Results 71 to 80 of about 545 (160)

Quantifying Errors in the Midpoint Transform Applied to Oblique Ionograms

Radio Science, Volume 61, Issue 7, July 2026.
Abstract It is important to specify the state of the ionosphere for Over‐the‐Horizon communications and surveillance. Both vertical and oblique ionograms provide valuable data to this end. Oblique ionograms can probe the ionosphere in locations where it would be impractical to build a vertical ionosonde, but their measurements are not straightforward ...
Joe Hughes, L. J. Nickisch, Sergey Fridman, Gregory Bullock, Shawn Kraut, Matt Hogan, Victoriya Forsythe   +6 more
wiley   +1 more source

Geomagnetic field modelling and USTHB IGRF-14 candidates

Earth, Planets and Space
The present paper describes the construction of a global spherical harmonic model of the geomagnetic field, developed as the USTHB (University of Science and Technology Houari Boumediene) candidate for the 14th generation of International Geomagnetic ...
Abdenaceur Lemgharbi, M. Hamoudi, V. Lesur, M. Mandea, T. Amezza, A. Abtout   +5 more
doaj   +1 more source

Secular variations of geomagnetic declination in the Karadag point and the global helio-geodynamic processes

Геофизический журнал, 2019
To study the changes in the local variations of geomagnetic field, the Karadag point was chosen due to the fact that we found previously on increased insolation and the surface temperature of the earth at this point over the last century (compared to ...
A. E. Volvach, G. S. Kurbasova
doaj   +1 more source

Should IGRF data be commercialized?

Eos, Transactions American Geophysical Union, 1990
At the 1989 International Association of Geomagnetism and Aeronomy meeting in Exeter, U.K., a proposal was presented to support geomagnetic observatories in the Third World by charging commercial users of the International Geomagnetic Reference Field a price for its use. The proposal guarantees research scientists free access to IGRF.
openaire   +1 more source

Global Effect of Long‐Lasting 07–12 October 2024 Geomagnetic Storms During the Transition From a Strong (G3) to a Severe (G4) on the Geomagnetic Field and Ionospheric Parameters Distribution

Space Weather, Volume 24, Issue 7, July 2026.
Abstract This study investigates the co‐evolution of geomagnetic field disturbances with ionospheric parameters and their characteristic latitudinal signatures by conducting a location and time‐dependent analysis of the 07–12 October 2024 events, to fill crucial gaps in understanding the coupled response of the magnetosphere‐ionosphere system. This has
Yekoye Asmare Tariku
wiley   +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

Global Mapping of Near-Earth Magnetic Fields Measured by KITSAT-1 and KITSAT-2 [PDF]

Journal of Astronomy and Space Sciences, 1994
The magnetic field measurements from the KitSat-1 and KitSat-2 were tested by comparing with the IGRF model. The magnetic data have been collected by a three-axis fluxgate magnetometer on each satellite at an altitude of 1,325km and 820km, respectively ...
Yoo-Surn Pyo, Dong-Hun Lee, Kyoung-Wook Min   +2 more
doaj  

NavFormer: IGRF Forecasting in Moving Coordinate Frames

CoRR
Triad magnetometer components change with sensor attitude even when the IGRF total intensity target stays invariant. NavFormer forecasts this invariant target with rotation invariant scalar features and a Canonical SPD module that stabilizes the spectrum of window level second moments of the triads without sign discontinuities.
Yoontae Hwang, Dongwoo Lee, Minseok Choi, Heechan Park, Yong Sup Ihn, Daham Kim, Deok-Young Lee   +6 more
openaire   +2 more sources

A New Model of Cutoff Latitude for Solar Energetic Protons Based on the Partial Least Squares Method

Space Weather, Volume 24, Issue 7, July 2026.
Abstract Solar energetic particle (SEP) events can cause space weather hazards, especially at high altitudes and in the polar regions. Therefore, it is important to determine the boundaries that SEPs with different energies/rigidities can access and impact. In this work, we develop a new model of cutoff latitude for solar energetic protons covering the
Zhenghao She, Hui Zhu, Qian Song, Yao Chen, Yingying Zhao, Huicong Chen, Zhijie Qin   +6 more
wiley   +1 more source

ITalian Geomagnetic Reference Field (ITGRF): update for 2000 and secular variation model up to 2005 by autoregressive forecasting

Annals of Geophysics, 2003
The updated version of the ITalian Geomagnetic Reference Field (ITGRF) for 2000.0 and its secular variation model up to 2005.0 are presented in this paper.
J. M. Torta, A. Meloni, G. Dominici, L. Gaya-Piqué, A. De Santis, R. Tozzi   +5 more
doaj   +1 more source