%0 Journal Article %T Estimation of Parameters of Non-stationary Geophysical Signals Based on Two-Stage Approximations Using Local Models %A Getmanov, V.G. %A Gvishiani, A.D. %A Pilipenko, V.A. %A Stukov, D.A. %K geophysical signals, geomagnetic pulsations, estimation, non-stationary parameters, two-stage approximation %J Russian Journal of Earth Sciences %D 2025 %N 25 %P 4 %I Geophysical Center of the Russian Academy of Sciences