scholarly journals Modelling and Analysis of POGS Data over Southern Africa by Spherical Cap Harmonic Analysis

1997 ◽  
Vol 49 (2) ◽  
pp. 441-452 ◽  
Author(s):  
P. B. Kotzé ◽  
D. R. Barraclough
Keyword(s):  
Harmonic Analysis ◽  
Southern Africa ◽  
Spherical Cap ◽  
Spherical Cap Harmonic Analysis

Application of Spherical Cap Harmonic Analysis on CHAMP satellite data to develop a lithospheric magnetic field model over southern Africa at satellite altitude

2019 ◽  
Vol 122 (2) ◽  
pp. 163-172 ◽  
Author(s):  
E. Nahayo ◽  
P. B. Kotzé ◽  
S. J. Webb
Keyword(s):  
Harmonic Analysis ◽  
Satellite Data ◽  
Southern Africa ◽  
African Region ◽  
Tectonic Structures ◽  
Spherical Cap ◽  
Champ Satellite ◽  
Satellite Altitude ◽  
Magnetic Field Model ◽  
Spherical Cap Harmonic Analysis

Abstract We apply a Spherical Cap Harmonic Analysis technique on CHAMP satellite data recorded over southern Africa between 2007.0 and 2009.0 epochs, and develop a Southern African Lithospheric Magnetic Model (SALMM) at satellite altitude. The comparative evaluation of the SALMM with the global model MF7 shows a good agreement in the Y and Z field components that are not much contaminated by external field contributions. We use the Z lithospheric field map to confirm the prominent long-wavelength anomalies over the southern African region and its surrounding ocean areas, discussing the underlying geological and tectonic structures of the identified crustal anomalies.

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