The influence of regularization on the geomagnetic core field modeling
地球与行星物理论评Earth's magnetic field is generated through the dynamo action in the liquid outer core. Using observational data from geomagnetic satellites and observatories, we can construct geomagnetic models that describe spatial and temporal variations of the core ...
Juyuan Xu, Yufeng Lin, Keke Zhang
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Geomagnetic modeling by optimal recursive filtering [PDF]
The results of a preliminary study to determine the feasibility of using Kalman filter techniques for geomagnetic field modeling are given. Specifically, five separate field models were computed using observatory annual means, satellite, survey and ...
Estes, R. H., Gibbs, B. P.
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Revisiting the Jurassic Geomagnetic Reversal recorded in the Lesotho Basalt (Southern Africa)
, 2003 We carried out a detailed and continuous paleomagnetic sampling of the reversed to normal geomagnetic transition recorded by some 60 consecutive flow units near the base of the Lesotho Basalt (183 1 Ma).
Camps +12 more
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Steady induction effects in geomagnetism. Part 1A: Steady motional induction of geomagnetic chaos [PDF]
Geomagnetic effects of magnetic induction by hypothetically steady fluid motion and steady magnetic flux diffusion near the top of Earth's core are investigated using electromagnetic theory, simple magnetic earth models, and numerical experiments with ...
Voorhies, Coerte V.
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The clustering of polarity reversals of the geomagnetic field
, 2006 Often in nature the temporal distribution of inhomogeneous stochastic point processes can be modeled as a realization of renewal Poisson processes with a variable rate.
A. Kageyama +17 more
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Steady induction effects in geomagnetism. Part 1B: Geomagnetic estimation of steady surficial core motions: A non-linear inverse problem [PDF]
The problem of estimating a steady fluid velocity field near the top of Earth's core which induces the secular variation (SV) indicated by models of the observed geomagnetic field is examined in the source-free mantle/frozen-flux core (SFI/VFFC ...
Voorhies, Coerte V.
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A Recursive Truncated Taylor Expansion Downward Continuation Method for Geomagnetic Field
Applied SciencesIn aeromagnetic detection and geomagnetic navigation, the reference geomagnetic maps usually need to be continued to different altitudes. Traditionally, the geomagnetic field upward continuation is stable.
Ke Wan +9 more
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Error enhancement in geomagnetic models derived from scalar data [PDF]
Models of the main geomagnetic field are generally represented by a scalar potential gamma expanded in a finite number of spherical harmonics. Very accurate observations of F were used, but indications exist that the accuracy of models derived from them ...
Bredekamp, J. H., Stern, D. P.
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Operational modelling of geomagnetic fields and geomagnetically induced currents
, 2021 Geomagnetically induced currents (GICs) have long been known to affect power systems adversely. Modelling these GICs usually involves consideration of a chain of coupled systems. The scope of the modelling chain spans multiple disciplines, from solar physics through to geophysics and power engineering.
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Investigation of Regional Geomagnetic Field Modelling in Indonesia [PDF]
, 2021 <p>This thesis deals with the application of the Spherical Cap Harmonic Analysis (SCHA) modelling technique to obtain geomagnetic field models for Indonesia, which have better resolution and accuracy than the International Geomagnetic Reference Field (IGRF).
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