Use of principal component analysis for identification of temporal and spatial patterns in the dynamics of ionospheric equatorial anomaly

3rd International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

Maslennikova, Yu S.^1 ; Bochkarev, V.V.^1 ; Voloskov, D.S.^1

Kazan Federal University, Kremlevskaya str.18, Kazan

420018, Russia^1

关键词: Co-ordinate system;    Electronic content;    Jet Propulsion Laboratory;    Principal Components;    Principal components analysis;    Spearman's rank correlation coefficients;    Statistical relationship;    Temporal and spatial pattern;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/574/1/012152/pdf
DOI  :  10.1088/1742-6596/574/1/012152

来源: IOP

【 摘 要 】

In this paper we describe results of the principal components analysis of the dynamics of Total Electronic Content (TEC) data with the use of global maps presented by the Jet Propulsion Laboratory (NASA, USA) for the period of 2007-2011. We show that the result of the decomposition in principal components essentially depends on the method used for preprocessing the data, their representation (the used coordinate system), and the data centering technique (e.g., daily and seasonal components extracting). The use of momentarily co-moving frame of reference and other special techniques provide opportunity for the detailed analysis of the ionospheric equatorial anomaly. The covariance matrix of decomposition was calculated using Spearman's rank correlation coefficient that allows reducing statistical relationship between principal components.