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UDC 004.932.2

ANALYSIS OF RADIATION SPECTRUM FROM THE ASTRONOMICAL OBJECT OF ARTIFICIAL ORIGIN BY BILATERAL PRONY’S METHOD

D. V. Avramenko, post-graduate student, RSREU; This email address is being protected from spambots. You need JavaScript enabled to view it.
V. G. Andreev, Dr. in technical sciences, PhD, full professor, department of radioengineering systems, RSREU; This email address is being protected from spambots. You need JavaScript enabled to view it.

The problem of spectral estimation of light reflections from the artificial satellite of the Earth «Iridium» with its simultaneous observations in different ranges of electromagnetic waves is considered. The aim of the work is to improve the quality of spectral evaluation of brightness changes of multifrequency reflections from space objects by the bilateral Pronyʼs method. The analysis of the technique to describe the data observed by the sum of exponential functions in the conditions of short time samples in comparison with the autoregressive method is carried out. It is shown that ΔF values are significantly reduced (up to 8,4 times) using the two-way Pronyʼs least squares method for spectral analysis, which smoothly changes its intensity of Y process of light reflections from a space object.

Key words: two-sided Pronyʼs method, spectral parametric estimation, digital signal processing, redefined system of Yule – Walker equations, quasi-inverse matrix, minimization of average error square, weight vector.

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