Results 31 to 40 of about 1,592 (183)
Variación secular reciente y cartas de los elementos del campo geomagnético en México
Geofísica Internacional, 1991 Se presentan cartas sintéticas de los elementos del campo magnético en el territorio nacional, elaboradas con base en el Campo Geomagnético Internacional de Referencia (IGRF).
J. J. Campos Enríquez +2 more
doaj +1 more source
IGRF candidates for 1980 and 1985
Physics of the Earth and Planetary Interiors, 1987 Abstract A tenth degree and order spherical harmonic model of the main geomagnetic field for 1980 has been derived using MAGSAT data supplemented by aeromagnetic vector data collected by the Project MAGNET aircraft. A secular variation model of degree and order 8 for 1982.5 based on magnetic observatory and repeat station measurements has also been ...
J.M. Quinn +2 more
+5 more sources
, 2020 Update to use IGRF13 model use CLI interface instead of f2py--solves numerous long-standing issues in general with f2py by not using it use Python >= 3.7 for reliability across Python install types add CI to CLI as well as module update Matlab ...
Michael Hirsch
core +1 more source
Earth, Planets and Space, 2020 The IGRF offers an important incentive for testing algorithms predicting the Earth’s magnetic field changes, known as secular variation (SV), in a 5-year range. Here, we present a SV candidate model for the 13th IGRF that stems from a sequential ensemble
Sabrina Sanchez +2 more
doaj +1 more source
Wahana Fisika: Jurnal Penelitian Fisika dan TerapannyaPenelitian dengan metode geomagnetik di daerah panas bumi air putih Kabupaten Lebong dilakukan menggunakan alat PPM (Proton Precession Magnetometer) G856. Peta distribusi anomali medan magnet total dibuat dengan melewati tahapan reduksi dan koreksi data.
Eko Heru Purwanto +12 more
doaj +1 more source
Comparison of candidate IGRF models.
Journal of geomagnetism and geoelectricity, 1982 Three candidate models for the International Geomagnetic Reference Field (IGRF) for the years 1965, 1970, 1975, and 1980 are evaluated using magnetic observatory and satellite data. The models were submitted by the USGS, the IGS, and NASA. Comparison based on annual means data shows the differences between models to be small, although the NASA model ...
LANGEL, R. A., ESTES, R. H.
openaire +2 more sources
Evidence-based uncertainty estimates for the International Geomagnetic Reference Field
Earth, Planets and Space, 2022 The International Geomagnetic Reference Field (IGRF) is a multi-institute model of the Earth’s magnetic field, compactly described by sets of up to 195 spherical harmonic (Gauss) coefficients to degree and order 13, which allows the continuous evaluation
Ciarán D. Beggan
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
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IZMIRAN candidate field model for IGRF-13
Earth, Planets and Space, 2021 The International Geomagnetic Reference Field (IGRF) model is a combination of the several models developed by independent groups of scientists using different approaches for the selection of input data and methods for calculating harmonic coefficients ...
Valeriy G. Petrov, Tatyana N. Bondar
doaj +1 more source
First Observation of Four‐Band Ion Cyclotron Whistlers
Geophysical Research Letters, Volume 53, Issue 20, 28 October 2026.Abstract Ion cyclotron whistlers are frequently observed in low Earth orbit, typically formed when right‐hand polarized lightning whistlers undergo polarization reversal at crossover frequencies. In this study, we for the first time report a four‐band ion cyclotron whistler event detected by Van Allen Probe A.
Huicong Chen +6 more
wiley +1 more source