Schmidt Institute of Physics of the Earth, RAS
Moskva, Russian Federation
Geophysical Center RAS
Space Research Institute
Moscow, Russian Federation
CSCSTI 37.00
CSCSTI 38.00
Russian Classification of Professions by Education 05.00.00
Russian Library and Bibliographic Classification 26
Russian Trade and Bibliographic Classification 63
BISAC SCI SCIENCE
A mathematical technology for digital processing of geophysical signals has been developed for estimating non-stationary parametric functions. Two-stage approximations with local models in the first stage and weighted approximation averaging models in the second stage were used. Algorithms for calculating estimates of parametric amplitude and frequency functions, increment/decrement functions, and frequency dispersions have been developed. Error formulas for estimating parametric pulsation functions have been proposed. Examples of applying the technology to model and experimental observations have been implemented. The technology's capabilities are demonstrated, allowing for the calculation of frequency function estimates and frequency derivative functions for geomagnetic pulsations of the “pearl” type.
Geophysical signals, geomagnetic pulsations, non-stationary parameters, two-stage approximation, local approximations, weighted averaging
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