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Reconstruction of gaps in the past history of solar wind parameters
Author(s) -
Kondrashov D.,
Denton R.,
Shprits Y. Y.,
Singer H. J.
Publication year - 2014
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2014gl059741
Subject(s) - geostationary orbit , solar wind , earth's magnetic field , interpolation (computer graphics) , empirical modelling , singular spectrum analysis , meteorology , geophysics , magnetic field , geology , environmental science , physics , computer science , algorithm , astronomy , satellite , motion (physics) , classical mechanics , quantum mechanics , singular value decomposition , programming language
The historical (1972–2013) gaps of the solar wind parameters are filled‐in by smooth modes of covariability using the continuous geomagnetic indices with Singular Spectrum Analysis (SSA). A systematic study using experiments with synthetic gaps has been performed to determine optimal SSA parameters for reconstruction of gaps over full solar cycle and to assess the reconstruction skill. We assessed the accuracy of the SSA gap‐filling for solar wind reconstruction in T96 and TS05 empirical magnetic field models by using GOES measurements at geostationary orbit, and compared it to the results based on parameters from existing Qin and Denton interpolation. The SSA gap‐filling method does improve accuracy of empirical magnetic field models, especially when gaps are large and in particular for the TS05 magnetic field model.