Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 34, issue 12
Articles | Volume 34, issue 12
https://doi.org/10.5194/angeo-34-1109-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Special issue:
https://doi.org/10.5194/angeo-34-1109-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 34, issue 12
Regular paper
 | 
29 Nov 2016
Regular paper |  | 29 Nov 2016

Spatial and temporal variation of total electron content as revealed by principal component analysis

Elsayed R. Talaat and Xun Zhu

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Short summary
Global total electron content data derived from the assimilated thermosphere–ionosphere model are analyzed using empirical orthogonal function (EOF) decomposition and the principal component analysis technique. The spectral analysis of the time series of the EOF coefficients reveals how different mechanisms such as solar flux variation, change in the orbital declination, nonlinear mode coupling and geomagnetic activity are separated and expressed in different EOFs.
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The 14th International Symposium on Equatorial Aeronomy