New representation of geomagnetic secular variation over restricted regions by means of spherical cap harmonic analysis: application to the case of Spain

1992 ◽  
Vol 74 (3-4) ◽  
pp. 209-217 ◽  
Author(s):  
J.M. Torta ◽  
A. García ◽  
J.J. Curto ◽  
A. De Santis
Keyword(s):  
Harmonic Analysis ◽  
Secular Variation ◽  
Geomagnetic Secular Variation ◽  
Spherical Cap ◽  
Analysis Application ◽  
Spherical Cap Harmonic Analysis

scholarly journals Development of an improved geomagnetic reference field of Antarctica

1999 ◽  
Vol 42 (2) ◽  
Author(s):  
A. De Santis ◽  
M. Chiappini ◽  
J. M. Torta ◽  
R. R. B. von Frese
Keyword(s):  
Magnetic Field ◽  
Secular Variation ◽  
Reference Model ◽  
Reference Field ◽  
Spherical Cap ◽  
Core Field ◽  
The Core ◽  
Spherical Cap Harmonic Analysis ◽  
The Antarctic ◽  
Magnetic Observatories

The properties of the Earth's core magnetic field and its secular variation are poorly known for the Antarctic. The increasing availability of magnetic observations from airborne and satellite surveys, as well as the existence of several magnetic observatories and repeat stations in this region, offer the promise of greatly improving our understanding of the Antarctic core field. We investigate the possible development of a Laplacian reference model of the core field from these observations using spherical cap harmonic analysis. Possible uses and advantages of this approach relative to the implementations of the standard global reference field are also considered.

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