Results 71 to 80 of about 24,900,530 (148)

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

Quantitative Assessment of Geographic Control of December Solstice EIA Crest Shifts Over Southeast Asia Under Low Solar Activity

Space Weather, Volume 24, Issue 8, August 2026.
Abstract This study quantitatively assesses the drivers of the Equatorial Ionization Anomaly (EIA) morphology and latitudinal shifts over Southeast Asia during the December solstice. We use a 27‐year ionospheric data set (1998–2024) of total electron content (TEC) and F2‐layer peak electron density (NmF2) under geomagnetically quiet conditions.
Linfeng Huang, Jinsong Wang, Tian Mao, Shanhai Song, Yungang Wang   +4 more
wiley   +1 more source

International Geomagnetic Reference Field: the eleventh generation [PDF]

, 2017
The eleventh generation of the International Geomagnetic Reference Field (IGRF) was adopted in December 2009 by the International Association of Geomagnetism and Aeronomy Working Group V-MOD. It updates the previous IGRF generation with a definitive main
Langlais, B., Mandea, M., Chambodut, A., Thomson, A. W. P., Rother, M., Maus, S., Tøffner-Clausen, L., Bondar, T. N., Lowes, F. J., Chulliat, A., McLean, S., Golovkov, V. P., Finlay, C. C., Zvereva, T. I., Hulot, G., Olsen, N., Lühr, H., Kuang, W., Michaelis, I., Menvielle, M., Sabaka, T. J., Beggan, C. D., Holme, R., Tangborn, A., Thébault, E., Macmillan, S., Hamilton, B., Wei, Z., Chernova, T. A., Hamoudi, M., Lesur, V., Wardinski, I., Rauberg, J., Manoj, C.   +33 more
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Recurrent neural network trained with the extended Kalman filter to forecast the geomagnetic secular variation for IGRF-14

Earth, Planets and Space
This study proposes a neural network approach for predicting the geomagnetic secular variation (SV) to improve the accuracy and efficiency of short-term geomagnetic forecasts. The International Geomagnetic Reference Field (IGRF), updated every five years,
Sho Sato, Shin’ya Nakano, Vincent Lesur, Masaki Matsushima, Takuto Minami, Hiroaki Toh   +5 more
doaj   +1 more source

Second generation of CSES global geomagnetic field model (CGGM-2) and associated candidate models for IGRF-14

Earth, Planets and Space
This paper presents the second generation of the China Seismo-Electromagnetic Satellite (CSES) Global Geomagnetic Field Model (CGGM-2), specifically designed to derive candidate models for the fourteenth generation of the International Geomagnetic ...
Yanyan Yang, Zhima Zeren, Gauthier Hulot, Jie Wang, Nils Olsen, Siquan Yang, Bin Zhou, Werner Magnes, Bingjun Cheng, Jianpin Huang, Louis Chauvet, Dehe Yang, Roland Lammegger, Jian Lin, Dapeng Liu, Hengxin Lu, Na Zhou, Rui Yan, Zhenxia Zhang, Wei Chu, Song Xu, He Huang, Jing Cui, Qiao Tan, Wenjing Li, Feng Guo   +25 more
doaj   +1 more source

The GFZ IGRF candidate models and an assessment of secular variation predictions

Earth, Planets and Space
We outline the creation of the GFZ candidate models for the most recent International Geomagnetic Reference Field (IGRF-14), which is the result of an initiative by a working group of the International Association of Geomagnetism and Aeronomy (IAGA) and ...
Martin Rother, Maximilian Schanner, Monika Korte, Ingo Michaelis, Jürgen Matzka, Marcos Vinicius Siqueira da Silva   +5 more
doaj   +1 more source

Evaluation of candidate models for the 14th generation International Geomagnetic Reference Field

Earth, Planets and Space
In November 2024, the 14th revision of the International Geomagnetic Reference Field (IGRF) was issued by the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group (V-MOD).
C. D. Beggan, C. Kloss, A. Grayver, P. Alken, G. Balasis, W. Brown, S. Califf, L. Chauvet, A. Chulliat, M. Fillion, L. Gailler, G. Hulot, M. Korte, V. Lesur, Y. Lin, M. Matsushima, H. McCreadie, T. Minami, M. Nair, S. Nakano, F. J. Pavón-Carrasco, M. Rother, S. Sato, M. Serrano, M. V. da Silva, A. Smith, F. Terra-Nova, E. Thebault, H. Toh, I. Wardinski, C. Xiong   +30 more
doaj   +1 more source

Evaluation of candidate geomagnetic field models for IGRF-12 [PDF]

, 2015
Background: The 12th revision of the International Geomagnetic Reference Field (IGRF) was issued in December 2014 by the International Association of Geomagnetism and Aeronomy (IAGA) Division V Working Group V-MOD (http://www.ngdc.noaa.gov/IAGA/vmod ...
Lesur, Vincent, Beggan, Ciaran, C, Schachtschneider, Reyko, Beggan, Ciaran D., Manoj, Chandrasekharan, Lowes, Frank, J, Rother, Martin, Finlay, Christopher C., Finlay, Chris, Thébault, Erwan, Finlay, Christopher, C, Canet, Elisabeth, C, Chulliat, Arnaud, C, Chulliat, Arnaud, Langlais, Benoit, Lowes, Frank J., Alken, Patrick, Canet, Elisabeth   +17 more
core   +1 more source

MISTA candidate magnetic field models for IGRF-14 derived from MSS-1, Swarm and observatory data

Earth, Planets and Space
The International Geomagnetic Reference Field (IGRF) is a spherical harmonic model representing the large-scale Earth’s main magnetic field and its secular variation (SV).
Hongbo Yao, Pengfei Liu, Qing Yan, Yi Jiang, Juyuan Xu, Liang Yin, Zhengyong Ren, Yufeng Lin, Yan Feng, Yongxin Pan, Keke Zhang   +10 more
doaj   +1 more source

Model Sederhana IGRF Regional Indonesia 2010-2015

, 2010
Kebutuhan untuk mengetahui medan geomagnet utama tanpa pengaruh faktor eksternal sangat besar bagi para surveyor pertambangan, pengguna atau penyedia navigasi satelit dan ilmuwan -ilmuwan yang mempelajari cuaca ...
Fitri Nuraeni
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