Results 41 to 50 of about 545 (160)
Earth, Planets and Space, 2020 We have submitted a secular variation (SV) candidate model for the thirteenth generation of International Geomagnetic Reference Field model (IGRF-13) using a data assimilation scheme and a magnetohydrodynamic (MHD) dynamo simulation code.
Takuto Minami +8 more
doaj +1 more source
Parent magnetic field models for the IGRF-12GFZ-candidates [PDF]
Earth, Planets and Space, 2015 We propose candidate models for IGRF-12. These models were derived from parent models built from 10 months of Swarm satellite data and 1.5 years of magnetic observatory data. Using the same parameterisation, a magnetic field model was built from a slightly extended satellite data set.
Lesur, Vincent +5 more
openaire +4 more sources
Neutral Wind Dynamics in High‐Latitude Regions During the 17 March 2013 Storm
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract Neutral winds play a critical role in transporting mass, momentum, and energy throughout the upper atmosphere. During geomagnetic storms, momentum is transferred to the thermosphere primarily through ion–neutral collisions, along with other forces. This study investigates high‐latitude neutral wind dynamics during the 17 March 2013 storm using
A. Alhothali +2 more
wiley +1 more source
AGU Advances, Volume 7, Issue 4, August 2026.Abstract Wave‐particle resonance is a key mechanism for energy transfer in collisionless plasmas with important implications for wave excitation and particle acceleration. Cyclotron resonance occurs when a particle's gyromotion synchronizes with the wave fields, with their interactions usually describable by quasilinear diffusion or nonlinear trapping.
Jing‐Huan Li +14 more
wiley +1 more source
Statistical Survey of Cosmic Noise Absorption in Conjunction With Plasma Wave Measurements
Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract Using a decade of observations from the Canadian Geospace Observatory Riometer Network (GO‐RIO), we selected an east‐west subset of stations near L∼7 $L\sim 7$ to classify cosmic noise absorption (CNA) (a proxy for enhanced D‐region ionization) into two morphologies, simultaneous and drifting, based on the relative timing of signals across the
R. Ghaffari +3 more
wiley +1 more source
Journal of Big Data, 2023 The effectiveness of machine learning models can be significantly averse to redundant and irrelevant features present in the large dataset which can cause drastic performance degradation.
Yuhua Yin +6 more
doaj +1 more source
The problem with IGRF commercialization
Eos, Transactions American Geophysical Union, 1991 I wish to comment on the news item, “Geomagnetic Reference Field: To License or Not to License?,” by Stuart and others, which appeared in the February 19 issue of Eos. It is important to recall some of the history of establishing an International Geomagnetic Reference Field (IGRF) and the conditions that prevailed before the field was standardized ...
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Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.Abstract We investigate the statistical nature of Global Navigation Satellite System (GNSS) signal fluctuations through the multiscale analysis of a strong scintillation event recorded at the Ionospheric Observatory of the Luigi Broglio Space Center in Malindi, Kenya.
L. Spogli +5 more
wiley +1 more source
Micromachines, 2023 Optically pumped gradiometers have long been utilized in measurement in the International Geomagnetic Reference Field (IGRF). With advancements in technologies such as laser diodes and microfabrication, integrated gradiometers with compact sizes have ...
Haifeng Dong +3 more
doaj +1 more source
Eos, Transactions American Geophysical Union, 1969 A Fortran II Computer program has been developed by the U.S. Coast and Geodetic Survey to compute the International Geomagnetic Reference Field (IGRF) for any geographic position. To facilitate the portrayal and comparison of magnetic anomalies, the IGRF is used as a common datum for removal of regional gradients from magnetic survey measurements. This
openaire +1 more source