approximation (
Pauli Väisänen, Nicholas Larsen, Sergey Koldobskiy, Markus Similä, David Pelosi, Miguel Orcinha   +5 more
wiley   +1 more source

Geophysical insights from the first geomagnetic field absolute intensity curve for central Asia (2200BCE-2000CE), and implications for archaeomagnetic dating. [PDF]

Sci Rep
Bonilla-Alba R, Gómez-Paccard M, Pavón-Carrasco FJ, Chauvin A, Beamud E, Martínez-Ferreras V, Gurt-Esparraguera JM, Luneau E, Osete ML.   +8 more
europepmc   +1 more source

Arase/LEPi Observations of Low‐Energy H+ and O+ Ion Fluxes in the Inner Magnetosphere: Implications for the Relationship Between Warm Plasma Cloak and Oxygen Torus

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract We investigated the spatial distributions and pitch‐angle distributions of 30–300 eV H+ and O+ ion fluxes using data obtained by the low‐energy particle experiments‐ion mass analyzer (LEPi) onboard the Arase satellite. A statistical analysis over 3.7 years reveals that the H+ ion flux is enhanced at L > 4 from the premidnight sector through ...
Masahito Nosé, Kazushi Asamura, Yoshizumi Miyoshi, Jih‐Hong Shue, Trunali Shah, Ayako Matsuoka, Mariko Teramoto, Kazuhiro Yamamoto, Atsushi Kumamoto, Fuminori Tsuchiya, Yoshiya Kasahara, Atsuki Shinbori, Iku Shinohara   +12 more
wiley   +1 more source

Enhancing Geomagnetic Navigation with PPO-LSTM: Robust Navigation Utilizing Observed Geomagnetic Field Data. [PDF]

Sensors (Basel)
Zhang X, Bai W, Liu J, Yang S, Shang T, Liu H.   +5 more
europepmc   +1 more source

Fundamental Poloidal Wave Event Extending From Midnight to Dawn

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract Fundamental poloidal (P1) waves are a class of magnetospheric standing Alfvén waves characterized by field line oscillations in the meridional plane. P1 waves are infrequently excited in the ring current region and are believed to be the source of giant pulsations (Pgs) observed on the ground. Pgs are mostly detected on the morning side with a
Kazue Takahashi, Michael D. Hartinger, Kiyokazu Koga   +2 more
wiley   +1 more source

Motonori Matuyama and reversals of geomagnetic field. [PDF]

Proc Jpn Acad Ser B Phys Biol Sci
Kono M.
europepmc   +1 more source